Palenzonaite, berzeliite, and manganberzeliite: structural control of (As5+, V5+, Si4+)O4 tetrahedra in garnet structures

Nagashima Mariko, Armbruster  Thomas

doi:10.14824/jakoka.2012.0_81

Bibliographic Information

Other Title

天然パレンツォナ石，ベルゼライト，マンガンベルゼライトの結晶化学：4配位席におけるAs5+, V5+, Si4+のザクロ石構造への影響

Abstract

The crystal chemistry of palenzonaite, berzeliite and manganberzeliite was studied. Simplified formula of these minerals with garnet structures is represented as NaCa₂Y²⁺₂Z⁵⁺₃O₁₂, and tetrahedral V⁵⁺, As⁵⁺ at Z charge balanced by divalent cations at Y and by Na and Ca at X. The <Z-O> and <Y-O> distances show a positive correlation against mean ionic radii of each occupant. However, <X-O> has no correlation in spite of variable (Na, Ca) occupancy. The size of Mg and Mn allows the shared edge of XO₈ and YO₆ to be similar to the unshared edge, which is a measure of lattice distortion in garnet structures.

Journal

Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences

Abstracts for Annual Meeting of Japan Association of Mineralogical Sciences 2012 (0), 81-, 2012

Japan Association of Mineralogical Sciences

Keywords

Details 詳細情報について

CRID: 1390282680521497216

NII Article ID: 130005468453

DOI: 10.14824/jakoka.2012.0_81

Text Lang: ja

Data Source

JaLC
CiNii Articles

Abstract License Flag: Disallowed

Export

Palenzonaite, berzeliite, and manganberzeliite: structural control of (As<sup>5+</sup>, V<sup>5+</sup>, Si<sup>4+</sup>)O<sub>4</sub> tetrahedra in garnet structures