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GEOREF RECORD

Rosenbergite, AlF[F (sub 0.5) (H (sub 2) O) (sub 0.5) ] (sub 4) .H (sub 2) O, a new mineral from the Cetine Mine (Tuscany, Italy); description and crystal structure

Filippo Olmi, Cesare Sabelli and Renza Trosti-Ferroni
Rosenbergite, AlF[F (sub 0.5) (H (sub 2) O) (sub 0.5) ] (sub 4) .H (sub 2) O, a new mineral from the Cetine Mine (Tuscany, Italy); description and crystal structure
European Journal of Mineralogy (December 1993) 5 (6): 1167-1174

Abstract

Rosenbergite occurs as radiating tufts of slender tetragonal crystals, elongated on [001], in cavities in a highly silicified limestone, in association with gypsum, fluorite, elpasolite, ralstonite and onoratoite. It is colourless and transparent, with a vitreous lustre; epsilon 1.403, omega 1.427; VHN (sub 15) 103, D 2.10 g/cm (super 3) . Indexed XRD powder data are tabulated; strongest lines 5.47(100), 1.725(85), 1.775(78), 2.027(70), 1.306(70) Angstrom ; a 7.715, c 3.648; space group P4/n; Z = 2. EPMA (H (sub 2) O by difference) gave Al (sub 1.02) F (sub 2.98) bullet 2.99H (sub 2) O, or ideally AlF (sub 3) bullet 3H (sub 2) O; the IR spectrum is also given. The crystal structure was refined to R 0.0186, and consists of chains of corner-linked Al[(F (sub 4) (H (sub 2) O) (sub 2) ] octahedra [001] and isolated water molecules; a dense network of hydrogen bonds connects the Al-F chains.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 5
Serial Issue: 6
Title: Rosenbergite, AlF[F (sub 0.5) (H (sub 2) O) (sub 0.5) ] (sub 4) .H (sub 2) O, a new mineral from the Cetine Mine (Tuscany, Italy); description and crystal structure
Affiliation: C.N.R. Centro di studio per la Minerogenesi e la Geochimica Applicata, Florence, Italy
Pages: 1167-1174
Published: 199312
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 16
Accession Number: 1994-001552
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: 3 tables
N42°19'60" - N44°19'60", E09°40'00" - E12°25'00"
Secondary Affiliation: Universita degli Studi di Firenze, ITA, Italy
Country of Publication: Germany
Secondary Affiliation: GeoRef, Copyright 2017, American Geosciences Institute. Reference includes data from Mineralogical Abstracts, United KingdomTwickenhamUKUnited Kingdom
Update Code: 199401
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