Dobšináite
A valid IMA mineral species
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About Dobšináite
Formula:
Ca2Ca(AsO4)2 · 2H2O
May also be given as Ca3(AsO4)2⋅2H2O.
Type material has the empirical formula Ca2(Ca0.84Mg0.10Co0.03Ni0.02)Σ0.99[(AsO4)1.99(SO4)0.01]Σ2.00·2H2O.
Type material has the empirical formula Ca2(Ca0.84Mg0.10Co0.03Ni0.02)Σ0.99[(AsO4)1.99(SO4)0.01]Σ2.00·2H2O.
Colour:
White, pinkish, colourless
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
3.395 (Calculated)
Crystal System:
Monoclinic
Member of:
Name:
Named for the type locality - the nearby town Dobšiná, a famous mining town in the Košice Region, Slovakia and the most important accumulation of Ni arsenides and sulfarsenides in the Western Carpathians.
Ca end-member of the group. The Ca analogue of brandtite, roselite, rruffite, wendwilsonite, zincroselite, and Unnamed (Fe2+-analogue of Brandtite).
Lower-hydrate counterpart of phaunouxite and rauenthalite.
Lower-hydrate counterpart of phaunouxite and rauenthalite.
Unique Identifiers
Mindat ID:
55373
Long-form identifier:
mindat:1:1:55373:9
IMA Classification of Dobšináite
Approved
Approval year:
2021
First published:
2021
Classification of Dobšináite
8.CJ.
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Dob | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Dobšináite
Vitreous
Transparency:
Transparent, Translucent
Colour:
White, pinkish, colourless
Streak:
White
Hardness:
3 on Mohs scale
Comment:
Based on scratch tests
Tenacity:
Brittle
Cleavage:
Distinct/Good
On {010}
On {010}
Fracture:
Irregular/Uneven
Density:
3.395 g/cm3 (Calculated)
Comment:
Calculated using empirical formula. Ideal formula gives 3.405.
Optical Data of Dobšináite
Type:
Biaxial (-)
RI values:
nα = 3.405(2) nβ = 1.629(2)
2V:
Measured: 60° (20)
Max. Birefringence:
δ = 0.000
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars.
Surface Relief:
Moderate
Dispersion:
Weak (r > v)
Optical Extinction:
Extinction has an undulatory character and is parallel to the elongation or with a minimum angle.
Pleochroism:
Not Visible
Chemistry of Dobšináite
Mindat Formula:
Ca2Ca(AsO4)2 · 2H2O
May also be given as Ca3(AsO4)2⋅2H2O.
Type material has the empirical formula Ca2(Ca0.84Mg0.10Co0.03Ni0.02)Σ0.99[(AsO4)1.99(SO4)0.01]Σ2.00·2H2O.
May also be given as Ca3(AsO4)2⋅2H2O.
Type material has the empirical formula Ca2(Ca0.84Mg0.10Co0.03Ni0.02)Σ0.99[(AsO4)1.99(SO4)0.01]Σ2.00·2H2O.
Element Weights:
Elements listed:
Crystallography of Dobšináite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/b
Setting:
P21/c
Cell Parameters:
a = 5.990(2) Å, b = 13.013(4) Å, c = 5.726(2) Å
β = 108.47(3)°
β = 108.47(3)°
Ratio:
a:b:c = 0.46 : 1 : 0.44
Unit Cell V:
423.3 ų
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.197 Å | (37) |
| 5.002 Å | (33) |
| 3.443 Å | (38) |
| 3.385 Å | (66) |
| 3.249 Å | (77) |
| 3.201 Å | (42) |
| 3.026 Å | (100) |
| 2.822 Å | (60) |
Type Occurrence of Dobšináite
General Appearance of Type Material:
White to pink clusters or polycrystalline aggregates up to 1–4 mm in size consisting of densely intergrown, slightly rounded thin tabular to platy crystals up to 0.1 mm in size.
Place of Conservation of Type Material:
Mineralogical collections of the Moravian Museum, Department of Mineralogy and Petrology, Zelný trh 6, Brno, Czech Republic, catalogue number B12257
Geological Setting of Type Material:
Supergene assemblage formed by oxidation of primary Co and As-bearing ore minerals in a Ca enriched environment under relatively dry conditions.
Associated Minerals at Type Locality:
Synonyms of Dobšináite
Other Language Names for Dobšináite
Dutch:Dobšináiet
German:Dobšináit
Relationship of Dobšináite to other Species
Member of:
Other Members of Brandtite Group:
| Brandtite | Ca2Mn2+(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Kröhnkite | Na2Cu(SO4)2 · 2H2O | Mon. 2/m : P21/b |
| Roselite | Ca2Co(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Rruffite | Ca2Cu(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
| Zincroselite | Ca2Zn(AsO4)2 · 2H2O | Mon. 2/m : P21/b |
Common Associates
Associated Minerals Based on Photo Data:
| 5 photos of Dobšináite associated with Erythrite | Co3(AsO4)2 · 8H2O |
| 3 photos of Dobšináite associated with Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 2 photos of Dobšináite associated with Picropharmacolite | Ca4Mg(AsO4)2(HAsO4)2 · 11H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CJ. | Airdite | Sr(V4+O)2(PO4)2 · 4H2O |
| 8.CJ. | Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CJ. | Caesiumpharmacosiderite | CsFe4[(AsO4)3(OH)4] · 4H2O |
| 8.CJ. | Jeankempite | Ca5(AsO4)2(HAsO4)2 · 7H2O |
| 8.CJ.05 | Stercorite | (NH4)Na(PO3OH) · 4H2O |
| 8.CJ.10 | Swaknoite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.10 | Mundrabillaite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.15 | Nabaphite | NaBaPO4 · 9H2O |
| 8.CJ.15 | Nastrophite | Na(Sr,Ba)PO4 · 9H2O |
| 8.CJ.20 | Haidingerite | CaHAsO4 · H2O |
| 8.CJ.25 | Rhabdophane-(Y) | YPO4 · H2O |
| 8.CJ.25 | Vladimirite | Ca4(AsO4)2(AsO3OH) · 4H2O |
| 8.CJ.27 | Churchite-(Dy) | (Dy,Sm,Gd,Nd)PO4 · 2H2O |
| 8.CJ.30 | Ferrarisite | Ca5(AsO4)2(HAsO4)2 · 9H2O |
| 8.CJ.35 | Fulbrightite | Ca(VO)2(AsO4)2 · 4H2O |
| 8.CJ.35 | Machatschkiite | (Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O |
| 8.CJ.40 | Rauenthalite | Ca3(AsO4)2 · 10H2O |
| 8.CJ.40 | Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 8.CJ.45 | Brockite | (Ca,Th,Ce)PO4 · H2O |
| 8.CJ.45 | Smirnovskite | (Th,Ca)PO4 · nH2O |
| 8.CJ.45 | Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O |
| 8.CJ.45 | Rhabdophane-(La) | La(PO4) · H2O |
| 8.CJ.45 | Rhabdophane-(Nd) | Nd(PO4) · H2O |
| 8.CJ.45 | Tristramite | (Ca,U,Fe)(PO4,SO4) · 2H2O |
| 8.CJ.45 | Grayite | (Th,Pb,Ca)(PO4) · H2O |
| 8.CJ.45 | Štěpite | U(AsO3OH)2 · 4H2O |
| 8.CJ.47 | Vysokýite | U4+[AsO2(OH)2]4 · 4H2O |
| 8.CJ.50 | Churchite-(Y) | Y(PO4) · 2H2O |
| 8.CJ.50 | Brushite | Ca(PO3OH) · 2H2O |
| 8.CJ.50 | Ardealite | Ca2(PO3OH)(SO4) · 4H2O |
| 8.CJ.50 | Pharmacolite | Ca(HAsO4) · 2H2O |
| 8.CJ.50 | Churchite-(Nd) | Nd(PO4) · 2H2O |
| 8.CJ.55 | Mcnearite | NaCa5(AsO4)(HAsO4)4 · 4H2O |
| 8.CJ.60 | Dorfmanite | Na2(PO3OH) · 2H2O |
| 8.CJ.65 | Sincosite | Ca(VO)2(PO4)2 · 5H2O |
| 8.CJ.65 | Bariosincosite | Ba(VO)2(PO4)2 · 4H2O |
| 8.CJ.70 | Catalanoite | Na2(PO3OH) · 8H2O |
| 8.CJ.75 | Guérinite | Ca6(HAsO4)3(AsO4)2 · 10.5H2O |
| 8.CJ.85 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O |
Fluorescence of Dobšináite
Does not fluoresce under either short- or long-wave UV
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.
Internet Links for Dobšináite
mindat.org URL:
https://www.mindat.org/min-55373.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Dobšináite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 60. Mineralogical Magazine, 1-5 doi:10.1180/mgm.2021.30
Localities for Dobšináite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for references and further information on this occurrence.
? - Indicates mineral may be doubtful at this locality.
- Good crystals or important locality for species.
- World class for species or very significant.
(TL) - Type Locality for a valid mineral species.
(FRL) - First Recorded Locality for everything else (eg varieties).
All localities listed without proper references should be considered as questionable.
Morocco | |
| Gerhard Möhn Collection Analyzed by ... |
Slovakia (TL) | |
| Sejkora et al. (2021) +1 other reference |
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Dionýz mine, Zemberg-Terézia vein system, Dobšiná mining district, Dobšiná, Rožňava District, Košice Region, Slovakia