Luobusaite: A New Mineral

doi：

Abstract：

A group of mantle minerals including about 70-80 subtypes of minerals are discovered from a podiform chromitite in Tibet, China. Recovered minerals include diamond, coesite, moissanite,wustite, Fe-silides and a new mineral, luobusaite. All of these minerals were hand-picked from heavy-mineral separates of the podiform chromitite in the mantle peridotite of an ophiolite. The grains of luobusaite are as host mineral with inclusions of native silicon or as an intergrowth with native silicon and Fe-Si phase. Luobusaite occurs as irregular grains, with 0.1-0.2 mm in size, consisting of very finegrained aggregates. The mineral is steel-grey in color, metallic luster, and opaque. The empirical formula (based on 2 for Si) is Fe0.83Si2, according to the chemical compositions of luobusaite. X-ray powder-diffraction data: orthorhombic system, space group Cmca, a = 9.874 (14) (A), b = 7.784 (5) (A), c=7.829(7) (A), Z=16.

作者：
Author：	BAI Wenji[1]  SHI Nicheng[2]  FANG Qingsong[1]  LI Guowu[2]  XIONG Ming[2]  YANG Jingsui[1]  RONG He[1]
作者單位：	Institute of Geology, Chinese Academy of Geological Sciences,Baiwanzhang Road 26, Beijing 100037 X-ray Laboratory, China University of Geosciences (Beijing),Xueyuan Road 29, Beijing 100083
期 刊：	地質學報（英文版）   SCI
Journal：	ACTA GEOLOGICA SINICA
年，卷(期)：	2006, 80(5)
分類號：	P5
Keywords：	new mineral    luobusaite    chromitite    ophiolite    Tibet
機標分類號：	P4 P5
機標關鍵詞：	podiform chromitite    mantle peridotite    empirical formula    new mineral
基金項目：	國家自然科學基金