Warikahnite Mineral Data

Warikahnite Mineral Data +

General Warikahnite Information

Chemical Formula:

Zn3(AsO4)2·2(H2O)

Composition:

Molecular Weight = 510.04 gm

Zinc 38.46 % Zn 47.87 % ZnO

Arsenic 29.38 % As 45.06 % As₂O₅

Hydrogen 0.79 % H 7.06 % H₂O

Oxygen 31.37 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Zn₃(AsO₄)₂·2(H₂O)

IMA Status:

Approved IMA 1979

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 100347

PDF 33-1468

Warikahnite Image

Images:

Warikahnite

Comments: Divergent, acicular aggregate of yellowish, brownish orange warikahnite crystals on a white quartz matrix. William Pinch collection. Featured on the cover of the Mineralogical Record, 36:4..
Location: O stope, 31st level, Tsumeb mine, Namibia.. Scale: 3 x 4.9 cm.
© Jeff Scovil

Warikahnite Crystallography

Axial Ratios:

a:b:c =0.7464:1:1.6189

Cell Dimensions:

a = 6.71, b = 8.989, c = 14.553, Z = 4; alpha = 105.59°, beta = 93.44°, gamma = 108.68° V = 799.51 Den(Calc)= 4.24

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 2.82(1), 2.87(0.8), 6.21(0.8),

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

Riffel H , Keller P , Hess H , Tschermaks Mineralogische und Petrographische Mitteilungen , 27 (1980) p.187-199, Die kristallstruktur von warikahnit, Zn3[(H2O)2|(AsO4)2], Locality: Tsumeb mine, Namibia

Physical Properties of Warikahnite

Cleavage:

[001] Perfect, [010] Good, [100] Good

Color:

Colorless, Honey yellow, Light yellow.

Density:

4.24

Streak:

white

Optical Properties of Warikahnite

Gladstone-Dale:

CI meas= -0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.033 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1783,KPDmeas= 0.1783,KC= 0.1727

Optical Data:

Biaxial (+), a=1.747, b=1.753, g=1.768, bire=0.0210, 2V(Calc)=66, 2V(Meas)=75.

Calculated Properties of Warikahnite

Electron Density:

r_electron=3.99 gm/cc
note: r_Warikahnite=4.24 gm/cc.

Fermion Index

Fermion Index = 0.01592
Boson Index = 0.98408

Photoelectric:

PE_Warikahnite= 39.76 barns/electron
U=PE_Warikahnite x r_electron= 158.67 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Warikahnite is Not Radioactive

Warikahnite Classification

Dana Class:

40.3.1.1 (40)Hydrated Phosphates, etc

(40.3)where (A++)3 (XO4)2 · x(H2O)

(40.3.1)Dana Group

40.3.1.1 Warikahnite Zn3(AsO4)2·2(H2O) P1 1

Strunz Class:

VII/C.07-40 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg

VII/C.07 - Schubnelite - Warikahnite series

VII/C.07-05 Serrabrancaite! MnPO4·(H2O) C 2/c 2/m

VII/C.07-10 Schubnelite Fe(VO4)(H2O) P1 1

VII/C.07-20 Fervanite Fe4(VO4)4·5(H2O) Unk. Mono

VII/C.07-30 Kolovratite HydrousvanadateofNiandZn ? Mono

VII/C.07-40 Warikahnite Zn3(AsO4)2·2(H2O) P1 1

Other Warikahnite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Warikahnite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

Search for Warikahnite using:

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

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

Translate Warikahnite Mineral Data :

Ask about Warikahnite 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 Warikahnite Specimen Label here :

Warikahnite

Zn3(AsO4)2·2(H2O)
Dana No: 40.3.1.1 Strunz No: VII/C.07-40
Locality:

Notes: