Warikahnite Mineral Data

Advertisment

Our Mission is Simple: RMS will be the go-to portal for all Mineral, Gem and Rock shows in the USA

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)

Environment:

Secondary arsenate mineral in zinc-bearing ore deposit.

IMA Status:

Approved IMA 1979

Locality:

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

Name Origin:

Named for Walter Richard Kahn, collector of Tsumeb minerals, Bayersoien, Germany.

Name Pronunciation:

Warikahnite + Pronunciation

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, Orange.

Density:

4.24

Diaphaneity:

Transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Warikahnite

Gladstone-Dale:

CI meas= -0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1766,KPDmeas= 0.1783,KC= 0.1727
Ncalc = 1.73 - 1.74

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:

Bulk Density (Electron Density)=4.03 gm/cc
note: Specific Gravity of Warikahnite =4.28 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Warikahnite= 39.76 barns/electron
U=PE_Warikahnite x rElectron Density= 160.16 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Warikahnite is Not Radioactive

Warikahnite Classification

Dana Class:

40.03.01.01 (40)Hydrated Phosphates, etc

(40.03)where (A++)3 (XO4)2 · x(H2O)

(40.03.01)Dana Group

40.03.01.01 Warikahnite Zn3(AsO4)2•2(H2O) P1 1

Strunz Class:

08.CA.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CA -With small and large/medium cations

08.CA.35 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 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

Search for Warikahnite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Warikahnite :

A Bijoux Google Search for Warikahnite
Adam's Minerals Google Search for Warikahnite
Cape Minerals Google Search for Warikahnite
Dakota Matrix Minerals Google Search for Warikahnite
Excalibur Mineral Corp. Google Search for Warikahnite
Exceptional Minerals Google Search for Warikahnite
John Betts Fine Minerals Search for Warikahnite
McDougall Minerals Google Search for Warikahnite
Mineral News Website Link
Rock and Mineral Shows Google Search for Warikahnite
Weinrich Minerals, Inc. Google Search for Warikahnite

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: 40.03.01.01 Strunz No: 08.CA.35
Locality:

Notes: