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Krautite

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Jáchymov (St Joachimsthal), Jáchymov (St Joachimsthal) District, Krušné Hory Mts (Erzgebirge), Karlovy Vary Region, Bohemia (Böhmen; Boehmen), Czech Republic
© Knut Eldjarn

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Formula:
Mn(HAsO
 
4
) · H
 
2
O
System:MonoclinicColour:rose red, rose pink, to ...
Hardness:3 - 4
Member of:Krautite Group
Name:Named by François Fontan, Marcel Orliac, and François Permingeat in 1975 in honor of François Kraut [February 8, 1907 Pinkafo, Hungary - August 28, 1983 Paris, France], mineralogist of the Musee Nationale d'Histoire Naturelle, Paris, France.
This page provides mineralogical data about Krautite.

Classification of Krautite

IMA status:Approved
Strunz 8th edition ID:7/C.05-20
Nickel-Strunz 10th (pending) edition ID:8.CB.15

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
Dana 8th edition ID:39.1.3.1

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
Hey's CIM Ref.:20.8.7

20 : Arsenates (also arsenates with phosphate, but without other anions)
8 : Arsenates of Mn
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Type Occurrence of Krautite

Type Locality:Sacarîmb (Sãcãrâmb; Szekerembe; Nagyág), Hunedoara Co., Romania
Year of Discovery:1975
Associated Minerals at type locality:
RhodochrositePharmacoliteNagyágite

Physical Properties of Krautite

Lustre:Resinous, Dull
Diaphaneity (Transparency):Translucent
Colour:rose red, rose pink, to brownish red
Hardness (Mohs):3 - 4
Hardness Data:Estimated
Comment:Hardness less than 4
Tenacity:Brittle
Cleavage:Perfect
{010} perfect micaceous; {-101} good, {101} poor
Density (measured):3.30 g/cm3
Density (calculated):3.27 g/cm3
Comment:American Mineralogist 64:1248 (1979) structure

Crystallography of Krautite

Crystal System:Monoclinic
Class (H-M):2/m - Prismatic
Space Group:P21/b {P1 1 21/b} {P21/c} {P1 21/c 1} {P21/a}
Cell Parameters:a = 8.01Å, b = 15.95Å, c = 6.80Å
β = 96.6°
Ratio:a:b:c = 0.502 : 1 : 0.426
Unit Cell Volume:V 863.01 ų (Calculated from Unit Cell)
Z:8
Comment:P21/n
X-Ray Powder Diffraction:
d-spacingIntensity
7.99 (90)
4.88 (40)
3.86 (100)
3.30 (100)
3.27 (100)
3.19 (90)
2.86 (40)
2.73 (60)
Comments:ICDD 29-888 (synthetic); 33-895

Optical Data of Krautite

Type:Biaxial (+)
RI values: nα = 1.620 nβ = 1.639 nγ = 1.686
2V:Measured: 60° to 70°, Calculated: 68°
Birefringence:0.066
Maximum Birefringence:δ = 0.066

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:r < v strong
Optical Extinction:Z ^ {-101} = 16°; X = b; elongation (+).
Pleochroism:Non-pleochroic

Chemical Properties of Krautite

Formula:
Mn(HAsO
 
4
) · H
 
2
O
Essential elements:As, H, Mn, O
All elements listed in formula:As, H, Mn, O
Analytical Data:Inercalates with alkylammonium ions (Amer Min 75: 1140}
Relationship of Krautite to other Species
Member of:Krautite Group
Other Members of Group:

- + 
Yvonite
Cu(HAsO
 
4
) · 2H
 
2
O
Related Minerals - Nickel-Strunz Grouping):

- + 
8.CB.05Serrabrancaite
MnPO
 
4
 · H
 
2
O
8.CB.10Hureaulite
(Mn,Fe)
 
5
(PO
 
4
)
 
2
(HPO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10Sainfeldite
CaCa
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10Villyaellenite
MnMn
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10UM1997-09-AsO:CaHMgZn
(Mg,Ca,Zn)
 
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10Nyholmite
Cd
 
3
Zn
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.10Miguelromeroite
MnMn
 
2
Mn
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.15Fluckite
CaMn
2+
 
(HAsO
 
4
)
 
2
 · 2H
 
2
O
8.CB.20Cobaltkoritnigite
(Co,Zn)(HAsO
 
4
) · H
 
2
O
8.CB.20Koritnigite
Zn(HAsO
 
4
) · H
 
2
O
8.CB.25Yvonite
Cu(HAsO
 
4
) · 2H
 
2
O
8.CB.30Geminite
Cu(HAsO
 
4
) · H
 
2
O
8.CB.35Schubnelite
Fe
3+
 
VO
 
4
 · H
 
2
O
8.CB.40Radovanite
Cu
 
2
Fe
3+
 
(AsO
 
4
)(HAs
3+
 
O
 
3
)
 
2
 · H
 
2
O
8.CB.45Kazakhstanite
Fe
3+
5
V
4+
3
V
5+
12
O
 
39
(OH)
 
9
 · 9H
 
2
O
8.CB.50Kolovratite
Ni
 
x
Zn
 
y
(VO
 
4
)
 
0.67(x+y)
 · nH
 
2
O
8.CB.55Irhtemite
Ca
 
4
Mg(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
8.CB.60Burgessite
Co
 
2
(HAsO
 
4
)
 
2
 · 5H
 
2
O
Related Minerals - Hey's Index Grouping:

- + 
20.8.1Sarkinite
Mn
2+
2
(AsO
 
4
)(OH)
20.8.2Eveite
Mn
2+
2
(AsO
 
4
)(OH)
20.8.3Arsenoclasite
Mn
2+
5
(AsO
 
4
)
 
2
(OH)
 
4
20.8.4Flinkite
Mn
2+
2
Mn
3+
 
(AsO
 
4
)(OH)
 
4
20.8.5Jarosewichite
Mn
2+
3
Mn
3+
 
(AsO
 
4
)(OH)
 
6
20.8.6Allactite
Mn
2+
7
(AsO
 
4
)
 
2
(OH)
 
8
20.8.8Synadelphite
Mn
2+
9
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
9
 · 2H
 
2
O
20.8.9Sterlinghillite
Mn
 
3
(AsO
 
4
)
 
2
 · 4H
 
2
O
20.8.10Geigerite
Mn
2+
5
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 10H
 
2
O
20.8.11Akrochordite
(Mn
2+
 
,Mg)
 
5
(AsO
 
4
)
 
2
(OH)
 
4
 · 4H
 
2
O
20.8.12Manganohörnesite
(Mn,Mg)
 
3
(AsO
 
4
)
 
2
 · 8H
 
2
O
20.8.13Fluckite
CaMn
2+
 
(HAsO
 
4
)
 
2
 · 2H
 
2
O
20.8.14Brandtite
Ca
 
2
(Mn
2+
 
,Mg)(AsO
 
4
)
 
2
 · 2H
 
2
O
20.8.15Parabrandtite
Ca
 
2
Mn
2+
 
(AsO
 
4
)
 
2
 · 2H
 
2
O
20.8.16Wallkilldellite-(Mn)
Ca
 
2
Mn
2+
3
(AsO
 
4
)
 
2
(OH)
 
4
 · 9H
 
2
O
20.8.17Berzeliite
NaCa
 
2
(Mg,Mn
2+
 
)
 
2
(AsO
 
4
)
 
3
20.8.18Manganberzeliite
(Ca,Na)
 
3
(Mn
2+
 
,Mg)
 
2
(AsO
 
4
)
 
3
20.8.19Magnesiochlorophoenicite
(Mg,Mn)
 
3
Zn
 
2
(AsO
 
4
)(OH,O)
 
6
20.8.20Villyaellenite
MnMn
 
2
Ca
 
2
(AsO
 
4
)
 
2
(HAsO
 
4
)
 
2
 · 4H
 
2
O
20.8.21Hematolite
(Mn,Mg,Al)
 
15
(As
5+
 
O
 
4
)
 
2
(As
3+
 
O
 
3
)(OH)
 
23
20.8.22Grischunite
NaCa
 
2
Mn
2+
5
Fe
3+
 
(AsO
 
4
)
 
6
 · 2H
 
2
O
Other Names for Krautite
Synonyms:
IMA1974-028
Other Languages:
German:Krautit
Russian:Краутит
Spanish:Krautita
Other Information
Fluorescence in UV light:Not fluorescent
Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.
References for Krautite
Reference List:

- + 
American Mineralogist (1976): 61: 503.



American Mineralogist (1979): 1248-1254; structure.



Beneke, K. & Lagaly, G. (1981): Krautite, MnHAsO4·H2O – an intracrystalline

reactive mineral. Am. Mineral., 66, 432–435.



American Mineralogist (1990): 75: 1140.


Internet Links for Krautite
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    • Localities for Krautite
    






    


    

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the  symbol to view information about a locality. 
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    (TL) indicates type locality.  ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.

    Australia
     
    

    • New South Wales
    

      • Clive Co.
    

        • Clive
    
    		Ashley, P.M. & Lottermoser, B. G. (1999): Arsenic contamination at the Mole River mine, northern New South Wales. Australian Journal of Earth Sciences, 46, 861-874.            
    Chile
     
    

    • Atacama Region
    

      • Copiapó Province
    

        • Tierra Amarilla
    

          • Pampa Larga district
    
    		analysed material from a german Museum collection
    Czech Republic
     
    

    • Bohemia (Böhmen; Boehmen)
    

      • Karlovy Vary Region
    

        • Krušné Hory Mts (Erzgebirge)
    

          • Jáchymov (St Joachimsthal) District
    

            • Jáchymov (St Joachimsthal)
    
    		Lapis 2002(7/8), 52
    Romania
     
    

    • Hunedoara Co.
    
    		Am. Min. 61, 503 (1976)
    

    • Maramures Co.
    
    		Handbook for Mineralogy, v. 4
    

    


    

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