Abstract

The rare beryllium silicate, meliphanite, from nepheline syenite pegmatite of the Sakharjok massif, Kola Peninsula has been studied. The chemical composition of the mineral has been refined using infrared and Raman spectroscopy; bulk chemical, thermal, and electron microprobe analyses; and singe crystal X-ray diffraction. The obtained data unambiguously support the presence of H₂O in the mineral and refine the crystal chemical formula of meliphanite from Sakharjok: Ca_4.00(Na_3.12Ca_0.88)_Σ4.00(Be_3.60Si_0.40)_Σ4.00Al_1.00(Si_6.74Be_0.26)_Σ7.00O_24.00[F_3.33(OH)_0.51O_0.16]_Σ4.00.

中文翻译：

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从可乐半岛Sakharjok地块的霞石正长岩伟晶石中脱硫石的组成

摘要

研究了可乐半岛Sakharjok地块的霞石正长伟晶岩中的稀有硅酸铍，变锰矿。矿物的化学成分已使用红外和拉曼光谱法精制；大量化学，热和电子探针分析；和单晶X射线衍射。所获得的数据清楚地支持H的存在₂中的O矿物和细化从Sakharjok meliphanite的晶体化学式为Ca _4.00（钠_3.12的Ca _0.88）_Σ4.00（成为_3.60的Si _0.40）_Σ4.00的Al _1.00（SI _6.74是_0.26）_Σ7.00O _24.00 [F _3.33（OH）_0.51 O _0.16 ] _Σ4.00。