Laihunite—A new iron silicate mineral |
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| Authors: | Laihunite Research Group |
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| Institution: | Laihunite Research Group,Institute of Geochemistry. Academia Sinica and Geological Team No. 101 of Liaoning Metallurgical and Geological Prospecting Company |
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| Abstract: | Laihuite reported in the present paper is a new iron silicate mineral found in China with the following characteristics: - This mineral occurs in a metamorphic iron deposit, associated with fayalite, hypersthene, quartz, magnetitc, etc.
- The mineral is opaque, black in colour, thickly tabular in shape with luster metallic to sub-metallic, two perfect cleavages and specific gravity of 3.92.
- Its main chemical components are Fe and Si with Fe3+>Fe2+. The analysis gave the formula of Fe Fe 1.00 3+ ·Fe 0.58 2+ ·Mg 0.03 2+ ·Si0.96O4.
- Its DTA curve shows an exothermic peak at 713°C.
- The mineral has its own infrared spectrum distinctive from that of other minerals.
- This mineral is of orthorhombic system; space group:C 2h /5 ?P21/c; unit cell:α=5.813ű0.005,b=4.812ű0.005,c=10.211ű0.005,β=90.87°.
- The Mössbauer spectrum of this mineral is given, too.
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