Krautite Mineral Data

General Krautite Information

Chemical Formula:

MnAs+++++O3(OH)2•(H2O)

Composition:

Molecular Weight = 229.89 gm

Manganese 23.90 % Mn 30.86 % MnO

Arsenic 32.59 % As 49.99 % As₂O₅

Hydrogen 1.75 % H 15.67 % H₂O

Oxygen 41.76 % O

______ ______

100.00 % 96.52 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺AsO₃(OH)₂•(H₂O)

Environment:

Found on museum mineral specimens.

IMA Status:

Approved IMA 1975

Locality:

Sacarimb (Nagyag) and Cavnic (Kapnikbanya), Romania. Link to MinDat.org Location Data.

Name Origin:

Named for Francois Kraut, mineralogist, Natural History Museum, Paris, France.

Name Pronunciation:

Krautite

Synonym:

ICSD 79619

PDF 29-888

Krautite Image

Images:

Krautite

Comments: Pale pink aggregates of krautite on greenish colored matrix.
Location: Jachymov, Bohemia, Zapadocesky, Czech Republic. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Krautite Crystallography

Axial Ratios:

a:b:c =0.5021:1:0.4261

Cell Dimensions:

a = 8.012, b = 15.956, c = 6.8, Z = 8; beta = 96.6° V = 863.55 Den(Calc)= 3.54

Crystal System:

Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 2₁

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

By Intensity(I/I_o): 3.273(1), 3.862(1), 7.96(1),

Physical Properties of Krautite

Cleavage:

{010} Perfect, {101} Good, {101} Distinct

Color:

Light pink.

Density:

3.3

Hardness:

4 - Fluorite

Streak:

white

Optical Properties of Krautite

Gladstone-Dale:

CI meas= -0.007 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.061 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1831,KPDmeas= 0.1965,KC= 0.1951
Ncalc = 1.64 - 1.69

Optical Data:

Biaxial (+), a=1.62, b=1.639, g=1.686, bire=0.0660, 2V(Calc)=68, 2V(Meas)=65.

Calculated Properties of Krautite

Electron Density:

Bulk Density (Electron Density)=3.16 gm/cc
note: Specific Gravity of Krautite =3.30 gm/cc.

Fermion Index:

Fermion Index = 0.0002030688
Boson Index = 0.9997969312

Photoelectric:

PE_Krautite= 28.28 barns/electron
U=PE_Krautite x rElectron Density= 89.32 barns/cc.

Radioactivity:

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

Krautite Classification

Dana Class:

39.01.03.01 (39)Hydrated Acid Phosphates, etc

(39.01)A+ [HXO4] ï¿½ x(H2O)

(39.01.03)Dana Group

39.01.03.01 Krautite MnAsO3(OH)2•(H2O) P 2₁ 2

Strunz Class:

08.CB.15 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.15 Fluckite CaMn(HAsO4)2•2(H2O) P1 1

08.CB.15 Krautite MnAsO3(OH)2•(H2O) P 2₁ 2

Other Krautite 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 Krautite :
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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Print or Cut-and-Paste your Krautite Specimen Label here :

Krautite

MnAs+++++O3(OH)2•(H2O)
Dana No: 39.01.03.01 Strunz No: 08.CB.15
Locality:

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