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Trigodomeykite

Additional Functions


You find additional specimen at the Geolitho Museum

Collectors Summary

Hardness (Mohs) 3.5
Solubility +++ HNO3, - HCl

Chemism

Chemical formula

Cu3As

Chemical composition

Arsen, Kupfer

Unit weight: 265.560502 u; Number of atoms in the formula: 4

Info

Empirical formula:

Cu3As

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Copper

Cu

71.79

3

75.00

63.5463000

190.6389000

Arsenic

As

28.21

1

25.00

74.9216020

74.9216020

Analysis wt%

Cu : 71.79, As : 28.21 (Ref: berechnet)

Strunz 9th edition incl. updates

2.AA.10

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
A: Legierungen und legierungsartige Verbindungen
A: Verbindungen von Halbmetallen mit Kupfer (Cu), Silber (Ag), Gold (Au)
10:Domeykit-Gruppe

Lapis Classification

II/A.01-025

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
A: Legierungen und legierungsartige Verbindungen
1: mit Kupfer, Silber, Gold und Nickel

Classification by Hölzel

2.AA.135

2: SULFIDES
A: Alloys of Cu,Ag,Au,Ni,Pd with As,Sb,Bi,(Te)
A: With Cu,Ag,Au
1: Algondonite-Domeykite-Group

IMA status

neu definiert anerkannt durch die CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Reflectivity: (Lambda nm) ↓, ↑, Ø

(400) 37.20, 38.50, 37.85
(420) 37.90, 39.50, 38.70
(440) 38.60, 40.90, 39.75
(460) 40.20, 43.10, 41.65
(480) 42.40, 45.50, 43.95
(500) 44.20, 47.30, 45.75
(520) 45.40, 48.60, 47.00
(540) 45.90, 49.40, 47.65
(560) 45.90, 49.60, 47.75
(580) 45.80, 49.70, 47.75
(600) 45.50, 49.50, 47.50
(620) 45.20, 49.20, 47.20
(640) 44.80, 48.90, 46.85
(660) 44.40, 48.40, 46.40
(680) 44.00, 48.00, 46.00
(700) 43.60, 47.60, 45.60

Reflection chart Trigodomeykite

Reflectivity Ø

44.83

Crystallography

Cell parameters a (Å)

7.13

Cell parameters b (Å)

-

Cell parameters c (Å)

7.3

Cell parameters a/b or c/a

1.021

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

6

Volume (ų)

316.5

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

132 (100g)

Density (g/cm³)

8.13 (berechnet) 7.6 (gemessen)

8.359 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3, - HCl

References

IMA 08-B β-DOMEKYITE; Proposal IMA 68-3 is nullified. The name “wrightite” is discredited and the original name β-domeykite is revalidated. IMA-WEB-Seite Sept. 2009

American Mineralogist Volume 56, pages 1319-1331, 1971

Frédéric Hatert; Stuart J. Mills; Marco Pasero; Ritsuro Miyawaki; Ferdinando Bosi: CNMNC guidelines for the nomenclature of polymorphs and polysomes. Mineralogical Magazine Vol. 87, Nr. 2 (2023) S. 225-232. Umbenennung in Trigodomeykit

Other languages

German

Trigodomeykit

CNMNC Newsletter 69; Mineralogical Magazine, 86, https://doi.org/10.1180/mgm.2022.115.

English

Trigodomeykite

old name

German

Domeykit-β

umbenannt; CNMNC Newsletter 69; Mineralogical Magazine, 86, https://doi.org/10.1180/mgm.2022.115.

English

Domeykite-β

renamed; CNMNC Newsletter 69; Mineralogical Magazine, 86, https://doi.org/10.1180/mgm.2022.115.

English

Wrightite (Domeykite-β)

Name diskreditiert, IMA-WEB-Seite Sept. 2009

Alternative Name

German

Beta-Domeykit

English

Beta-domeykite

German

Domeykit-Beta

English

Domeykite-beta

German

Metadomeykit

Lapis-Mineralienverzeichnis März 2018

German

ß-Domeykit

(scharfes S anstelle von Beta für die Suche)

English

ß-domeykite

(german ss anstelle von Beta for the search)

German

β-Domeykit

English

β-domeykite

CNMNC symbol

Symbol

Do-β

IDs

GUSID (Global unique identifier short form) SRbVDiCfn0K0x25fFYcJRg
GUID (Global unique identifier) 0ED51649-9F20-429F-B4C7-6E5F15870946
Database ID 5277