Mineralogy Database

Krautite Mineral Data

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General Krautite Information

Help on Chemical  Formula: Chemical Formula: MnAs+++++O3(OH)2•(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: Mn2+AsO3(OH)2•(H2O)
Help on Environment: Environment: Found on museum mineral specimens.
Help on IMA Status: IMA Status: Approved IMA 1975
Help on Locality: Locality: Sacarimb (Nagyag) and Cavnic (Kapnikbanya), Romania. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Francois Kraut, mineralogist, Natural History Museum, Paris, France.
Help on Name Pronunciation: Name Pronunciation: Krautite Say KRAUTITE
Help on Synonym: Synonym: ICSD 79619
  PDF 29-888

Krautite Image

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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

Help on Axial Ratios: Axial Ratios: a:b:c =0.5021:1:0.4261
Help on Cell Dimensions: Cell Dimensions: a = 8.012, b = 15.956, c = 6.8, Z = 8; beta = 96.6° V = 863.55 Den(Calc)= 3.54
Help on Crystal System: Crystal System: Monoclinic - Sphenoidal H-M Symbol (2) Space Group: P 21
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.273(1), 3.862(1), 7.96(1),

Physical Properties of Krautite

Help on Cleavage: Cleavage: {010} Perfect, {101} Good, {101} Distinct
Help on Color: Color: Light pink.
Help on Density: Density: 3.3
Help on Hardness: Hardness: 4 - Fluorite
Help on Streak: Streak: white

Optical Properties of Krautite

Help on Gladstone-Dale: 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
Help on Optical Data: 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

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.16 gm/cc
note: Specific Gravity of Krautite =3.30 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0002030688
Boson Index = 0.9997969312
Help on Photoelectric: Photoelectric: PEKrautite = 28.28 barns/electron
U=PEKrautite x rElectron Density= 89.32 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Krautite is Not Radioactive

Krautite Classification

Help on  Dana Class: Dana Class: (39)Hydrated Acid Phosphates, etc
  (39.01)A+ [HXO4] � x(H2O)
  (39.01.03)Dana Group Krautite MnAsO3(OH)2•(H2O) P 21 2
Help on  Strunz Class: 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

Help on References: References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: 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

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Dana No: Strunz No: 08.CB.15





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