Citations with the tag: ILMENITE
Results 1 - 50
- Neutron radiation effects on the nonlinear currentï¿½voltage characteristics of ilmenite-hematite ceramics.
Padmini, P.; Pulikkathara, M.; Wilkins, R.; Pandey, R. K. // Applied Physics Letters; 1/27/2003, Vol. 82 Issue 4, p586
Ilmenite-hematite (IH) is a wide-band gap semiconducting material with a potential for low-voltage varistor applications. The nonlinear characteristics of this material were investigated before and after exposure to high-energy neutron radiation. The typical current-voltage characteristics of a...
Padmini, P.; Pulikkathara, M.; Wilkins, R.; Pandey, R. K. // Mining Engineering; Jul2011, Vol. 63 Issue 7, p73
The article examines the condition of the zircon industry in 2011. The value of zircon is higher than other valuable heavy minerals including rutile and ilmenite. Also noted is the contribution of the electronic glass uses of zircon to demand for the mineral. Australia and South Africa has...
- Titanium Dioxide.
Padmini, P.; Pulikkathara, M.; Wilkins, R.; Pandey, R. K. // Paintindia; Oct2012, Vol. 62 Issue 10, p76
The article reports on developments relating to the titanium dioxide industry in India as of October 2012, including the availability of ilmenite deposits across the country, domestic production of the raw material and the Tata Group's plan to launch a titanium dioxide project in Tamil.
- Occurrence of zincian ilmenite from Srikurmam placer sand deposit, Andhra Pradesh, India.
Rao, M. Jagannadha; Jaya Raj, Aaron A.; Paul, K. John // Current Science (00113891); 11/10/2008, Vol. 95 Issue 9, p1124
A letter to the editor is presented in response to the article about the occurrence of zincian ilmenite from Srikurmam placer sand deposit in Andhra Pradesh in India that was published in the previous issue.
- The origin of rutile-ilmenite aggregates (â€œnigrineâ€) in alluvial-fluvial placers of the Hagendorf pegmatite province, NE Bavaria, Germany.
Dill, H. G.; Melcher, F.; Füßl, M.; Weber, B. // Mineralogy & Petrology; Mar2007, Vol. 89 Issue 3/4, p133
Titanium placer deposits occur in alluvial-fluvial drainage systems which dissect Moldanubian gneisses intruded by Late Variscan pegmatites (Hagendorf province) in southern Germany. Based upon their texture (zonation, exsolution lamellae, intergrowth), microchemical data (Nb, Cr, Ta, V, Fe, W,...
- Structure of Cadmium Titanate.
Shpilevaya, N. V.; Kabirov, Yu. V.; Kupriyanov, M. F. // Physics of the Solid State; Sep2004, Vol. 46 Issue 9, p1737
The structure of the ilmenite phase of cadmium titanate is determined and the structure of the perovskite phase of this compound is refined using x-ray powder diffraction. The effect of gamma radiation on the structure and properties of the perovskite phase is investigated. The nature of...
- Phase Transitions and Reaction Mechanism of Ilmenite Oxidation.
Xiao Fu; Yao Wang; Fei Wei // Metallurgical & Materials Transactions. Part A; May2010, Vol. 41 Issue 5, p1338
The oxidation of ilmenite ore is used in titanium processing. The effects of oxidation conditions, namely, temperature, ilmenite particle size, and oxygen pressure, on the product phase were investigated. The oxidation product from 773 to 1073 K (500 to 800 ï¿½C) includes a shear structure...
- Influence of Proton Radiation on the Nonlinear Current-Voltage Characteristics of Pulsed Laser Deposited Ilmenite-Hematite Thin Films.
Padmini, P.; Tompkins, F.; Shojah-Ardalan, S.; Kale, P.; Wilkins, R.; Pandey, R. K. // Journal of Electronic Materials; Aug2005, Vol. 34 Issue 8, p1095
Ilmenite-hematite (IH) [(1-x)FeTiO3ï¿½xFe2O3] solid solutions are unique classes of materials showing both magnetic and semiconducting properties, which make them potential candidates for novel applications in microelectronics and spintronics. This paper focuses on their varistor behavior...
- Paramagnetic resonance and susceptibility of ilmenite, FeTiO3 crystal.
McDonald, P. F.; Parasiris, A.; Pandey, R. K.; Gries, B. L.; Kirk, W. P. // Journal of Applied Physics; 1/15/1991, Vol. 69 Issue 2, p1104
Discusses a study which examined large high-purity single crystals of FeTiO[sub3] with ilmenite structure which have been grown from a stoichiometric melt. Indication of susceptibility measurements; Composition of the paramagnetic resonance spectrum for magnetic field; Status of the...
- Ilmenite from Kozohlody near GolÄÅ¯v JenÃkov (Czech Republic).
PAULIŠ, PETR; KOPECKÝ, STANISLAV // Bulletin Mineralogicko-Petrologickeho Oddeleni Narodniho Muzea v; 2009, Vol. 16 Issue 2, p245
An ilmenite forming a black and as much as 3 mm thick coat with metallic luster on rutile was newly discovered at the rutile-bearing locality at Kozohlody (4 km W of GolÄÅ¯v JenÃkov, Czech Republic).
- Shear Zone-hosted Migmatites (Eastern India): the Role of Dynamic Melting in the Generation of REE-depleted Felsic Melts, and Implications for Disequilibrium Melting.
Subhadip Bhadra; Suman Das; A. Bhattacharya // Journal of Petrology; Mar2007, Vol. 48 Issue 3, p435
In the Ranmal migmatite complex, non-anatectic foliated granite protoliths can be traced to polyphase migmatites. Structuralâ€“microtextural relations and thermobarometry indicate that syn-deformational segregationâ€“crystallization of in situ stromatic and diatexite leucosomes...
- New textural and mineralogical constraints on the origin of the Hongge Fe-Ti-V oxide deposit, SW China.
Wang, Christina; Zhou, Mei-Fu // Mineralium Deposita; Aug2013, Vol. 48 Issue 6, p787
The Hongge magmatic Fe-Ti-V oxide deposit in the Panxi region, SW China, is hosted in a layered mafic-ultramafic intrusion. This 2.7-km-thick, lopolith-like intrusion consists of the lower, middle, and upper zones, which are composed of olivine clinopyroxenite, clinopyroxenite, and gabbro,...
- Mineral chemistry of Pangidi basalt flows from Andhra Pradesh.
NAGESWARA RAO, P; SWAROOP, P; KARIMULLA, SYED // Journal of Earth System Science; Apr2012, Vol. 121 Issue 2, p525
This paper elucidates the compositional studies on clinopyroxene, plagioclase, titaniferous magnetite and ilmenite of basalts of Pangidi area to understand the geothermometry and oxybarometry conditions. Petrographic evidence and anorthite content (up to 85%) of plagioclase and temperature...
- Pigment in Manitoba.
NAGESWARA RAO, P; SWAROOP, P; KARIMULLA, SYED // Engineering & Mining Journal (00958948); Sep95, Vol. 196 Issue 9, p9
Reports that Gossan Resources Ltd. has discovered two ilmenite deposits in Pipestone and Kiskitto Lake in central Manitoba. Grading; Strike length of the Central Zone; Results of an initial metallurgical.
- Titanium Dissolution from Indonesian Ilmenite.
Subagja, Rudi; Andriyah, Lia; Lalasari, Latifa Hanum // International Journal of Basic & Applied Sciences; Aug2013, Vol. 13 Issue 4, p97
At present work, an experiment to dissolve titanium from Indonesian Ilmenite into the sulfuric acid solutions was carried out through a decomposition process using aqueous KOH solutions, and it was followed with titanium dissolution from decomposed Ilmenite into the aqueous sulfuric acid...
- Provenance of heavy minerals with special reference to ilmenite of the Honnavar beach, central west coast of India.
Hegde, V. S.; Shalini, G.; Kanchanagouri, D. Gosavi // Current Science (00113891); 9/10/2006, Vol. 91 Issue 5, p644
Heavy mineral assemblage and geochemistry of ilmenite from the Honnavar beach, Karnataka, central west coast of India have been studied to understand their provenance. The heavy mineral assemblage of ilmenite, magnetite, zircon, hornblende, epidote, sphene, kyanite, garnet and staurolite...
- Preparation and Characterization of Nanosized Titania Prepared from Beach Black Sands Broad on the Mediterranean Sea Coast in Egypt via Reaction with Acids.
Fouda, M. F. R.; Amin, R. S.; Saleh, H. I.; Labib, A. A.; Mousa, H. A. // Australian Journal of Basic & Applied Sciences; 2010, Vol. 4 Issue 10, p4540
In spite of the presence of huge quantities of black sands broaden along the beach of Mediterranean Sea, Egypt, which contain high reserves from ilmenite, only few studies were concerned with the extraction of titania from bearing titanium minerals. At the same time, the importation of titanium...
- Improving Ilmenite Smelting.
Coetzee, Colette; Sylv�n, Peter; Duncanson, Peter // Ceramic Industry; Mar2009, Vol. 159 Issue 3, p29
The article focuses on ilmenite smelting that produces a new lining configuration that can replace the conventional magnesia refractories. The ilmenite smelting process is described along with the new lining concept. The purpose of the furnace model is explained including the conclusions drawn...
- Structural Phase Transitions in CdTiO[sub 3].
Kabirov, Yu. V.; Kul�buzhev, B. S.; Kupriyanov, M. F. // Physics of the Solid State; Oct2001, Vol. 43 Issue 10, p1968
The reconstructive phase transition from the ilmenite-like CdTiO[sub 3] modification to the perovskite modification is investigated thoroughly. It is revealed that the reconstructive transition is determined by size effects, results in the formation of the closest packing of the ilmenite...
- Petrogenesis of Feï¿½Ti oxides in amphibole-rich veins from the Lherz orogenic peridotite (Northeastern Pyrï¿½nï¿½es, France).
Lorand, Jean-Pierre; Gregoire, Michel // Contributions to Mineralogy & Petrology; Jul2010, Vol. 160 Issue 1, p99
Accessory, homogeneous ilmenite and rutile are important oxide phases in amphibole-rich high-pressure cumulate veins which crosscut the Lherz orogenic lherzolite massif. Those veins crystallized from alkaline melts at P = 1.2ï¿½1.5 GPa within the uppermost lithospheric mantle. Transitional...
- Thermochemical transformations of ilmenite ï¿½ leucoxene concentrate.
Grass, V.; Sekushin, N.; Goldin, B. // Glass & Ceramics; Jan2010, Vol. 67 Issue 1/2, p59
Porous silicate-ferropseudobrookite composite material manifesting the properties of a ceramic n-type semiconductor has been synthesized by vacuum-heat treatment of ilmenite ï¿½ leucoxene concentrate modified by additions of magnesium oxide. The microstructure and the chemical and phase...
- Effect Of Roasting Temperature On The Magnetism Of Ilmenite.
Allen, N. R. // Physical Separation in Science & Engineering; Jun2003, Vol. 12 Issue 2, p103
The enhancement of ilmenite magnetic susceptibility by roasting is well known, and it is used routinely in the magnetic separation of mineral sands, yet surprisingly little appears to be known in detail about the development of this magnetisation as roast temperatures increase. An examination of...
- Conditions for the production of pigmentary titanium dioxide of rutile and anatase modifications by ilmenite processing with ammonium fluoride.
Andreev, A. A.; Diachenko, A. N. // Theoretical Foundations of Chemical Engineering; Oct2009, Vol. 43 Issue 5, p707
The process of ammoniac precipitation of hydrated titanium dioxide from a solution of ammonium hexafluorotitanate obtained during ilmenite processing by ammonium fluoride with the further sublimation separation of titanium tetrafluoride has been studied. The dehydration of hydrated titanium...
- Indicator minerals as guides to base metal sulphide mineralisation in Betul Belt, central India.
Ghosh, Biswajit; Praveen, M. N. // Journal of Earth System Science; Aug2008, Vol. 117 Issue 4, p521
Zn-bearing minerals that act as indicator minerals for base metal sulphide mineralization from the Proterozoic Betul Belt, central India with special emphasis on their genetic significance have been discussed. Sulphide mineralisation is hosted by the felsic volcanic rocks and has similarities...
- Characterization and Origin of Aluminous A-type Granites from the Lachlan Fold Belt, Southeastern Australia.
King, P.L.; White, A.J.R.; Chappell, B.W.; Allen, C.M. // Journal of Petrology; Mar1997, Vol. 38 Issue 3, p371
The metaluminous to weakly peraluminous A-type granites of the Lachlan Fold Belt are a distinctive group of igneous rocks, on the basis of chemical and mineralogical criteria. Those granites that contain âˆ¼65â€“72% SiO2 can be distinguished from other types on the basis of higher...
- Magnetite, ilmenite and ulvite in rocks and ore deposits: petrography, microprobe analyses and genetic implications.
Mücke, A. // Mineralogy & Petrology; Feb2003, Vol. 77 Issue 3/4, p215
SummaryÂ¶Detailed petrographic studies and microchemical analyses of titanomagnetite from igneous and metamorphic rocks and ore deposits form the basis of this investigation. Its aim is to compare the data obtained and their interpretations with the experimentally deduced subsolidus...
- Novel fusion method for direct determination of uranium in ilmenite, rutile, columbite, tantalite, and xenotime minerals by laser induced fluorimetry.
Radhamani, R.; Mahanta, P. L.; Murugesan, P.; Chakrapani, G. // Journal of Radioanalytical & Nuclear Chemistry; Aug2010, Vol. 285 Issue 2, p287
A simple, rapid, effective and eco-friendly decomposition method is developed for the determination of uranium (U) by laser induced fluorimetry (LIF). The salts of sodium di-hydrogen phosphate (NaH2PO4) and di-sodium hydrogen phosphate (Na2HPO4) were used in the ratio of 1:1 (phosphate flux) for...
- Cassiterite exsolution with ilmenite lamellae in magnetite from the Huashan metaluminous tin granite in southern China.
Wang, Ru; Yu, A-Peng; Chen, Jun; Xie, Lei; Lu, Jian-Jun; Zhu, Jin-Chu // Mineralogy & Petrology; May2012, Vol. 105 Issue 1/2, p71
Sn is generally the dominant form of tin in magnetite-series granites as shown by the presence of cassiterite or its incorporation into Ti-bearing minerals such as biotite and titanite. Little is known about the behavior of tin in magnetite. The Huashan granite is an oxidized tin granite in the...
- Preparation of Î²-Sialon/Ti(C, N) Composite Materials from Low-Grade Bauxite and Ilmenite.
Chen, Y. B.; Yang, D. X.; Shen, J. X.; Wang, B. C.; Liu, Y. G; Huang, Z. H.; Fang, M. H. // Interceram: International Ceramic Review; Jul2013, Vol. 62 Issue 3, p200
Î²-sialon/Ti (C, N) composite powders were synthesized via a carbothermal reduction nitridation (CRN) method using low-grade bauxite and ilmenite as starting materials and coke as the reducing agent. Then the composites were sintered from the Î²-sialon/Ti(C, N) composite powders in nitrogen...
- High Temperature Interaction Between H2, CH4, NH3 and Ilmenite.
De Maria, Giovanni; Brunetti, Bruno; Trionfetti, Giuseppe; Ferro, Daniela // AIP Conference Proceedings; 2003, Vol. 654 Issue 1, p1142
Three different reductive gaseous agents H2, CH4 and NH3 have been employed to investigate the high temperature reduction of ilmenite (FeTiO3). Thermogravimetry and mass spectrometry techniques have been utilized in the investigation of the reactions behavior. Considerations have been made on...
- Chemical ordering in ilmenite-hematite bulk ceramics through proton irradiation.
Allen, D. M.; Navarrete, L.; Dou, J.; Schad, R.; Padmini, P.; Kale, P.; Pandey, R. K.; Shojah-Ardalan, S.; Wilkins, R. // Applied Physics Letters; 12/13/2004, Vol. 85 Issue 24, p5902
We demonstrated the capability of MeV proton irradiation to promote chemical ordering processes in a solid at low temperature. We used the ilmeniteâ€“hematite solid solution system which allows estimation of the degree of ordering through measurement of its magnetization. Normally, ordering...
- Experimental Investigation on Mechanical Properties of Ilmenite based Al Nanocomposites.
Rasidhar, L.; Ramakrishna, A.; Srinivasa Rao, Ch. // International Journal of Engineering Science & Technology; May2013, Vol. 5 Issue 5, p1025
In the present investigation an attempt is made to fabricate Aluminium based metal matrix nanocomposite with Ilmenite nanoparticles. Nanocomposite is fabricated with different weight fractions (1,2,3,4,5%) of Ilmenite nanoparticles. Microstructure of fabricated composite shows the uniform...
- Lamellar magnetism in the haematite-ilmenite series as an explanation for strong remanent magnetization.
Robinson, Peter; Harrison, Richard J.; McEnroe, Suzanne A.; Hargraves, Robert B. // Nature; 8/1/2002, Vol. 418 Issue 6897, p517
Focuses on a study which proposed a ferrimagnetic substructure created by ferrous-ferric contact layers that reduce charge imbalance along lamellar contacts between antiferromagnetic haematite and paramagnetic ilmenite in solving magnetic anomalies. Saturation magnetization of the magnetic...
- Human Exposure to Mineral Sands Dust Particles.
Cunha, Kenya Dias da; Leite, Carlos V. Barros; Paschoa, Anselmo S. // AIP Conference Proceedings; 8/7/2008, Vol. 1034 Issue 1, p469
Dust particles were generated during the separation process of mineral sands to obtain rutile, ilmenite, zircon and monazite concentrates. Aerosol samples were collected at the village and during the reprocessing phase of ilmenite. A cascade impactor with six stages was used to collect mineral...
- Fuel for Fusion Power Abundant on Lunar Maria.
Graham, David // Astronomy; Nov99, Vol. 27 Issue 11, p32
Proposes that the moon may become a hot property for an efficient fuel from an isotope of helium called helium-3. Analyses of images from the Clementine spacecraft's 1994 visit to the moon; Reason for the scarcity of helium-3 on earth; Composition of ilmenite mineral.
- CRISTAL GLOBAL BACK INTEGRATES TO ILMENTE PROCESSING.
ALPEROWICZ, NATASHA // Chemical Week; 11/14/2011, Vol. 173 Issue 28, p23
The article reports on the plans of titanium dioxide producer Cristal Global to invest an undisclosed sum in an ilmenite processing plant at Yanbu, Saudi Arabia.
- Heavy Mineral Distribution in Stream Sediment of Tapah Area, Perak, Malaysia.
Hj Sibon, Mahat; Jamil, Habibah; Umor, Mohd Rozi; Wan Fuad Wan Hassan // AIP Conference Proceedings; Dec2013, Vol. 1571, p411
This paper aims to provide the overview of occurrence, distribution and origin of the heavy minerals in the study area. A total of 45 selected stream sediment heavy mineral concentrate samples were panned using standard dulangs, dried and separated from other light minerals using bromoform. The...
- Crystallographic preferred orientation of akimotoite and seismic anisotropy of Tonga slab.
Shiraishi, Rei; Ohtani, Eiji; Kanagawa, Kyuichi; Shimojuku, Akira; Dapeng Zhao // Nature; 10/2/2008, Vol. 455 Issue 7213, p657
The mineral akimotoite, ilmenite-structured MgSiO3, exists at the bottom of the Earthâ€™s mantle transition zone and within the uppermost lower mantle, especially under low-temperature conditions. Akimotoite is thought to be a major constituent of the harzburgite layer of subducting slabs,...
- Mï¿½ssbauer Study and Macroscopic/Global Magnetic Behavior of Powdered Ilmenite (FeTiO3) Sample.
Cuda, J.; Zboril, R.; Schneeweiss, O.; Tucek, J.; Prochazka, V.; Maslan, M.; Tucek, P. // AIP Conference Proceedings; 7/13/2010, Vol. 1258 Issue 1, p55
In this article, the commercial synthetic powdered sample of ilmenite (FeTiO3) has been re-examined by Mï¿½ssbauer spectroscopy in the paramagnetic regime from 77 K to 280 K and in a magnetically ordered state below 57 K. The effective vibrating mass and the Debye temperature was found to be...
- Technology development and management - A case based approach.
Kumar, S. Suresh // Chemical Business; Dec2006, Vol. 20 Issue 12, p35
The article focuses on a case based approach on technology development and management in the Regional Research Laboratory-Trivandrum (RRL-T) in India. A process for the production of welding electrode coating material directly from ilmenite was developed by RRL-T. The interplay of several rate...
- ILUKA EXPANDING FLORIDA/GEORGIA OPERATIONS.
Kumar, S. Suresh // Engineering & Mining Journal (00958948); Aug2002, Vol. 203 Issue 8, p7
Reports on the investment of Australia's Iluka Resources Ltd. to expand production of ilmenite, rutile and zircon at its mineral sands operations in northern Florida and southern Georgia. Relocation of a mobile concentrator to an adjacent lease area; Decommissioning of a dredge and concentrator...
- Ilmenite composition in the Tellnes Feï¿½Ti deposit, SW Norway: fractional crystallization, postcumulus evolution and ilmeniteï¿½zircon relation.
Charlier, Bernard; Sk�r, �yvind; Korneliussen, Are; Duchesne, Jean-Clair; Vander Auwera, Jacqueline // Contributions to Mineralogy & Petrology; Jul2007, Vol. 154 Issue 2, p119
Major and trace element XRF and in situ LA-ICP-MS analyses of ilmenite in the Tellnes ilmenite deposit, Rogaland Anorthosite Province, SW Norway, constrains a two stage fractional crystallization model of a ferrodioritic Fe-Ti-P rich melt. Stage 1 is characterized by ilmenite-plagioclase...
- The effect of roasting temperature on ilmenite particle rotation characteristics in a rotating magnetic field.
Allen, N.R. // Physical Separation in Science & Engineering; Sep2003, Vol. 12 Issue 3, p1
Examines the impact of roasting temperature on ilmenite particle rotation characteristics in a rotating magnetic field. Magnetic separation; Measurement of magnetic susceptibility; Increase in magnetic anisotropy and coercive force; Magnetizing roast process.
- Slon magnetic separators applied in the ilmenite processing industry.
Dahe, Xiong // Physical Separation in Science & Engineering; Sep/Dec2004, Vol. 13 Issue 3/4, p119
SLon vertical ring pulsating high gradient magnetic separators possess the advantages of a large beneficial ratio, high processing efficiency, strong adaptability, high resistance of the magnetic matrix to clogging, and high equipment availability. In recent years, these separators have been...
- Hazard in reaction of titanium raw materials with sulphuric acid.
Jablonski, M.; Przepiera, A. // Journal of Thermal Analysis & Calorimetry; Mar2006, Vol. 83 Issue 3, p571
The reaction of ilmenite titanium raw material with sulphuric acid was investigated in ï¿½hazardï¿½ type calorimetric system. The investigations show the essential influence of initial temperature, particle size distribution and concentration of sulphuric acid on rate and heat power of...
- Structure formation of acid-resistant refractories with firing of the argillaceous part of zircon-ilmenite ore gravitation tailings.
Abdrakhimova, E. // Refractories & Industrial Ceramics; Oct2009, Vol. 50 Issue 5, p324
A scheme for forming a strong structure of specimens and separation of three firing periods are d based on analyzing the results of studying features of structure formation during firing the argillaceous part of gravitation tailings that have a complex mineral composition.
- Direct methanol fuel cells with reticulated vitreous carbon, uncompressed graphite felt and Ti mesh anodes.
Cheng, Tommy T.; Gyenge, Elod // Journal of Applied Electrochemistry; Jan2008, Vol. 38 Issue 1, p51
Reticulated vitreous carbon (RVC, 39 pores per cm), uncompressed graphite felt (UGF) and Ti mesh were investigated as 3-D anode catalyst supports for direct liquid methanol fuel cells with the aim of improving the catalyst mass specific activity. Mesoporous Ptï¿½Ru layers composed of...
- TiO2 buyers report ample supply.
TERRY, LARRY // ICIS Chemical Business; 2/27/2012, Vol. 281 Issue 8, p8
The article presents an update on the titanium dioxide market. It is said that North American titanium dioxidebuyers are contend ample supply within the region weakens producers' arguments for price gains in April 2012, however have noted the ongoing cost pressure from ilmenite ore. In February...
- Production of titanium carbide from ilmenite.
Kanokon Nuilek; Napisporn Memongkol; Sutham Niyomwas // Songklanakarin Journal of Science & Technology; 2008, Vol. 30 Issue 2, p239
The production of titanium carbide (TiC) powders from ilmenite ore (FeTiO3) powder by means of carbothermal reduction synthesis coupled with hydrochloric acid (HCl) leaching process was investigated. A mixture of FeTiO3 and carbon powders was reacted at 1500ï¿½C for 1 hr under flowing argon...
- Madagascar mining: A silver lining?
Barraclough, Colin // Christian Science Monitor; 10/2/97, Vol. 89 Issue 216, p6
Reports on the debate in Madagascar over whether to allow mining company Rio Tinto to develop a mine to harvest the high-grade ilmenite which lies buried there. Opposition to the mine from environmentalists who fear the extinction of several native species of plants and animals; What Rio Tinto...