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Cobaltkoritnigite

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Formula:
(Co,Zn)(HAsO4) · H2O
System:
Triclinic
Colour:
Pale Light purple to ...
Lustre:
Sub-Vitreous, Greasy, Silky, Dull
Hardness:
2 - 3
Name:
Named by K. Schmetzer, W. Horn, and O. Medenbach in 1981 for the cobalt analog of koritnigite.
Isostructural with:
Small (1 mm or less) acicular crystals in dense radial sprays.
May be confused with erythrite.

Classification of Cobaltkoritnigite

Approved 1980
8.CB.20

8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
B : With only medium-sized cations, RO4:H2O = 1:1
39.1.4.2

39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
1 : A[HXO4]·xH2O
20.10.6

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

Year of Discovery:
1980
Geological Setting of First Recorded Material:
Oxidized cobalt ore, post-mining
Associated Minerals at First Recorded Locality:

Physical Properties of Cobaltkoritnigite

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:
3.44 g/cm3 (Calculated)
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
Z:
8
Comment:
NJMM 257 (1981)
X-Ray Powder Diffraction Data:
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
Max Birefringence:
δ = 0.059
Image 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)(HAsO4) · H2O
Essential elements:
All elements listed in formula:

Relationship of Cobaltkoritnigite to other Species

Other Members of Group:
KoritnigiteZn(HAsO4) · H2O
MagnesiokoritnigiteMg(AsO3OH)·H2O
8.CB.05SerrabrancaiteMnPO4 · H2O
8.CB.10Hureaulite(Mn,Fe)5(PO4)2(HPO4)2 · 4H2O
8.CB.10SainfelditeCaCa2Ca2(AsO4)2(HAsO4)2 · 4H2O
8.CB.10VillyaelleniteMnMn2Ca2(AsO4)2(HAsO4)2 · 4H2O
8.CB.10UM1997-09-AsO:CaHMgZn(Mg,Ca,Zn)5(AsO4)2(HAsO4)2 · 4H2O
8.CB.10NyholmiteCd3Zn2(AsO4)2(HAsO4)2 · 4H2O
8.CB.10MiguelromeroiteMnMn2Mn2(AsO4)2(HAsO4)2 · 4H2O
8.CB.15FluckiteCaMn2+(HAsO4)2 · 2H2O
8.CB.15KrautiteMn(HAsO4) · H2O
8.CB.20KoritnigiteZn(HAsO4) · H2O
8.CB.25YvoniteCu(HAsO4) · 2H2O
8.CB.30GeminiteCu(HAsO4) · H2O
8.CB.35SchubneliteFe3+VO4 · H2O
8.CB.40RadovaniteCu2Fe3+(AsO4)(HAs3+O3)2 · H2O
8.CB.45KazakhstaniteFe53+V34+V125+O39(OH)9 · 9H2O
8.CB.50KolovratiteNixZny(VO4)0.67(x+y) · nH2O
8.CB.55IrhtemiteCa4Mg(AsO4)2(HAsO4)2 · 4H2O
8.CB.60BurgessiteCo2(HAsO4)2 · 5H2O
20.10.1ErythriteCo3(AsO4)2 · 8H2O
20.10.2CobaltaustiniteCaCo(AsO4)(OH)
20.10.3RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
20.10.4β-RoseliteCa2(Co2+,Mg)(AsO4)2 · 2H2O
20.10.5WendwilsoniteCa2Mg(AsO4)2 · 2H2O
20.10.7AerugiteNi8.5(AsO4)2As5+O8
20.10.8XanthiositeNi3(AsO4)2
20.10.9AnnabergiteNi3(AsO4)2 · 8H2O
20.10.10Smolyaninovite(Co,Ni,Mg,Ca)3(Fe3+,Al)2(AsO4)4 · 11H2O
20.10.11NickelaustiniteCa(Ni,Zn)(AsO4)(OH)

Other Names for Cobaltkoritnigite

Name in Other Languages:

Other Information

Health Risks:
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

Specimens:
The following Cobaltkoritnigite specimens are currently listed for sale on minfind.com.

Localities for Cobaltkoritnigite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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)
Mineral and/or Locality  
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