Koritnigite Mineral Data

General Koritnigite Information

Chemical Formula:

ZnHAsO4•(H2O)

Composition:

Molecular Weight = 223.33 gm

Zinc 29.28 % Zn 36.44 % ZnO

Arsenic 33.55 % As 51.46 % As₂O₅

Hydrogen 1.35 % H 12.10 % H₂O

Oxygen 35.82 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

ZnH(AsO₄)•(H₂O)

Environment:

Secondary mineral of the lower oxidation zone in a dolostone-hosted polymetallic hydrothermal ore deposit

IMA Status:

Approved IMA 1979

Locality:

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

Name Origin:

Named for Sigmund Koritnig (1912-1984), petrologist, University of Gottingen, Gottingen, Germany.

Name Pronunciation:

Koritnigite + Pronunciation

Synonym:

ICSD 100581

PDF 34-1396

Koritnigite Image

Images:

Koritnigite

Comments: Translucent nearly colorless fragment of koritnigite.
Location: Tsumeb, Oshikoto, Namibia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Koritnigite Crystallography

Axial Ratios:

a:b:c =0.5021:1:0.4212

Cell Dimensions:

a = 7.948, b = 15.829, c = 6.668, Z = 8; alpha = 90.86°, beta = 96.56°, gamma = 90.05° V = 833.31 Den(Calc)= 3.56

Crystal System:

Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 7.9(1), 3.16(0.9), 3.83(0.7),

Physical Properties of Koritnigite

Cleavage:

{010} Perfect

Color:

Colorless.

Density:

3.54

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Koritnigite

Gladstone-Dale:

CI meas= -0.022 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1851,KPDmeas= 0.1862,KC= 0.1821
Ncalc = 1.64 - 1.65

Optical Data:

Biaxial (+), a=1.632, b=1.652, g=1.693, bire=0.0610, 2V(Calc)=72, 2V(Meas)=70.

Calculated Properties of Koritnigite

Electron Density:

Bulk Density (Electron Density)=3.38 gm/cc
note: Specific Gravity of Koritnigite =3.56 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Koritnigite= 37.66 barns/electron
U=PE_Koritnigite x rElectron Density= 127.28 barns/cc.

Radioactivity:

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

Koritnigite Classification

Dana Class:

39.01.04.01 (39)Hydrated Acid Phosphates, etc

(39.01)A+ [HXO4] ï¿½ x(H2O)

(39.01.04)Dana Group

39.01.04.01 Koritnigite ZnHAsO4•(H2O) P1 1

39.01.04.02 Cobaltkoritnigite (Co,Zn)(AsO3OH)•(H2O) P1 1

Strunz Class:

08.CB.20 08 - PHOSPHATES, ARSENATES, VANADATES

08.C - Phosphates without Additional Anions, with H2O

08.CB -With only medium-sized cations, RO4:H2O = 1:1

08.CB.20 Cobaltkoritnigite (Co,Zn)(AsO3OH)•(H2O) P1 1

08.CB.20 Koritnigite ZnHAsO4•(H2O) P1 1

Other Koritnigite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Koritnigite :
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
15 - WWW-MINCRYST

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Koritnigite

ZnHAsO4•(H2O)
Dana No: 39.01.04.01 Strunz No: 08.CB.20
Locality:

Notes:

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