地质学报（英文版）
地質學報（英文版）
지질학보（영문판）
ACTA GEOLOGICA SINICA
2012年
3期
533-538
,共6页
new mineral%fersilicite%chromite%Luobusha ophiolite%Tibet
A new mineral species,named naquite(FeSi),is found in the podiform chromitites of the Luobusha ophiolite in Qusong County,Tibet,China.The detailed composition is Fe 65.65,Si 32.57and Al 1.78 wt％,The mineral is cubic,space group P213.The irregular crystals range from 15 to 50 pm in diameter and form an intergrowth with iuobusaite.Naquite is steel grey in color,opaque,with a metallic lustre and gives a grayish-black streak.The mineral is brittle,has a conchoidal fracture and no apparent cleavage.The estimated Mohs hardness is 6.5,and the calculated density is 6.128 g/cm3.Unit-cell parameters are a 4.486 (4) （A）,V 90.28 (6) （A）3,Z=4.The five strongest powder diffraction lines [d in （A (hkl) (I/I0)] are:3.1742 (110) (40),2.5917(111) (43),2.0076 (210) (100),1.8307 (211) (65),and 1.1990 (321) (36).Originally called ‘fersilicite',the species and new name have now been approved by the CNMNC (IMA 2010-010).
