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Gallobeudantite

Collectors Summary

Color blass gelb, grünlichgelb, cremfarben
Streak color blass gelblich weiß
Lustre Glasglanz
Hardness (Mohs) 4
Cleavages {001} möglicherweise
Fracture eben bis muschelig
Crystal System trigonal, R3m

Chemism

Chem­ical formula

PbGa3(AsO4)(SO4)(OH)6

Chem­ical com­po­si­tion

Arsen, Blei, Gallium, Sauerstoff, Schwefel, Wasserstoff

Unit weight: 753.406104 u; Number of atoms in the formula: 26

Info

Empirical formula:

PbGa3(AsO4)(SO4)(OH)6

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Hydrogen

H

0.80

6

23.08

1.0079470

6.0476820

Oxygen

O

29.73

14

53.85

15.9994300

223.9920200

Sulfur

S

4.26

1

3.85

32.0655000

32.0655000

Gallium

Ga

27.76

3

11.54

69.7231000

209.1693000

Arsenic

As

9.94

1

3.85

74.9216020

74.9216020

Lead

Pb

27.50

1

3.85

207.2100000

207.2100000

Anal­y­sis wt%

PbO : 30.40, ZnO : 0.50, Ga2O3 : 19.80, Fe2O3 : 10.70, Al2O3 : 3.00, As2O5 : 20.20, SO3 : 8.20, H2O : 6.90 (Ref: Canadian Mineralogist 96)

Strunz 9th edi­tion incl. updates

8.BL.05

8: Phosphate, Arsenate, Vanadate
B: Phosphate, etc., mit weitere Anionen, ohne H2O
L: Mit mittelgroßen und großen [Kationen] (OH, etc.):RO4 = 3:1
05:Beudantit-Gruppe

Lapis Clas­sifica­tion

VII/B.35-075

VII: PHOSPHATE, ARSENATE UND VANADATE ("Phosphate" des Registers immer einschließlich isotyper Arsenate und Vanadate!)
B: Wasserfreie Phosphate, mit fremden Anionen F,Cl,O,OH
35: Mittelgroße und große Kationen: Mg-Cu-Zn und Ca-Na-K-Ba-Pb; Beudantit-Gruppe

Clas­sifica­tion by Hölzel

7.BC.300

7: SULFATES CHROMATES MOLYBDATES WOLFRAMATES
B: Sulfates (+Anions -Water)
C: Beudantite-Group
3: Beudantites with other elements than Al, Fe(3+)

Dana 8th edi­tion

43.04.01.10

43: Compound Phosphates, etc.
04: Compound Phosphates, etc. (Anhydrous Compound Anions With Hydroxyl or Halogen)
01: Beudantite Group

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

IMA Classification

IMA Clas­sifica­tion

Alunite supergroup  ⇒ Beudantite group with 1c

Optical Properties

Color

blass gelb, grünlichgelb, cremfarben

Streak color

blass gelblich weiß

Diaphane­ity (Trans­parency)

transparent

Lus­tre

Glasglanz

max. Birefrin­gence

0.013

Birefringence chart\! Gallobeudantite title=Birefringence chart Gallobeudantite

Michel-Levy Color Chart viewed according to the maximum birefringence (at 30μm). Mineral color is not taken into account. Click on the image to enlarge or change thickness.

RI value α / ω / n

1.763

RI value γ / ε

1.750

Ri mean

1.759

2V angle

Uniaxial (-)

Crystallography

Crystal Sys­tem

trigonal

Class (H-M)

3m

Space Group number

160

Space Group

R3m

Cell param­e­ters a (Å)

7.225

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

17.03

Cell param­e­ters a/b or c/a

2.357

Cell param­e­ters c/b

-

Z

3

Volumne (ų)

769.876

X-Ray Pow­der Diffrac­tion

5.85(90),
3.59(40),
3.038(100),
2.851(30),
2.513(30),
2.271(40),
1.948(30),
1.797(30)

XRD chart Gallobeudantite

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)

4

VHN (Hard­ness Vick­ers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

4.87 (berechnet)

4.875 ( ρ calc. Mineralienatlas )

Cleav­ages

{001} möglicherweise

Frac­ture

eben bis muschelig

Tenac­ity

spröde

(Co-)Type locality

(Co-)Type locality

Namibia/Oshikoto (Otjikoto), Region/Tsumeb/Tsumeb Mine

Type mate­r­ial

Canadian Museum of Nature, Ottawa, Kanada

Canadian Geological Survey, Ottawa, Kanada

Col­lec­tion number of type mate­r­ial

81518 (Canadian Museum of Nature)

Preface

Name from

Für sein vorherrschendes Galliumgehalt als Mitglied der Gruppe Beudantit.

Author (Name, Year)

Jambor & Owens & Grice & Feinglos, 1996

References

Canadian Mineralogist 34 (1996), 1305

IMA group assignments

Other languages

German

Gallobeudantit

English

Gallobeudantite

French

Gallobeudantite

Spanish

Galobeudantita

Russian

Галлобёдантит

Alternative Name

Gallobeudantita

CNMNC (IMA)-Number

IMA 1994-021

CNMNC symbol

Symbol

Gbdn

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

German pages

DeWikiPedia - search for: Gallobeudantit
Google-Bilder-Suche - search for: Gallobeudantit
Mineralienatlas.de (Forum) - search for: Gallobeudantit

English pages

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

Russian pages

Webmineral.ru - search for: Галлобёдантит

Mineral Dealer

German pages

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Crystal-Treasure.com - search for: Gallobeudantit
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Edelsteine Neuburg - Gundolf Fischer - search for: Gallobeudantit

Locations with GPS information