First occurrence of the M2a2b2c polytype of argentopolybasite, [Ag6Sb2S7][Ag10S4]: Structural adjustments in the Cu-free member of the pearceite–polybasite group

Bindi, Luca; Keutsch, Frank N.; Topa, Dan; Kolitsch, Uwe; Morana, Marta; Tait, K. T.

doi:10.1180/mgm.2023.30

Cited by 1 publication

(1 citation statement)

References 20 publications

Supporting

Mentioning

Contrasting

Order By: Relevance

“…The discovery of new crystal structures of this type, however, is not restricted to the chemical laboratories. New sulfide phases are being reported from nature, some with previously known and some with novel structures (Kuribayashi et al, 2019;Bindi et al, 2023;Sejkora et al, 2023a, b). The description of new minerals from this group of phases could inspire the development of thermoelectric materials.…”

Section: Introductionmentioning

confidence: 99%

Zipserite, a new bismuth chalcogenide Bi₅(S,Se)₄ from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

Majzlan,

Ozdín,

Sejkora

et al. 2024

MinMag

View full text Add to dashboard Cite

Zipserite is a new mineral species discovered in a sample collected from the old mine dumps of the abandoned epithermal deposit Nagybörzsöny in Hungary. Zipserite occurs as anhedral to subhedral, lath-like grains, up to 500 μm in size, in hydrothermally strongly altered rocks. It is found at a contact between bismuth and bismuthinite, associated also with rare ikunolite and joséite-A. Zipserite is silvery white with metallic luster. Mohs hardness is ca. 2-3, calculated density is 7.815 g.cm -3 . In reflected light, zipserite is grey-white, with color and reflectance essentially matching those of bismuthinite. Bireflectance is weak, internal reflections not present. Anisotropy is moderately strong, with dark blue and grey colors of anisotropy. Reflectance values for the four Commission on Ore Mineralogy wavelengths of zipserite in air [Rmax, Rmin (%) (λ in nm)] are: 48.4, 46.4 (470); 47.8, 45.9 (546); 47.8, 45.8 (589); and 47.5, 45.6 (650). The empirical formula, based on electronmicroprobe analyses, is (Bi4.74Pb0.31)Σ5.05(S3.38Se0.56Te0.02)Σ3.96. that can be simplified as Bi5(S,Se)4. The ideal end-member formula of zipserite is Bi5S4, which requires Bi 89.07 and S 10.93, total 100 wt.%. Zipserite possesses a fascinating crystal structure. The average structure is trigonal, with space group P -3m, a = 4.162(1) Å, c = 16.397(1) Å, V = 245.94(4) Å 3 , and Z = 2. The structure is built by the alternation of double bismuth layer Bi2 and the

show abstract

Section: Introductionmentioning

confidence: 99%

Zipserite, a new bismuth chalcogenide Bi₅(S,Se)₄ from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

Majzlan,

Ozdín,

Sejkora

et al. 2024

MinMag

View full text Add to dashboard Cite

show abstract

First occurrence of the M2a2b2c polytype of argentopolybasite, [Ag₆Sb₂S₇][Ag₁₀S₄]: Structural adjustments in the Cu-free member of the pearceite–polybasite group

Abstract: The chemistry and the crystal structure of the recently described argentopolybasite are critically discussed based on the study of two new occurrences of the mineral (Gowganda,

Cited by 1 publication

References 20 publications

Zipserite, a new bismuth chalcogenide Bi₅(S,Se)₄ from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

Zipserite, a new bismuth chalcogenide Bi₅(S,Se)₄ from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

Contact Info

Product

Resources

About

First occurrence of the M2a2b2c polytype of argentopolybasite, [Ag6Sb2S7][Ag10S4]: Structural adjustments in the Cu-free member of the pearceite–polybasite group

Abstract: The chemistry and the crystal structure of the recently described argentopolybasite are critically discussed based on the study of two new occurrences of the mineral (Gowganda,

Cited by 1 publication

References 20 publications

Zipserite, a new bismuth chalcogenide Bi5(S,Se)4 from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

Zipserite, a new bismuth chalcogenide Bi5(S,Se)4 from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

Contact Info

Product

Resources

About

First occurrence of the M2a2b2c polytype of argentopolybasite, [Ag₆Sb₂S₇][Ag₁₀S₄]: Structural adjustments in the Cu-free member of the pearceite–polybasite group

Zipserite, a new bismuth chalcogenide Bi₅(S,Se)₄ from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure

Zipserite, a new bismuth chalcogenide Bi₅(S,Se)₄ from Nagybörzsöny in Hungary with a R$\bar{3}$m(00γ)00 modulated structure