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Stibiogoldfieldite

Additional Functions

Collectors Summary

Color

dunkelgrau

Crystal System

kubisch, I43m

Morphology

metallische anedrische Körner

Chemism

Chemical formula

Cu₆Cu₆(Sb₂Te₂)S₁₃

Empirical formula (analysis)

(Cu_12.05Ag_0.04Zn_0.03Fe_0.01)_Σ12.13(Sb_1.12As_0.63Bi_0.23Te_2.02)_Σ4.00(S_12.99Se_0.11)_Σ13.10

Chemical composition

Antimon, Kupfer, Tellur, Schwefel

Unit weight: 1687.18062192 u; Number of atoms in the formula: 29.23

Info

Empirical formula:

(Cu_12.05Ag_0.04Zn_0.03Fe_0.01)(Sb_1.12As_0.63Bi_0.23Te_2.02)(S_12.99Se_0.11)

Element	Symbol	Weight%	Atoms	Atoms%	Atom weight (u)	Sum weight (u)
Sulfur	S	24.69	12.99	44.44	32.0655000	416.5308450
Iron	Fe	0.03	0.01	0.03	55.8452000	0.5584520
Copper	Cu	45.39	12.05	41.22	63.5463000	765.7329150
Zinc	Zn	0.12	0.03	0.10	65.4094000	1.9622820
Arsenic	As	2.80	0.63	2.16	74.9216020	47.2006093
Selenium	Se	0.51	0.11	0.38	78.9630000	8.6859300
Silver	Ag	0.26	0.04	0.14	107.8682200	4.3147288
Antimony	Sb	8.08	1.12	3.83	121.7601000	136.3713120
Tellurium	Te	15.28	2.02	6.91	127.6030000	257.7580600
Bismuth	Bi	2.85	0.23	0.79	208.9803820	48.0654879

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Analysis wt%

Cu 45.03(60),
Ag 0.26(7),
Fe 0.02(3),
Zn 0.13(15),
Sn 0.02(4),
Pb 0.05(6),
Sb 8.02(62),
As 2.80(65),
Bi 2.77(87),
Te 15.15(1.24),
S 24.50(32),
Se 0.52(11),
Total 99.27(69)

IMA status

anerkannt - CNMNC Newsletter 61, April - Mai 2021

Mineral status

anerkanntes Mineral

IMA Classification

Tetrahedrite Group ⇒ Goldfieldit-Serie

Optical Properties

Color	dunkelgrau
Anisotropism	Im reflektierten Licht ist Stibiogoldfieldit isotrop, von grauer Farbe mit undeutlichen bräunlichen Schattierungen
Reflectivity: (Lambda nm) ↓, ↑, Ø	(470) 31.10, , 31.10 (546) 30.90, , 30.90 (589) 30.80, , 30.80 (650) 31.00, , 31.00

Reflectivity Ø	30.95

Crystallography

Crystal System	kubisch
Class (H-M)	43m
Space Group number	217
Space Group	I43m
Cell parameters a (Å)	10.3466(17)
Cell parameters b (Å)	-
Cell parameters c (Å)	-
Cell parameters a/b or c/a	1
Cell parameters c/b	-
Cell parameters α	90°
Cell parameters β	90°
Cell parameters γ	90°
Z	2
Volume (Å³)	1107.626
Crystal structure	Tetraedrit-Gruppe; Struktur ermittelt
X-Ray Powder Diffraction	3.644(19), 2.974(100), 2.754(8), 2.576(19), 2.429(7), 2.020(10), 1.821(32), 1.553(13)
	Calculated from d-spacing and intensity at 0.1541838 nm (Cu)
Morphology	metallische anedrische Körner

Physical Properties

Density (g/cm³)
	5.058 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality	USA /Nevada /Esmeralda County /Goldfield District /Mohawk Mine
Type material	Das Typusmaterial ist hinterlegt in den mineralogischen Sammlungen des Museo di Storia Naturale, Università di Pisa, Via Roma 79, Calci (PI), Italien, Katalognummer 19926 (Holotypus), und der Abteilung für Mineralogie und Petrologie, Nationalmuseum in Prag, Cirkusová 1740, 19300 Prag 9, Tschechische Republik, Katalognummern P1P 78
Paragenesis of type material	Quarz, Pyrit und eine Ag-Bi-(S,Se) Phase (Holotyp-Material) und mit Quarz, Pyrit, Calaverit, Bismuthinit, Bohdanowiczit, und einer Ag-Bi-(S,Se) Phase (Cotyp-Material)

Preface

Author (Name, Year)

Cristian Biagioni, Jiri Sejkora, Silvia Musetti, Emil Makovicky, Renato Pagano, Marco Pasero, und Zdeněk Dolníček (2022)

References

Biagioni, C., Sejkora, J., Musetti, S., Makovicky, E., Pagano, R., Pasero, M., and Dolníček, Z.: Stibiogoldfieldite, IMA 2020-104, in: CNMNC Newsletter 61, Eur. J. Mineral., 33, https://doi.org/10.5194/ejm-33-299-2021, 2021.

Biagioni, C., Sejkora, J., Musetti, S., Makovicky, E., Pagano, R., Pasero, M., Dolníček, Z. (2022): Stibiogoldfieldite, Cu12(Sb2Te2)S13, a new tetrahedrite group mineral. Mineralogical Magazine Vol. 86, Nr. 1 (2022) S. 168-175.

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