Crystal structure of barstowite (3PBCl2·PbCO3·H2O)

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doi: 10.1180/002646199549005
Authors:Steele, L. M.; Pluth, J. J.; Stanley, C. J.
Author Affiliations:Primary:
University of Chicago, Department of Geophysical Sciences, Chicago, IL, United States
Other:
Natural History Museum, United States
Volume Title:Mineralogical Magazine
Source:Mineralogical Magazine, 63(6), p.901-907. Publisher: Mineralogical Society, London, United Kingdom. ISSN: 0026-461X
Publication Date:1999
Note:In English. 5 refs.; illus., incl. 4 tables
Summary:The crystal structure of barstowite (3PbCl2·PbCO3·H2O, P21/m, a = 4.2023(5), b = 9.2020(7), c = 16.6608(6) (Å), β = 91.829(9)°) from Bounds Cliff, St Endellion, Cornwall, has been determined to an R = 0.036. The structure can be described in terms of three layers stacked along [001] in the sequence ...CACBCACBC... to give a 16.7 Å repeat. Layer A consists of face-sharing PbCl8 distorted square antiprisms. Layer B is composed of Pb coordinated to 5 Cl and 2 O each with two H to form H2O groups. Layer C is formed by Pb coordinated to 5 Cl and 3 O which are from CO3 groups. The H positions are deduced and are H-bonded to O from carbonates. The structural details were in agreement with previous deductions based on infrared spectra. [R.A.H.]
Sections:Crystal structure
Subsections:Specific structures: non-silicates
Subjects:Anisotropy; Carbonates; Chlorides; Crystal structure; Formula; Halides; Infrared spectra; Phosgenite; Spectra; Stacking; Cornwall England; England; Europe; Great Britain; United Kingdom; Western Europe; Barstowite; Bounds Cliff
Abstract Numbers:00M/1312
Record ID:2000026820
Copyright Information:GeoRef, Copyright 2019 American Geosciences Institute.
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