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GEOREF RECORD

Pb (sub 2) Fe (super 3+) Cl (sub 3) (OH) (sub 4) .H (sub 2) O, a newly discovered natural phase from Tuscany, Italy; physico-chemical data, crystal structure, and OD character

Marco Pasero, Natale Perchiazzi, Simona Bigi, Marco Franzini and Stefano Merlino
Pb (sub 2) Fe (super 3+) Cl (sub 3) (OH) (sub 4) .H (sub 2) O, a newly discovered natural phase from Tuscany, Italy; physico-chemical data, crystal structure, and OD character
European Journal of Mineralogy (February 1997) 9 (1): 43-51

Abstract

A natural phase with formula Pb (sub 2) Fe (super 3+) Cl (sub 3) (OH) (sub 4H) (sub 2) O, space group P2 (sub 1) , a 8.033, b 6.253, c 9.221 Aa, beta 102.98 degrees was recently discovered in the Etruscan slags of Baratti. It falls in the category of 'geologically modified anthropogenic substances' and therefore cannot be regarded as a new mineral. It has alpha (straw yellow) 1.93, beta V>calc (light yellow) 1.95, Gamma V>calc 1.98, 2V<F128MV>g<F255D> 73 degrees , Gamma :c + 13 degrees ; twinning on (001) is ubiquitous. Strongest XRD powder lines are 5.13(S), 3.368(mS), 2.467(m), 2.447(m), 2.115(m) Aa. The structure was solved and refined to R 0.082, revealing a novel structure type, in which layers of face-sharing [PbX (sub 9) ] polyhedra alternate with layers containing columns of edge-sharing [Fe(OH) (sub 6) ] octahedra and structural voids.


ISSN: 0935-1221
Serial Title: European Journal of Mineralogy
Serial Volume: 9
Serial Issue: 1
Title: Pb (sub 2) Fe (super 3+) Cl (sub 3) (OH) (sub 4) .H (sub 2) O, a newly discovered natural phase from Tuscany, Italy; physico-chemical data, crystal structure, and OD character
Affiliation: Universita di Pisa, Dipartimento di Scienze della Terra, Pisa, Italy
Pages: 43-51
Published: 199702
Text Language: English
Publisher: Schweizerbart'sche Verlagsbuchhandlung (Naegele u. Obermiller), Stuttgart, Federal Republic of Germany
References: 24
Accession Number: 1997-030090
Categories: Mineralogy of non-silicates
Document Type: Serial
Bibliographic Level: Analytic
Illustration Description: 5 tables
N42°19'60" - N44°19'60", E09°40'00" - E12°25'00"
Secondary Affiliation: Universita di Modena, 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: 199710
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