Heimite, PbCu<sub>2</sub>(AsO<sub>4</sub>)(OH)<sub>3</sub> ⋅ 2H<sub>2</sub>O, a new mineral from the Grosses Chalttal deposit, Switzerland

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Abstract 2 (AsO4)(OH) 3  ⋅ 2 O, was found at the Grosses Chalttal deposit, Mürtschenalp district, Glarus, Switzerland, where it occurs as a secondary mineral associated mainly with bayldonite and chrysocolla. Heimite forms lath-like, prismatic transparent crystals of green or pale-blue colour. It has a pale-green streak and a vitreous-to-silky lustre. The calculated density is 4.708 g cm- 3 1.04 Ca0.03 Cu2.10 As1.10 H6.14 O9. Heimite is pseudo-orthorhombic, with monoclinic symmetry; space group P 1/n a = 5.9132 (5), b = 7.8478 (6) and c = 16.8158 (15)  Å and β = 90.007 (6) ∘, V = 780.33 (8)  Å3 and Z = 4. The five strongest lines in the calculated powder diffraction pattern are (d I R 1 = 2.75  % for 1869 reflections with I > 3 σ (I), is based on chains of edge-sharing, Jahn–Teller-distorted CuO6  octahedra, laterally connected by AsO4 tetrahedra and sixfold coordinated Pb atoms. The resulting layers are stacked along [001]. Interlayer hydrogen bonding is mediated by hydrogen atoms that belong to OH groups and to H2 O, mutually participating in the Cu coordination. The crystal structure of heimite is related to that of duftite, and both minerals are found epitactically intergrown at the type locality.

Standort
Deutsche Nationalbibliothek Frankfurt am Main
Umfang
Online-Ressource
Sprache
Englisch

Erschienen in
Heimite, PbCu2(AsO4)(OH)3 ⋅ 2H2O, a new mineral from the Grosses Chalttal deposit, Switzerland ; volume:36 ; number:1 ; year:2024 ; pages:153-164 ; extent:12
European journal of mineralogy ; 36, Heft 1 (2024), 153-164 (gesamt 12)

Urheber
Malcherek, Thomas
Mihailova, Boriana
Schlüter, Jochen
Roth, Philippe
Meisser, Nicolas

DOI
10.5194/ejm-36-153-2024
URN
urn:nbn:de:101:1-2024020103173777142718
Rechteinformation
Open Access; Der Zugriff auf das Objekt ist unbeschränkt möglich.
Letzte Aktualisierung
15.08.2025, 07:20 MESZ

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