论文部分内容阅读
Laihunite reported in the present paper is a new iron silicate mineral found in Chinawith the following characteristics:(1)This mineral occurs in a metamorphic iron deposit,associated with fayalite,hypers-thene,quartz,magnetitc,etc.(2)The mineral is opaque,black in colour,thickly tabular in shape with luster metallicto sub-metallic,two perfect cleavages and specific gravity of 3.92.(3)Its main chemical components are Fe and Si with Fe~(3+)>Fe~(2+).The analysis gavethe formula of Fe Fe_(1.00)~(3+)·Fe_(0.58)~(2+)·Mg_(0.03)~(2+)Si_(0.96)O_4.(4)Its DTA curve shows an exothermic peak at 713℃.(5)The mineral has its own infrared spectrum distinctive from that of other minerals.(6)This mineral is of orthorhombic system;space group:C_2~5h-P2_1/c;unit cell:a=5.813±0.005,b=4.812±0.005,c=10.211±0.005,β=90.87°.(7)The Mssbauer spectrum of this mineral is given,too.
Laihunite reported in the present paper is a new iron silicate mineral found in China with the following characteristics: (1) This mineral occurs in a metamorphic iron deposit, associated with fayalite, hypers-thene, quartz, magnetitc, etc. (2) The mineral is opaque, black in color, thickly tabular in shape with luster metallicto sub-metallic, two perfect cleavages and specific gravity of 3.92. (3) Its main chemical components are Fe and Si with Fe ~ (3 +)> Fe ~ (2 +). The analysis gave the formula Fe Fe ~ (1.00) ~ (3+) · Fe_ (0.58) ~ (2+) · Mg_ (0.03) ~ (2+) Si_ (0.96) O_4. (5) The mineral has its own infrared spectrum distinctive from that of other minerals. (6) This mineral is of orthorhombic system; space group: C_2 ~ 5h-P2_1 / c; unit cell: a = 5.813 ± 0.005, b = 4.812 ± 0.005, c = 10.211 ± 0.005, β = 90.87 °. (7) The Mssbauer spectrum of this mineral is given, too.