Gallobeudantite Mineral Data

Gallobeudantite Mineral Data +

[Register] [Auction Rules] [Current Listing] [About Us] [Site Map]
e-Rocks.com, auction and sales venue for all rock and mineral enthusiasts
Our mission is to provide an online centre for Buyers and Sellers with reliable service and support
Brought to you by Thames Valley Minerals

General Gallobeudantite Information

Chemical Formula:

PbGa3[(AsO4),(SO4)]2(OH)6

Composition:

Molecular Weight = 718.80 gm

Aluminum 2.25 % Al 4.26 % Al₂O₃

Zinc 0.91 % Zn 1.13 % ZnO

Gallium 14.55 % Ga 19.56 % Ga₂O₃

Iron 6.22 % Fe 8.89 % Fe₂O₃

Arsenic 11.47 % As 17.59 % As₂O₅

Hydrogen 0.83 % H 7.39 % H₂O

Lead 28.83 % Pb 31.05 % PbO

Sulfur 4.01 % S 10.02 % SO₃

Oxygen 30.94 % O

______ ______

100.00 % 99.89 % = TOTAL OXIDE

Empirical Formula:

PbGa_1.5Fe³⁺_0.8Al_0.6Zn_0.1(AsO₄)_1.1(SO₄)_0.9(OH)_5.9

Environment:

A secondary mineral in vugs of oxidized ore.

IMA Status:

Approved IMA 1996 (Dana # Added)

Locality:

Tsumeb, Namibia. Link to MinDat.org Location Data.

Name Origin:

For the relationship to beudantite and the gallium content.

Synonym:

IMA1994-021

Search for Gallobeudantite Images

Images:

Image not yet available on Webmineral.com

Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Gallobeudantite Crystallography

Axial Ratios:

a:c = 1:2.35709

Cell Dimensions:

a = 7.225, c = 17.03, Z = 3; V = 769.88 Den(Calc)= 4.65

Crystal System:

Trigonal - Ditrigonal PyramidalH-M Symbol (3m) Space Group: R 3m

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.038(1), 5.85(0.9), 3.59(0.4),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Jambor J L , Owens D R , Grice J D , Feinglos M N , The Canadian Mineralogist , 34 (1996) p.1305-1315, Gallobeudantite, PbGa3[(AsO4),(SO4)]2(OH)6, a new mineral species from Tsumeb,, Namibia, and associated new gallium analogues of the alunite - jarosite family, Locality: Tsumeb, Namibia

Physical Properties of Gallobeudantite

Cleavage:

[001] Indistinct

Color:

Pale yellow, Slightly greenish yellow, Cream.

Density:

4.58

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Disseminated - Occurs in small, distinct particles dispersed in matrix.

Habit:

Rhombohedral Crystals - Occurs as well-formed crystals showing rhobohedral crystals.

Hardness:

4 - Fluorite

Luster:

Vitreous - Adamantine

Streak:

pale yellowish white

Optical Properties of Gallobeudantite

Gladstone-Dale:

CI meas= 0.105 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.118 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1627,KPDmeas= 0.1652,KC= 0.1845

Optical Data:

Uniaxial (-), e=1.75, w=1.763, bire=0.0130.

Calculated Properties of Gallobeudantite

Electron Density:

r_electron=4.18 gm/cc
note: r_{Gallobeudantite}=4.58 gm/cc.

Fermion Index

Fermion Index = 0.06584
Boson Index = 0.93416

Photoelectric:

PE_{Gallobeudantite}= 504.29 barns/electron
U=PE_{Gallobeudantite} x r_electron=2,107.21 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Gallobeudantite is Not Radioactive

Gallobeudantite Classification

Dana Class:

43.4.1.10 (43)Compound Phosphates, etc.

(43.4)(Anhydrous Compound Anions With Hydroxyl or Halogen)

(43.4.1)Dana Group

43.4.1.1 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.4.1.2 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m

43.4.1.3 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.4.1.4 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m

43.4.1.5 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.4.1.6 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.4.1.7 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m

43.4.1.8 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

43.4.1.9 Weilerite BaAl3H[(As,P)O4]2(OH)6 R 3m 3 2/m

43.4.1.10 Gallobeudantite ! PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m

Strunz Class:

VII/B.35-75 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.35 - Beudantite group

VII/B.35-10 Schlossmacherite (H3O,Ca)Al3(AsO4,SO4)2(OH)6 R 3m 3 2/m

VII/B.35-20 Woodhouseite CaAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-30 Svanbergite SrAl3(PO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-40 Kemmlitzite (Sr,Ce)Al3(AsO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-60 Hinsdalite (Pb,Sr)Al3(PO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-65 Orpheite PbAl3(PO4,SO4)2(OH)6(?) R 3m 3 2/m

VII/B.35-70 Hidalgoite PbAl3(AsO4)(SO4)(OH)6 R 3m 3 2/m

VII/B.35-75 Gallobeudantite PbGa3[(AsO4),(SO4)]2(OH)6 R 3m 3m

VII/B.35-80 Corkite PbFe3(PO4)(SO4)(OH)6 R 3m 3m

VII/B.35-90 Beudantite PbFe3(AsO4)(SO4)(OH)6 R 3m 3 2/m

Other Gallobeudantite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.82,p1039,1997) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Gallobeudantite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -Handbook of Mineralogy (UofA) 6 -MinDAT 7 -MinMax(Deutsch) 8 -MinMax(English) 9 -Mineralienatlas (Deutsch) 10 -QUT Mineral Atlas 11 - WWW-MINCRYST

Search for Gallobeudantite using:

[ALTAVISTA] [AOL] [About.com] [All-The-Web] [HotBot] [Ixquick] [LookSmart] [MAMMA] [MSN.COM] [Netscape] [Teoma] [Wikipedia] [YAHOO]

Visit our Advertisers for Gallobeudantite :
AA Mineral Specimens
B and L Minerals
Dan Weinrich Fine Minerals
Dan Weinrich Auctions
e-Rocks Auctions
Excalibur Minerals
Exceptional Minerals
Fabre Minerals
Greenside Minerals
John Betts Fine Minerals
Masons Minerals
Minernet.it
Mineral News
Mineral of the Month Club
MineralsWeb Fine Minerals
Rockshop.cz Kalat Fine Minerals
T G Fine Minerals
Wrights Rock Shop

Translate Gallobeudantite Mineral Data :

Ask about Gallobeudantite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Gallobeudantite Specimen Label here :

Gallobeudantite

PbGa3[(AsO4),(SO4)]2(OH)6
Dana No: 43.4.1.10 Strunz No: VII/B.35-75
Locality:

Notes: