Crystal structure and genesis of the hydrated analog of rastsvetaevite
Crystal structure and genesis of the hydrated analog of rastsvetaevite
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rassvetaevite 水合类似物的晶体结构和成因
DOI：
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发表时间：
2015
期刊：
影响因子：
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通讯作者：
K. Rozenberg
中科院分区：
文献类型：
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作者：
R. Rastsvetaeva;S. Aksenov;K. Rozenberg
A.P.Khomyakov在Khibiny碱性火山岩（科拉半岛）Rasvumchorr山的超花岗伟晶岩中发现的矿物rastsvetaevite（暂称为“hydrorastsvetaevite”）的水合类似物的晶体结构已由单晶X射线衍射测定。三角晶胞参数为：a = 14.2812（2）μ，c = 60.533（5）μ，V = 10691.54（3）μ 3，sp. gr.R3m.在原子位移参数的各向同性和各向异性近似下，基于2068个反射，|F|> 3σ（F）。“Hydorastsvetaevite”总体上类似于eudialyte组的其他24层代表（称为“megaeudialytes”），但其特点是钾含量高，有别于其他富钾矿物（硅镁石、硅钠石和硅镁石）通过低钠和碱土金属含量，以及通过伴随H3O基团插入的高度水合，其部分或完全取代大的阳离子。“水硬硅镁石”（Z = 3）的理想分子式为（Na 11（H3O）11 K6（H2O）1.5Sr）Ca 12 Fe 3Na2 Mn Zr 6Si 52 O 144（OH）4.5Cl 3.5（H2O）0.5。在碱性伟晶岩中，“水硬硅镁石”是由原始硅镁石通过脱阳离子和水化作用形成的次生矿物。本文从转换矿物种的概念出发，讨论了含钾成种阳离子的常渗析族矿物的成因特征。
米斯||俄文原文© R.K. Rastsvetaeva，S.M. Aksenov，K.A. Rozenberg，2015，发表于Kristallografiya，2015，Vol. 60，No. 6，pp. 897-905.
AbstractThe crystal structure of the hydrated analog of the mineral rastsvetaevite (tentatively called “hydrorastsvetaevite”), which was found by A.P. Khomyakov in ultraagpaitic pegmatites at the Rasvumchorr Mountain of the Khibiny alkaline massif (Kola Peninsula), has been determined by single crystal X-ray diffraction. The trigonal unit-cell parameters are as follows: a = 14.2812(2) Å, c = 60.533(5) Å, V = 10691.54(3) Å3, sp. gr. R3m. The structure was refined to R = 5.9% in the isotropic and anisotropic approximation of atomic displacement parameters based on 2068 ref lections with |F| > 3σ(F). “Hydrorastsvetaevite” is on the whole analogous to other 24-layer representatives of the eudialyte group (called “megaeudialytes”), but is characterized by a high potassium content and is distinguished from other potassium-rich minerals (rastsvetaevite, davinciite, and andrianovite) by low sodium and alkaline-earth metal content, as well as by a high degree of hydration accompanied by the insertion of H3O groups, which partially or completely replace large cations. The idealized formula of “hydrorastsvetaevite” (Z = 3) is (Na11(H3O)11K6(H2O)1.5Sr)Ca12Fe3Na2MnZr6Si52O144(OH)4.5Cl3.5(H2O)0.5. In alkaline pegmatites, “hydrorastsvetaevite” occurs as a secondary mineral developed from the original rastsvetaevite through decationation and hydration. The characteristic features of the genesis of eudialyte-group minerals containing potassium as a species-forming cation are discussed in terms of the concept of transformational mineral species.
an]Mis||Original Russian Text © R.K. Rastsvetaeva, S.M. Aksenov, K.A. Rozenberg, 2015, published in Kristallografiya, 2015, Vol. 60, No. 6, pp. 897–905.
影响因子：
2.7
作者：
J. Schilling;F. Wu;C. McCammon;T. Wenzel;M. Marks;K. Pfaff;D. E. Jacob-;G. Markl
通讯作者：
J. Schilling;F. Wu;C. McCammon;T. Wenzel;M. Marks;K. Pfaff;D. E. Jacob-;G. Markl