The crystal structure of Sr-hardystonite, Sr2ZnSi2O7

被引：15

作者：

Ardit, Matteo ^{[1
]}

Cruciani, Giuseppe ^{[1
]}

Dondi, Michele ^{[2
]}

机构：

[1] Univ Ferrara, Dept Earth Sci, I-44100 Ferrara, Italy

[2] CNR, ISTEC, I-48018 Faenza, Italy

来源：

ZEITSCHRIFT FUR KRISTALLOGRAPHIE-CRYSTALLINE MATERIALS | 2010年 / 225卷 / 07期

关键词：

Melilites; Hardystonite; X-ray diffraction; Rietveld refinement; Powder diffraction structure analysis; INCOMMENSURATE PHASE-TRANSITION; AKERMANITE; MELILITE; CA2MGSI2O7; DISTORTION; GEHLENITE;

D O I：

10.1524/zkri.2010.1256

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

A synthetic strontium isomorph (Sr2ZnSi2O7) of the hardystonite structure (Ca2ZnSi2O7) was investigated with X-ray powder diffraction. The average structure (S.G. P (4) over bar2(1)m), a = 8.0007(1) angstrom, c = 5.1722(1) angstrom, was refined by Rietveld method and a R-F(2) = 0.0216 was achieved using 394 independent reflections. The results show that Sr-hardystonite has a melilite-type structure with no incommensurate modulations. Its geometrical and bonding features are consistent with trends defined by the other so-called normal and modulated melilite structures.

引用

页码：298 / 301

页数：4

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