【摘要】 雅鲁矿产于中国西藏曲松县罗布莎蛇绿岩铬铁矿山中(29°5′N,92°5′E,拉萨市东南约200公里处)。伴生矿物有金刚石、碳硅石、方铁矿、锇铱矿、铱锇矿(自然锇)、方镁石、铬铁矿等。与雅鲁矿伴生的金属碳化物有桐柏矿、陨碳铁矿、钛碳矿和曲松矿(IMA2007-034)。雅鲁矿及其伴生矿物都是从人工重砂大样中经选矿富集后得到的。该矿物为不规则粒状,粒径20~60μm,钢灰色,不透明。莫氏硬度:5.5~6,性脆{001}解理完全,贝壳状断口。化学分子式为:(Cr4Fe4Ni)∑9C4,或(Cr,Fe,Ni)∑9C4。六方晶系,空间群:P63/mc,a=18.839(2),c=4.4960(9),V=745.7(2)3,Z=6,计算密度:7.19 g/cm3。雅鲁矿己被国际新矿物命名及矿物分类委员会(CNMMNC)批准为新矿物(IMA2007-035),样品(M11650号)保存在中国地质博物馆。更多还原

【Abstract】 Yarlongite occurs in ophiolitic chromitite at the Luobusha mine(29°5′N 92°5′ E,about 200 km ESE of Lhasa),Qusong County,Tibet Autonomous Region,People’s Republic of China.Associated minerals are: diamond,moissanite,wüstite,iridium("osmiridium"),osmium("iridosmine"),periclase,chromite etc.Associated metallic carbides with yarlongite are cohenite,tongbaite,khamrabaevite and qusongite(IMA2007-034).Yarlongite and its associated minerals were handpicked from a large heavy mineral sample of chromitite.Yarlongite occurs as irregular grains,with a size between 0.02 and 0.06 mm,steel-grey colour.Diaphaneity: opaque.H Mohs: 5.5~6.Tenacity: brittle.Cleavage: {001} perfect.Fracture: conchoidal.Chemical formula:(Cr4Fe4Ni)Σ9C4,or(Cr,Fe,Ni)Σ9C4,Hexagonal,Space Group: P63/mc,a=18.839(2) ,c=4.4960(9) ,V=745.7(2) 3,Z=6,Density(calc.) = 7.19 g/cm3.Yarlongite has been approved as a new mineral by the CNMMNC(IMA2007-035).Holotype material is deposited at the Geological Museum of China(No.M11650).更多还原