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Barquillite

Additional Functions

Collectors Summary

Color grau mit einem blass violetten Farbton
Lustre Metallglanz
Hardness (Mohs) 4 - 4.5
Crystal System tetragonal, I42m

Chemism

Chem­ical formula

Cu2(Cd,Fe)GeS4

Chem­ical com­po­si­tion

Cadmium, Eisen, Germanium, Kupfer, Schwefel

Unit weight: 426.26575 u; Number of atoms in the formula: 8

Info

Empirical formula:

Cu2(Cd0.75Fe0.25)GeS4

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

30.09

4

50.00

32.0655000

128.2620000

Iron

Fe

3.28

0.25

3.13

55.8452000

13.9613000

Copper

Cu

29.82

2

25.00

63.5463000

127.0926000

Germanium

Ge

17.04

1

12.50

72.6410000

72.6410000

Cadmium

Cd

19.78

0.75

9.38

112.4118000

84.3088500

Anal­y­sis wt%

Cu : 30.67, Fe : 2.20, Mn : 0.43, Cd : 20.38, Ge : 14.99, S : 29.42 (Ref: European Journal of Mineralogy 99)

Strunz 9th edi­tion incl. updates

2.CB.20

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.
20:Mawsonit-Gruppe

Lapis Clas­sifica­tion

II/C.06-045

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1
6: Stannit-Gruppe

Clas­sifica­tion by Hölzel

2.CB.430

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
4: Luzonite-Hemusite-Group

Dana 8th edi­tion

02.09.02.11

02: Sulfide Minerals
09: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1
02: Stannite Group (Tetragonal: I-42m) A2BCS type

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

grau mit einem blass violetten Farbton

Diaphane­ity (Trans­parency)

opak

Lus­tre

Metallglanz

2V angle

Uniaxial

Pleochro­ism

sehr schwach

Reflec­tiv­ity: (Lambda nm) ↓, ↑, Ø

(400) 24.80, , 24.80
(420) 24.80, , 24.80
(440) 24.70, , 24.70
(460) 24.40, , 24.40
(480) 24.20, , 24.20
(500) 23.80, , 23.80
(520) 23.50, , 23.50
(540) 23.30, , 23.30
(560) 23.20, , 23.20
(580) 23.00, , 23.00
(600) 23.10, , 23.10
(620) 23.10, , 23.10
(640) 23.30, , 23.30
(660) 23.50, , 23.50
(680) 23.30, , 23.30
(700) 22.90, , 22.90

Reflection chart Barquillite

Reflec­tiv­ity Ø

23.68

Crystallography

Crystal Sys­tem

tetragonal

Class (H-M)

42m

Space Group number

121

Space Group

I42m

Cell param­e­ters a (Å)

5.45

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

10.6

Cell param­e­ters a/b or c/a

1.945

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

314.846

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4 - 4.5

VHN (Hard­ness Vick­ers)

240 (?g)

Density (g/cm³)

4.53 (berechnet)

4.496 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Spanien/Kastilien und León (Castilla y León)/Salamanca, Provinz/Barquilla Lagerstätte/Fuentes Villanas Mine

Type material

Museo Geominero, Madrid, MGM-3000; Department of Geology, Salamanca, Spanien

Area of Crystallography and Mineralogy, Badajoz, Spanien

Institute for Mineralogy, Ruhr University, Bochum, Deutschland

Laboratory of Crystallography, Nancy, Frankreich

Preface

Name from

Für die Stadt Barquilla in Spanien, in der Nähe der Typlokalität

Author (Name, Year)

Murciego & Pascua & Babkine & Dusausoy & Medenbach & Bernhardt, 1999

References

European Journal of Mineralogy: 11: 111-117.

American Mineralogist 84 (1999), 1464.

Strunz Mineralogical Tables 9. Edition.

Other languages

German

Barquillit

Spanish

Barquillita

English

Barquillite

French

Barquillite

Russian

Баркиллит

Alternative Name

English

Barquilite

CNMNC (IMA)-Number

IMA 1996-050

CNMNC symbol

Symbol

Bql

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

German pages

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Mineralienatlas.de (Forum) - search for: Barquillit

English pages

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RRUFF - Raman, XRD and other mineral data - search for: Barquillite
RRUFF - References and PDF downloads - search for: Barquillite
American-Mineralogist-Crystal-Structure-Database - search for: Barquillite
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Russian pages

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