Crystal structure and chemistry of natural kutinaite from Černý Důl, Krkonoše, Czech Republic

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Crystal structure and chemistry of natural kutinaite from Černý Důl, Krkonoše, Czech Republic. / Bindi, Luca; Makovicky, Emil.

I: Mineralogical Magazine, Bind 79, Nr. 5, 2015, s. 1099-1109.

Publikation: Bidrag til tidsskrift › Tidsskriftartikel › Forskning › fagfællebedømt

Harvard

Bindi, L & Makovicky, E 2015, 'Crystal structure and chemistry of natural kutinaite from Černý Důl, Krkonoše, Czech Republic', Mineralogical Magazine, bind 79, nr. 5, s. 1099-1109. https://doi.org/10.1180/minmag.2015.079.5.06

APA

Bindi, L., & Makovicky, E. (2015). Crystal structure and chemistry of natural kutinaite from Černý Důl, Krkonoše, Czech Republic. Mineralogical Magazine, 79(5), 1099-1109. https://doi.org/10.1180/minmag.2015.079.5.06

Vancouver

Bindi L, Makovicky E. Crystal structure and chemistry of natural kutinaite from Černý Důl, Krkonoše, Czech Republic. Mineralogical Magazine. 2015;79(5):1099-1109. https://doi.org/10.1180/minmag.2015.079.5.06

Author

Bindi, Luca ; Makovicky, Emil. / Crystal structure and chemistry of natural kutinaite from Černý Důl, Krkonoše, Czech Republic. I: Mineralogical Magazine. 2015 ; Bind 79, Nr. 5. s. 1099-1109.

Bibtex

@article{18b9ab3b7a52430e83ce9c639568b4ac,
title = "Crystal structure and chemistry of natural kutinaite from {\v C}ern{\'y} Důl, Krkono{\v s}e, Czech Republic",
abstract = "We have characterized the crystal structure of natural kutinaite, a rare mineral from the ores of {\v C}ern{\'y} Důl, Czech Republic, by single-crystal X-ray diffraction and chemical analysis. We found that the structure of natural kutinaite is not identical to that of synthetic Cu14Ag6As7, previously reported to be cubic, space group Pm3m. Although topologically similar, the structure of natural kutinaite is indeed tetragonal, space group P4/mmm, with cell parameters: a = 11.789(2), c = 11.766(2) {\AA}, V = 1635.5(4) {\AA}3 and Z = 4. Electron microprobe analyses pointed to the (K,Tl)0.25Cu14Ag6As6.75 stoichiometry (Z = 4), or (K, Tl)Cu56Ag24As27 with Z = 16. The crystal structure of an untwinned crystal has been refined to R 1 = 2.61%. It consists of clusters of eight edge-sharing tetrahedra of Cu, which alternate in a 3D chess-board manner with octahedral clusters of six Ag atoms. The latter are surrounded by triangularly coordinated copper in eight faces of a cuboctahedron. The last structure components are large cavities containing partly occupied (K,Tl) sites, coordinated by 18 Ag and As ligands. The structure is full of direct metal-metal contacts although As plays the role of anion, associating especially with copper.",
author = "Luca Bindi and Emil Makovicky",
year = "2015",
doi = "10.1180/minmag.2015.079.5.06",
language = "English",
volume = "79",
pages = "1099--1109",
journal = "Mineralogical Magazine",
issn = "0026-461X",
publisher = "Mineralogical Society",
number = "5",

}

RIS

TY - JOUR

T1 - Crystal structure and chemistry of natural kutinaite from Černý Důl, Krkonoše, Czech Republic

AU - Bindi, Luca

AU - Makovicky, Emil

PY - 2015

Y1 - 2015

N2 - We have characterized the crystal structure of natural kutinaite, a rare mineral from the ores of Černý Důl, Czech Republic, by single-crystal X-ray diffraction and chemical analysis. We found that the structure of natural kutinaite is not identical to that of synthetic Cu14Ag6As7, previously reported to be cubic, space group Pm3m. Although topologically similar, the structure of natural kutinaite is indeed tetragonal, space group P4/mmm, with cell parameters: a = 11.789(2), c = 11.766(2) Å, V = 1635.5(4) Å3 and Z = 4. Electron microprobe analyses pointed to the (K,Tl)0.25Cu14Ag6As6.75 stoichiometry (Z = 4), or (K, Tl)Cu56Ag24As27 with Z = 16. The crystal structure of an untwinned crystal has been refined to R 1 = 2.61%. It consists of clusters of eight edge-sharing tetrahedra of Cu, which alternate in a 3D chess-board manner with octahedral clusters of six Ag atoms. The latter are surrounded by triangularly coordinated copper in eight faces of a cuboctahedron. The last structure components are large cavities containing partly occupied (K,Tl) sites, coordinated by 18 Ag and As ligands. The structure is full of direct metal-metal contacts although As plays the role of anion, associating especially with copper.

AB - We have characterized the crystal structure of natural kutinaite, a rare mineral from the ores of Černý Důl, Czech Republic, by single-crystal X-ray diffraction and chemical analysis. We found that the structure of natural kutinaite is not identical to that of synthetic Cu14Ag6As7, previously reported to be cubic, space group Pm3m. Although topologically similar, the structure of natural kutinaite is indeed tetragonal, space group P4/mmm, with cell parameters: a = 11.789(2), c = 11.766(2) Å, V = 1635.5(4) Å3 and Z = 4. Electron microprobe analyses pointed to the (K,Tl)0.25Cu14Ag6As6.75 stoichiometry (Z = 4), or (K, Tl)Cu56Ag24As27 with Z = 16. The crystal structure of an untwinned crystal has been refined to R 1 = 2.61%. It consists of clusters of eight edge-sharing tetrahedra of Cu, which alternate in a 3D chess-board manner with octahedral clusters of six Ag atoms. The latter are surrounded by triangularly coordinated copper in eight faces of a cuboctahedron. The last structure components are large cavities containing partly occupied (K,Tl) sites, coordinated by 18 Ag and As ligands. The structure is full of direct metal-metal contacts although As plays the role of anion, associating especially with copper.

U2 - 10.1180/minmag.2015.079.5.06

DO - 10.1180/minmag.2015.079.5.06

M3 - Journal article

VL - 79

SP - 1099

EP - 1109

JO - Mineralogical Magazine

JF - Mineralogical Magazine

SN - 0026-461X

IS - 5

ER -

ID: 160086141