Rudabányaite, a new mineral with a [Ag2Hg2]4+ cluster cation from the Rudabánya ore deposit (Hungary)

Effenberger, H.; Szakáll, Sándor; Fehér, Béla; Zajzon, Norbert

doi:10.1127/ejm/2019/0031-2830

Cited by 3 publications

(1 citation statement)

References 36 publications

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“…Also, cubic rudabanyaite, (Ag2Hg2)(AsO4)Cl (Effenberger et al, 2019) can be viewed as a related mineral species but is structurally completely different. Its crystal structure is a framework based on by two crystallographically different [M4] 4+ cluster cations forming tetrahedra (M = (Ag,Hg) with a ratio Ag:Hg ~ 1:1), with no evidence for ordering between the Ag and Hg atoms.…”

Section: Related Minerals and Structuresmentioning

confidence: 99%

Theuerdankite, Ag₃AsO₄, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany

Plášil,

Sejkora,

Dolníček

et al. 2024

MinMag

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The new mineral theuerdankite, ideally Ag3AsO4, was found in the Alter Theuerdank Mine, Beerberg, St. Andreasberg, Goslar District, Lower Saxony, Germany. Theuerdankite occurs as aggregates of anhedral grains up to 3 mm in size, growing in cavities of strongly supergene-weathered material consisting of native silver and chlorargyrite (but with calcite present). It is dark violet, changing to reddish and black when exposed to the air and light. It has a grey to violet grey streak; when readily fresh, its streak is brownish-red. The Mohs hardness is about 2. It is brittle without any observable cleavage or parting and with a conchoidal fracture. The calculated density is 6.622 g•cm -3 . In reflected light, theuerdankite is dark grey with a pinkish tint, without any observable bireflectance, pleochroism, or anisotropy. It shows dark red internal reflections. The reflectance values for wavelengths recommended by the Commission on Ore Mineralogy of the IMA are (R %): 13.3 (470 nm), 12.8 (546 nm), 12.7 (589 nm), 12.5 (650 nm). The empirical formula (based on 4 apfu) is Ag3.00As1.00O4. Theuerdankite is cubic, space group P-43n, a = 6.144(2) Å, V = 231.93(13) Å 3 and Z = 2. The six strongest X-ray powder diffraction lines are [dobs in Å, (I), hkl]:

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Section: Related Minerals and Structuresmentioning

confidence: 99%

Theuerdankite, Ag₃AsO₄, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany

Plášil,

Sejkora,

Dolníček

et al. 2024

MinMag

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Notizen aus der Chemie

Delaittre¹,

Heine²,

Hoch³

et al. 2019

Nachr Chem

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The Discovery of New Minerals in Modern Mineralogy: Experience, Implications and Perspectives

Pekov

Pushcharovsky

2023

Springer Mineralogy

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Rudabányaite, a new mineral with a [Ag2Hg2]4+ cluster cation from the Rudabánya ore deposit (Hungary)

Cited by 3 publications

References 36 publications

Theuerdankite, Ag₃AsO₄, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany

Theuerdankite, Ag₃AsO₄, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany

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The Discovery of New Minerals in Modern Mineralogy: Experience, Implications and Perspectives

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Rudabányaite, a new mineral with a [Ag2Hg2]4+ cluster cation from the Rudabánya ore deposit (Hungary)

Cited by 3 publications

References 36 publications

Theuerdankite, Ag3AsO4, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany

Theuerdankite, Ag3AsO4, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany

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The Discovery of New Minerals in Modern Mineralogy: Experience, Implications and Perspectives

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Theuerdankite, Ag₃AsO₄, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany

Theuerdankite, Ag₃AsO₄, a new mineral from the Alter Theuerdank Mine (St. Andreasberg), Germany