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GEOREF RECORD

Weinebeneite, CaBe (sub 3) (PO (sub 4) ) (sub 2) (OH) (sub 2) . 4H (sub 2) O, a new mineral species; mineral data and crystal structure

Franz Walter
Weinebeneite, CaBe (sub 3) (PO (sub 4) ) (sub 2) (OH) (sub 2) . 4H (sub 2) O, a new mineral species; mineral data and crystal structure
European Journal of Mineralogy (December 1992) 4 (6): 1275-1283

Abstract

Weinebeneite occurs in small fractures in a spodumene pegmatite at Weinebene, in high-grade metamorphic rocks of Koralpe, Carinthia, Austria; it is associated with fairfieldite, roscherite and uralolite. It forms colourless, platy crystals < or = 0.1 X 0.3 X 0.5 mm surrounding rosettes of xenomorphic weinebeneite < or = 20 mm; H. 3-4, D 2.15 g/cm (super 3) (D (sub calc) 2.17 g/cm (super 3) ); alpha 1520, beta 1.520, gamma 1.530, 2V (sub gamma) 10 degrees, gamma:c 42 degrees in acute beta . Indexed powder XRD data are tabulated; strongest lines 2.513(100), 3.421(70), 5.92(60), 2.959(60), 4.33(49) Angstrom ; a 11.897, b 9.707, c 9.633 Angstrom, beta 95.76 degrees ; space group Cc; Z = 4. EPMA, AAS and structural analyses lead to the idealized formula CaBe (sub 3) (PO (sub 4) ) (sub 2) (OH) (sub 2) bullet 4H (sub 2) O. Weinebeneite is a framework beryllophosphate with Ca and H (sub 2) O molecules in the cavities of the structure. The Be- and P-tetrahedra share corners, forming a layer of four and eight rings. Two superimposed 4.8 (super 2) 2D nets [A.M. 63-960] oriented (100) and related by translation in b/2 are connected by additional Be tetrahedra giving a framework with an unusual arrangement in which five tetrahedra in two three-membered rings share a tetrahedron. Ca is located in channels [001], coordinated by three O atoms of the framework and four water molecules, one of which displays apparent positional disorder over two sites.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 4
Serial Issue: 6
Title: Weinebeneite, CaBe (sub 3) (PO (sub 4) ) (sub 2) (OH) (sub 2) . 4H (sub 2) O, a new mineral species; mineral data and crystal structure
Author(s): Walter, Franz
Affiliation: Institut fuer Mineralogie-Kristallographie und Petrologie der Karl-Franzens-Universitaet Graz, Graz, Austria
Pages: 1275-1283
Published: 199212
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 32
Accession Number: 1995-056247
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: illus. incl. 7 tables
N46°30'00" - N47°00'00", E12°30'00" - E15°00'00"
N46°34'60" - N47°00'00", E14°52'00" - E15°10'00"
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199520
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