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Empressite

Pictures (2 Images total)

Empressit, Altait
Views (Image: 1296327513): 1484
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 (Image: 1296327586): 1085
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

Preface

Author (Name, Year)

Bradley, 1914

References

American Mineralogist 89 (2004), 1043

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Empressite

AgTe

orthorhombisch : mmm : Pmnb

2.CB.80

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

Acanthite

Ag2S

monoklin : 2/m : P21/n

II/B.05-010

Naumannite

Ag2Se

orthorhombisch : 222 : P212121

II/B.05-030

Hessite

Ag2Te

monoklin : 2/m : P21/c

II/B.05-040

Aguilarite

Ag4SeS

II/B.05-050

Cervelleite

Ag4TeS

monoklin : 2/m : P21/n

II/B.05-060

Tsnigriite

Ag9SbTe3S3

monoklin : m, 2/m : Pm, P2/m

II/B.05-075

Stützite

Ag5-xTe3 {x = 0.24-0.36}

hexagonal : 6m2 : P62m

II/B.05-080

Chenguodaite

Ag9FeTe2S4

II/B.05-085

Empressite

AgTe

orthorhombisch : mmm : Pmnb

II/B.05-090

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

Vulcanite

CuTe

orthorhombisch : mmm : Pmnm

2.CB.900

Empressite

AgTe

orthorhombisch : mmm : Pmnb

2.CB.920

Muthmannite

AuAgTe2

monoklin : 2/m : P2/m

2.CB.940

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Tsumoite

BiTe

trigonal : 3m : P3m1

02.08.20.01

Sulphotsumoite

Bi3Te2S

trigonal : 3m : P3m1

02.08.20.02

Nevskite

Bi(Se,S)

trigonal : 3m : P3m1

02.08.20.03

Ingodite

Bi2TeS

02.08.20.04

Telluronevskite

Bi3TeSe2

trigonal : 3m : P3m1

02.08.20.05

Realgar

AsS

monoklin : 2/m : P21/n

02.08.22.01

Pararealgar

AsS

monoklin : 2/m : P21/c

02.08.22.02

Uzonite

As4S5

monoklin : 2/m : P21/m

02.08.22.03

Alacránite

As8S9

monoklin : 2/m : P2/c

02.08.22.04

Herzenbergite

SnS

orthorhombisch : mmm : Pbnm

02.08.23.01

Empressite

AgTe

orthorhombisch : mmm : Pmnb

02.08.24.01

Muthmannite

AuAgTe2

monoklin : 2/m : P2/m

02.08.25.01

Alternative Name

Simplified Chinese

粒碲银矿

CNMNC symbol

Symbol

Eps

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Эмпрессит

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Empressit
Crystal-Treasure.com - search for: Empressit
Bosse - search for: Empressit

Locations with GPS information