CRYSTAL CHEMISTRY OF HIGH-PRESSURE BASI4O9 IN THE TRIGONAL (P3) BARIUM TETRAGERMANATE STRUCTURE

dc.contributor.author	Hazen R.M.
dc.contributor.author	Yang H.
dc.contributor.author	Finger L.W.
dc.contributor.author	Fursenko B.A.
dc.date.accessioned	2021-01-11T07:47:35Z
dc.date.available	2021-01-11T07:47:35Z
dc.date.issued	1999
dc.identifier	https://elibrary.ru/item.asp?id=13309983
dc.identifier.citation	American Mineralogist, 1999, , 5, 987-989
dc.identifier.issn	0003-004X
dc.identifier.uri	https://repository.geologyscience.ru/handle/123456789/22619
dc.description.abstract	Crystals of BaSi4O9 synthesized at 4 GPa and 1000 degrees C were determined to be isostructural with barium tetragermanate [trigonal, space group P3, a = 11.2469(11) and c = 4.4851(6) Aa, V = 491.3(1) Aa 3 ]. The structure (R = 2.4%) features a corner-linked framework of three-member silicate tetrahedral rings, which are cross-linked by isolated silicate octahedra. Ba cations occupy tenfold-coordinated sites in channels defined by the silicate framework. This structure is 4.2% denser than the topologically similar benitoite form of high-pressure BaSi 4 O 9 , which was produced by grinding the barium tetragermanate-type crystals described in this report.
dc.title	CRYSTAL CHEMISTRY OF HIGH-PRESSURE BASI4O9 IN THE TRIGONAL (P3) BARIUM TETRAGERMANATE STRUCTURE
dc.type	Статья

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