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Cobaltkoritnigite

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Formula:
(Co,Zn)(HAsO
 
4
) · H
 
2
O
System:TriclinicColour:Pale Light purple to ...
Lustre:Sub-Vitreous, Greasy, Silky, DullHardness:2 - 3
Member of:Koritnigite Group
Name:Named by K. Schmetzer, W. Horn, and O. Medenbach in 1981 for the cobalt analog of koritnigite.
Isostructural with:Koritnigite


Small (1 mm or less) acicular crystals in dense radial sprays.
May be confused with erythrite.

Classification of Cobaltkoritnigite

IMA status:Approved 1980
Strunz 8th edition ID:7/C.06-10
Nickel-Strunz 10th (pending) edition ID:8.CB.20

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:39.1.4.2

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
Hey's CIM Ref.:20.10.6

20 : Arsenates (also arsenates with phosphate, but without other anions)
10 : Arsenates of Co and Ni
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Type Occurrence of Cobaltkoritnigite

Type Locality:Schwarzenberg District, Erzgebirge, Saxony, Germany
Year of Discovery:1980
Geological Setting of type material:Oxidized cobalt ore, post-mining
Associated Minerals at type locality:
SpherocobaltiteQuartzPitticiteGlaucodotErythrite
Cobaltite

Physical Properties of Cobaltkoritnigite

Lustre:Sub-Vitreous, Greasy, Silky, Dull
Diaphaneity (Transparency):Transparent, Translucent
Colour:Pale Light purple to intense purple, pale rose red to intense purple-rose
Streak:Pale poink
Hardness (Mohs):2 - 3
Hardness Data:Estimated
Tenacity:Brittle
Cleavage:Perfect
{010 perfect; {100} good
Density (calculated):3.44 g/cm3
Comment:NJMM 257 (1981)

Crystallography of Cobaltkoritnigite

Crystal System:Triclinic
Class (H-M):1 - Pinacoidal
Space Group:P1
Space Group Setting:P1
Cell Parameters:a = 7.95Å, b = 15.83Å, c = 6.67Å
α = 90.9°, β = 96.6°, γ = 90.0°
Ratio:a:b:c = 0.502 : 1 : 0.421
Unit Cell Volume:V 833.74 ų (Calculated from Unit Cell)
Z:8
Comment:NJMM 257 (1981)
X-Ray Powder Diffraction:
d-spacingIntensity
7.94 (100)
7.07 (20)
3.82 (50)
3.25 (40)
3.23 (40)
3.14 (70)
2.69 (30)
2.46 (40)
Comments:ICDD 35-499

Optical Data of Cobaltkoritnigite

Type:Biaxial (+)
RI values: nα = 1.646 nβ = 1.668 nγ = 1.705
2V:Measured: 78° , Calculated: 78°
Birefringence:0.059
Maximum Birefringence:δ = 0.059

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Moderate
Dispersion:weak
Optical Extinction:X ^ b = 3°, Y ^ a = 12.5°
Pleochroism:Strong
Comments:X=deep violet, Y=reddish violet; Z=bluish violet

Chemical Properties of Cobaltkoritnigite

Formula:
(Co,Zn)(HAsO
 
4
) · H
 
2
O
Simplified for copy/paste:(Co,Zn)(HAsO4)·H2O
Essential elements:As, Co, H, O
All elements listed in formula:As, Co, H, O, Zn

Relationship of Cobaltkoritnigite to other Species

Member of:Koritnigite Group
Other Members of Group:

- +
Koritnigite
Zn(HAsO
 
4
) · H
 
2
O
Magnesiokoritnigite
Mg(AsO
 
3
OH)·H
 
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.15Krautite
Mn(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:

- +
20.10.1Erythrite
Co
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.10.2Cobaltaustinite
CaCo(AsO
 
4
)(OH)
20.10.3Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.4β-Roselite
Ca
 
2
(Co
2+
 
,Mg)(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.5Wendwilsonite
Ca
 
2
Mg(AsO
 
4
)
 
2
· 2H
 
2
O
20.10.7Aerugite
Ni
 
8.5
(AsO
 
4
)
 
2
As
5+
 
O
 
8
20.10.8Xanthiosite
Ni
 
3
(AsO
 
4
)
 
2
20.10.9Annabergite
Ni
 
3
(AsO
 
4
)
 
2
· 8H
 
2
O
20.10.10Smolyaninovite
(Co,Ni,Mg,Ca)
 
3
(Fe
3+
 
,Al)
 
2
(AsO
 
4
)
 
4
· 11H
 
2
O
20.10.11Nickelaustinite
Ca(Ni,Zn)(AsO
 
4
)(OH)

Other Names for Cobaltkoritnigite

Synonyms:
IMA1980-013
Other Languages:
German:Cobaltkoritnigit
Kobaltkoritnigit
Spanish:Cobaltkoritnigita

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 Cobaltkoritnigite

Reference List:

- +
Zeit. Anorg. All. Chemie (1979): 454: 134-144.

NJMM 237 (1980)

Schmetzer, K., W. Horn & O. Medenbach (1981): Über Kobaltkoritnigit, (Co,Zn)[H2O/ AsO3OH], ein neues Mineral und Pitticit, Fe2O3 · As2O5 · 9-10 H2O, ein röntgenamorphes Fe-Arsenat-Hydrat.- Neues Jahrbuch für Mineralogie, Monatshefte, 257-266.

American Mineralogist: 67: 414.

Internet Links for Cobaltkoritnigite

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Cobaltkoritnigite details from Handbook of Mineralogy (PDF)
  • Mineral Dealers:
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  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Rare and Unusual minerals at Mineralogical Research Company
  • The Arkenstone - Fine Minerals
  • Specimens:The following Cobaltkoritnigite specimens are currently listed for sale on minfind.com.

    Localities for Cobaltkoritnigite

    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (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.
    Czech Republic
     
    • Bohemia (Böhmen; Boehmen)
      • Karlovy Vary Region
        • Krušné Hory Mts (Erzgebirge)
          • Jáchymov District (St Joachimsthal)
    Lapis 2002(7/8), 63-65
        • Mariánské Lázně (Marienbad)
          • Slavkovský Les Mtn
    M.E. Ciriotti, 2006, probed EDX+XRD by S. Möckel
    Germany
     
    • Baden-Württemberg
      • Black Forest
        • Alpirsbach
    K. Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
        • Schenkenzell
          • Wittichen
            • Böckelsbach valley
    collection Joachim Esche
    Walenta: "Die Mineralien des Schwarzwaldes", Weise (Munich), 1992
            • Burgfelsen
    No reference listed
            • Heubach Valley
    No reference listed
    http://wittichen.strahlen.org/ ; Collection Elamr Lackner and many others
        • Wolfach
          • Oberwolfach
            • Rankach valley
    U. Kolitsch, J. Gröbner, G. Blaß, H.-W. Graf und A. Pring (2005): Neufunde aus der Grube Clara im mittleren Schwarzwald (II): Dreyerit, Gasparit-(Ce), Klinobisvanit, Kobaltkoritnigit, Metatyuyamunit, Roscoelith, Sengierit, Vésigniéit und Wakefieldit. Lapis 30 (9), 35-39; 58. (in German)
    • Hesse
      • Odenwald
        • Abtsteinach
          • Mackenheim
      • Richelsdorf District
        • Bauhaus
    No reference listed
        • Süss
          • Richelsdorf Smelter
    S. Weiß: "Mineralfundstellen, Deutschland West", Weise (Munich), 1992
    • Lower Saxony
      • Harz
        • Braunlage
    Weiss: "Mineralfundstellen, Deutschland West", Weise (Munich), 1990
        • St Andreasberg District
          • Oder valley
    Gröbner, J., Hajek, W., Junker, R. & Nikoleizig, J. (2011): Neue Mineralschätze des Harzes. Papierflieger Verlag GmbH, Clausthal-Zellerfeld, Germany, 127 pp.
    • Rhineland-Palatinate
      • Siegerland
        • Niederfischbach
    Weiss: "Mineralfundstellen, Deutschland West", 1990
    • Saxony
      • Erzgebirge
    Wittern, A. (2001): Mineralfundorte und ihre Minerale in Deutschland. Schweizerbart, Stuttgart, 288 pp.
        • Schneeberg District
          • Neustädtel
    Lapis 30(7/8):41-70 (2005)
    Lapis 30(7/8):41-70 (2005)
    Lapis 30(7/8):41-70 (2005)
    [Schmetzer et al: N. Jb. Miner. Mh. 1981, 257-266]
    Japan
     
    • Honshu Island
      • Kanto region
        • Tochigi Prefecture
          • Nikko City
            • Ashio-machi
    Okada et al (1994) Abstracts, IMA General Meeting, 1994, 307-308.
    Morocco
     
    • Souss-Massa-Draâ Region
      • Ouarzazate Province
        • Tazenakht
          • Bou Azer District (Bou Azzer District)
            • Aghbar
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
            • Aït Ahmane
    JP Barral collection
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
            • Bou Azer
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
            • Ightem
    Favreau, G., Dietrich, J. E., Meisser, N., Brugger, J., Ait Haddouch, L. & Maacha, L. (2007): Bou Azzer, Morocco. Mineralogical Record 38, 345-407
            • Tamdrost
    Favreau, G. and Dietrich, J. E. (2006). Die Mineralien von Bou Azzer. Lapis 31(7/8), 27-68
    Spain
     
    • Catalonia
      • Girona (Gerona)
        • Ripollès
          • Camprodon
            • Rocabruna
    Joan Rosell
    Switzerland
     
    • Wallis (Valais)
      • Anniviers Valley
        • Saint-Luc
    Ansermet, S. (2012): Mines et minéraux du Valais - II. Anniviers et Tourtemagne. With contributions by N. Meisser, Ed. Porte-plumes (Ayer)
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