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Alburnite (IMA 2012-073)

Collectors Summary

Color graublau mit Blauton
Lustre Metallglanz
Hardness (Mohs) 4
Cleavages keine
Crystal System kubisch, F43m
Morphology rundliche Aggregate, Gängchen, unregelmäßige Einschlüsse; bis 50 µm

Chemism

Chemical formula

Ag8GeTe2S4

Empirical formula (analysis)

Ag8.04Ge0.88Te2.09S3.99

Additional chem. information

Argyrodit-Canfieldit-Serie

Chemical composition

Germanium, Silber, Tellur, Schwefel

Unit weight: 1325.8161838 u; Number of atoms in the formula: 15

Info

Empirical formula:

Ag8.04Ge0.88Te2.09S3.99

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

9.65

3.99

26.60

32.0655000

127.9413450

Germanium

Ge

4.82

0.88

5.87

72.6410000

63.9240800

Silver

Ag

65.41

8.04

53.60

107.8682200

867.2604888

Tellurium

Te

20.12

2.09

13.93

127.6030000

266.6902700

Analysis wt%

Ag : 65.49, Ge : 4.82, Te : 20.16, S : 9.66; WDX (Tamas et al. 2014)

Lapis Classification

II/B.08-030

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
B: Sulfide, Selenide und Telluride mit Verhältnis Metall : S,Se,Te > 1:1
8: Sulfide, Selenide und Telluride mit vorwiegend Kupfer und Silber/Gold

IMA status

anerkannt - Neue Mineralien Feb. 2013; CNMNC Newsletter No. 15

Mineral status

anerkanntes Mineral

Optical Properties

Color

graublau mit Blauton

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Pleochroism

keiner an Luft

Bireflectance

keine

Anisotropism

isotrop

Reflectivity: (Lambda nm) ↓, ↑, Ø

(470) 29.70, , 29.70
(546) 28.00, , 28.00
(589) 27.35, , 27.35
(650) 26.95, , 26.95

Reflection chart Alburnite

Reflectivity Ø

28.00

Optical Data Luminescence

Luminescence

keine Fluoreszenz bekannt

Crystallography

Crystal System

kubisch

Class (H-M)

43m

Space Group number

216

Space Group

F43m

Cell parameters a (Å)

10.40

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

4

Volumne (ų)

1124.864

X-Ray Powder Diffraction

6.004(67), 3.136(48), 3.002(100), 2.600(26), 2.123(33), 2.002(61), 1.838(76), 1.644(12)

XRD chart Alburnite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Morphology

rundliche Aggregate, Gängchen, unregelmäßige Einschlüsse; bis 50 µm

Physical Properties

Hardness (Mohs)

4

Density (g/cm³)

7.828 (berechnet)

7.828 ( ρ calc. Mineralienatlas )

Cleavages

keine

(Co-)Type locality

(Co-)Type locality

Rumänien/Alba, Kreis/Rosia Montana (Verespatak)/Cârnicel Gang

Type material

Mineralogical Museum, Department of Geology, Faculty of Biology and Geology, Babes-Bolyai University, Cluj-Napoca, Romania;
Zentrale Elektronen-Mikrosonde, Institut der Geologie, Mineralogie and Geophysik, Ruhr University, Bochum, Deutschland

Collection number of type material

71a/1 und 71a/2 (Rumänien), 1064b (Deutschland)

Preface

Associations

Tetraedrit, Hessit, Galenit

Name from

Der Name Alburnit ist von Lateinischen Namen der Fundstelle abgeleitet. Die Roşia Montană AU-Ag Lagerstätte war während der römischen Periode als Alburnus Maior bekannt.

Author (Name, Year)

Călin G. Tamaş, Bernard Grobety, Laurent Bailly, Heinz-Juergen Bernhardt und Adrian Minut (2013)

References

Tamaş, C.G., Grobety, B., Bailly, L., Bernhardt, H.-J. and Minut. A. (2013) Alburnite, IMA 2012-073. CNMNC Newsletter No. 15, February 2013, page 10; Mineralogical Magazine, 77, 112.

Tamaş, C.G., Grobety, B., Bailly, L., Bernhardt, H.-J., Minut, A. (2014) Alburnite, Ag8GeTe2S4, a new mineral species from the Rosia Montana Au-Ag epithermal deposit, Apuseni Mountains, Romania. American Mineralogist, 99, 57-64

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Putzite

(Cu,Ag)8GeS6

kubisch : 43m : P43m

II/B.08-005

Argyrodite

Ag8GeS6

orthorhombisch : mm2 : Pna21

II/B.08-010

Canfieldite

Ag8SnS6

orthorhombisch : mm2 : Pna21

II/B.08-020

Alburnite

Ag8GeTe2S4

kubisch : 43m : F43m

II/B.08-030

Other languages

German

Alburnit

English

Alburnite

Russian

Албурнит

IMA Number

IMA 2012-073

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Alburnit
Google-Bilder-Suche - search for: Alburnit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Alburnit

English pages

Mindat - search for: Alburnite
Webmineral - search for:Alburnite
Handbook-of-Mineralogy - search for: Alburnite
RRUFF - Raman, XRD and other mineral data - search for: Alburnite
RRUFF - References and PDF downloads - search for: Alburnite
American-Mineralogist-Crystal-Structure-Database - search for: Alburnite
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Russian pages

Webmineral.ru - search for: Албурнит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Alburnit
Bosse - search for: Alburnit

Locations with GPS information




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