摘要
柱磷锶锂矿与磷铝钙锂石是一完全类质同象系列(Sr、Ca)的两个端元矿物,二者在自然界都十分罕见,仅少量产于花岗伟晶岩中,所报道的产地也廖廖无几。笔者于1985年在福建南平花岗伟晶岩田的白云母-钠长石-锂辉石型伟晶岩中发现了这两种矿物。二者在国内均属首次发现。本文详细地报道了南平柱磷锶锂矿-磷铝钙锂石的产状、物理性质、化学成分、X射线衍射特征及矿物晶胞参数等。研究指出:南平柱磷锶锂矿是伟晶岩中原生大块体羟磷铝锂石的交代蚀变产物;而磷铝钙锂石则是次生矿物光彩石的蚀变产物。
It is believed that palermoite-bertossaite is a perfect Sr-Ca isomorphic series with achemical formula of Li_2(Sr,Ca)Al_4[PO_4]_4(OH)_4.Palermoite and bertossaite are of littleoccurrence in nature.Both the minerals are discovered only in granitic pegmatites.The au-thors are luck enough to have found them in an extremely differentiated granitic pegmatitevein in the Nanping pegmatite field,Fujian in 1985.It is the first time that both the mineralshave been found in China as the second occurrence in the world.Their occurrence, physicaland optical properties,chemical compositions, X-ray diffraction patterns and cell parametersare discribed in the pegmatite:while bertossaite is the alteration product of augelite whichis of alteration origin.Differences in physical and chemical properties of these two mineralshave also been demonstrated.The X-ray diffraction patterns in the minerals are generallycongruent with those in American palermoite.The measurement of cell dimensions showsthat the palermoite has a larger cell volume than the bertossaite.
出处
《矿物学报》
CAS
CSCD
北大核心
1993年第4期346-353,共8页
Acta Mineralogica Sinica
关键词
柱磷锶锂矿
花岗伟晶岩
伟晶岩
palermoite
bertossaite
granitic pegmatite
isomorphism
Fujian
