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Die Bestimmung der Kristallstruktur von Trimerit CaMn2(BeSiO4)3 und das Trimeritgesetz der Verzwillingung
Published/Copyright:
July 28, 2010
Abstract
The crystal structure of the mineral trimerite was determined and refined to R = 0.033. The crystals are monoclinic, space group P21/n, with four formula units per unit cell of the dimensions: a = 8.098 Å, b = 7.613 Å, c = 14.065 Å, β = 90°. The crystals are triple twins with composition planes (110) and (1[unk]0). An interpretation is given by aid of the crystal structure.
Trimerite is composed of an ordered Be,Si tetrahedral framework with two different sorts of channels in the direction of the b axis containing the Ca and Mn cations. The structure is derived from the beryllonite structure.
Published Online: 2010-07-28
Published in Print: 1977
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Articles in the same Issue
- Zeitschrift für Kristallographie 1877–1977
- The Zeitschrift für Kristallographie and Professor Dr. G. Menzer
- Die Molekular- und Kristallstruktur von N,N′-Disalicyliden-meso-1,2-diphenyläthylendiamin*
- Quadratischer elektrooptischer Tensor des rhombischen Calciumformiats
- Die Kristallstruktur von Cu2As3O6CH3COO
- Die Bestimmung der Kristallstruktur von Trimerit CaMn2(BeSiO4)3 und das Trimeritgesetz der Verzwillingung
- Powder data for the chlorine derivatives of C.I. Pigment Red 9 and C.I. Pigment Brown 1
- Nyerereite: a new volcanic carbonate mineral from Oldoinyo Lengai, Tanzania
- The magnetic structures of NiWO4 and CoWO4
- A study of the structural chemistry of coesite
- Crystal structure of a synthetic, compositionally intermediate, hypersolvus alkali feldspar: evidence for Na, K site ordering
- Twinning and disorder in zinc perchlorate hexahydrate crystals
- Crystal data for the polymethine dye 1,3-bis (dimethylamino)-trimethinium perchlorate
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