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Empressite (Empressit)

Pictures (2 Images total)

Empressit, Altait
Views (File:
1296327513
): 1646
Empressit, Altait
Empressit mit Altait (Metallglanz), Größe: 4,8 x 3 x 2,5 cm, Fundort: Klondike Mine, Bonanza District, Saguache Co., Colorado, USA
Copyright: Dan Weinrich; Contribution: thdun5
Location: USA/Colorado/Saguache Co./Bonanza District/Klondike Mine
Mineral: Altaite, Empressite
Image: 1296327513
License: Usage for Mineralienatlas project only
Empressit, Altait

Empressit mit Altait (Metallglanz), Größe: 4,8 x 3 x 2,5 cm, Fundort: Klondike Mine, Bonanza District, Saguache Co., Colorado, USA
Copyright: Dan Weinrich
Contribution: thdun5 2011-01-29
Locality: Klondike Mine / Bonanza District / Saguache Co. / Colorado / USA
Empressit, Altait
Views (File:
1296327586
): 1186
Empressit, Altait
Empressit mit Altait (Metallglanz), Bildbreite: ca. 1,5 cm, Fundort: Klondike Mine, Bonanza District, Saguache Co., Colorado, USA
Copyright: Dan Weinrich; Contribution: thdun5
Location: USA/Colorado/Saguache Co./Bonanza District/Klondike Mine
Mineral: Altaite, Empressite
Image: 1296327586
License: Usage for Mineralienatlas project only
Empressit, Altait

Empressit mit Altait (Metallglanz), Bildbreite: ca. 1,5 cm, Fundort: Klondike Mine, Bonanza District, Saguache Co., Colorado, USA
Copyright: Dan Weinrich
Contribution: thdun5 2011-01-29
Locality: Klondike Mine / Bonanza District / Saguache Co. / Colorado / USA

Collectors Summary

Color bronzefarben, hellbronze
Streak color graulich schwarz
Hardness (Mohs) 3.5
Solubility +++ HNO3
Crystal System orthorhombisch, Pmnb

Chemism

Chemical formula

AgTe

Chemical composition

Silber, Tellur

Unit weight: 235.47122 u; Number of atoms in the formula: 2

Info

Empirical formula:

AgTe

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Silver

Ag

45.81

1

50.00

107.8682200

107.8682200
Tellurium

Te

54.19

1

50.00

127.6030000

127.6030000

Analysis wt%

Ag : 44.90, Te : 53.60 (Ref: American Mineralogist 64)

Strunz 9th edition incl. updates

2.CB.80

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
B: mit Zink (Zn), Eisen (Fe), Kupfer (Cu), Silber (Ag), usw.
80:Empressit-Gruppe

Lapis Classification

II/B.05-090

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

Classification by Hölzel

2.CB.920

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
B: With Zn,Cu (etc), Coordination Number ~[4] Framework of Cornersharing Tetrahedra: Sphalerite-Germanite-Family
9: Unclassified (with Te)

Dana 8th edition

02.08.24.01

02: Sulfide Minerals
08: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1

IMA status

Neudefinition von der CNMNC anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

bronzefarben, hellbronze

Streak color

graulich schwarz

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

orthorhombisch

Class (H-M)

mmm

Space Group number

62

Space Group

Pmnb

Cell parameters a (Å)

8.90

Cell parameters b (Å)

20.07

Cell parameters c (Å)

4.62

Cell parameters a/b or c/a

0.443

Cell parameters c/b

0.230

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

90°

Z

16

Volumne (ų)

825.238

X-Ray Powder Diffraction

10.04(40),
4.02(40),
3.81(60),
3.33(60),
3.18(50),
2.70(100),
2.23(80),
2.14(50)
XRD chart Empressite

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

Crystals 3D

Open larger view

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

3.5

VHN (Hardness Vickers)

139 (25g)

Density (g/cm³)

7.5 - 7.6 / Durchschnittlich = 7.55

7.581 ( ρ calc. Mineralienatlas )

Instability

+++ HNO3

(Co-)Type locality

(Co-)Type locality

USA/Colorado/Saguache Co./Bonanza District/Bonanza/Empress Josephine Mine

Preface

Author (Name, Year)

Bradley, 1914

References

American Mineralogist 89 (2004), 1043

Other languages

German

Empressit

Spanish

Empressita

English

Empressite

French

Empressite

Russian

Эмпрессит

Alternative Name

Simplified Chinese

粒碲银矿

CNMNC symbol

Symbol

Eps

Locations with GPS information