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Beraunite and Its Team: the History of Discovery of a New Mineral Eleonorite
 
PIIS0032874X0003327-8-1
DOI10.31857/S0032874X0003327-8
Publication type Article
Status Published
Authors
Ramiza Rastsvetaeva 
Affiliation: A.V.Shubnikov Institute of Cristallography, RAS
Address: Russian Federation, Moscow
Sergey Aksenov
Affiliation: A.V.Shubnikov Institute of Cristallography, RAS
Address: Russian Federation, Moscow
Journal namePriroda
EditionIssue №12
Pages12-20
Abstract

Many phosphate minerals have iron in their composition. Iron atoms form octahedra which are combined into three-dimensional structures using phosphoric P#tetrahedra. Mostly Fe#octahedra are isolated from each other but in some minerals they can be combined by corners or edges, forming clusters or chains. The most stable groups are linear octahedral trimers. They are complicated by four cornersharing octahedra, so-called “h-clusters”. A lot of various structures of different types are forming from these clusters, and minerals and with different composition of octahedra are included in the structural type of beraunite. The studied by us eleonorite Fe6 3+(PO4)4O(OH)4·6H2O from the Rotläufchen mine (Germany) is among them. Eleonorite is a new “transformational” mineral formed as a result of natural solidstate oxidation of beraunite and is its Fe3+-analogous.

Keywordseleonorite, beraunite, beraunite group, ferriс phosphates, single crystal X-ray analysis, crystal structure, h-cluster
Received11.01.2019
Publication date14.01.2019
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