Cuprodobrovolskyite
A valid IMA mineral species
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About Cuprodobrovolskyite
Formula:
Na4Cu(SO4)3
Colour:
light blue or greenish-bluish to almost colourless
Lustre:
Vitreous
Hardness:
3
Specific Gravity:
2.783 (Calculated)
Crystal System:
Trigonal
Name:
Named as an analogue of dobrovolskyite Na4Ca(SO4)3 with copper prevailing over calcium.
The Cu-dominant analogue of dobrovolskyite.
Cuprodobrovolskyite has Cu2+ in 7-fold coordination.
Cuprodobrovolskyite is considered as the highest-temperature phase among anhydrous Na-Cu sulfate minerals.
Cuprodobrovolskyite has Cu2+ in 7-fold coordination.
Cuprodobrovolskyite is considered as the highest-temperature phase among anhydrous Na-Cu sulfate minerals.
Unique Identifiers
Mindat ID:
470489
Long-form identifier:
mindat:1:1:470489:4
IMA Classification of Cuprodobrovolskyite
Approved
Approval year:
2022
Classification of Cuprodobrovolskyite
7.AD.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
D : With only large cations
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference for Standard |
|---|---|---|
| Cdvo | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Cuprodobrovolskyite
Vitreous
Transparency:
Transparent
Colour:
Light blue or greenish-bluish to almost colourless
Streak:
White
Hardness:
3 on Mohs scale
Density:
2.783 g/cm3 (Calculated)
Optical Data of Cuprodobrovolskyite
Type:
Uniaxial (+)
RI values:
nω = 1.509(3) nε = 1.528(3)
Max. Birefringence:
δ = 0.019
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 ”m 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 ”m 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
Pleochroism:
Non-pleochroic
Chemistry of Cuprodobrovolskyite
Mindat Formula:
Na4Cu(SO4)3
Element Weights:
Elements listed:
Chemical Analysis
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | (Na3.64K0.09Pb0.03)ÎŁ3.76(Cu0.51Ca0.22Mg0.16Zn0.07Al0.01Mn0.01)ÎŁ0.98S3.04O12 |
Sample references:
| ID | Locality | Reference | Notes |
|---|---|---|---|
| 1 | Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia | empirical formula basis: 12 O apfu |
Crystallography of Cuprodobrovolskyite
Crystal System:
Trigonal
Class (H-M):
3 - Pyramidal
Space Group:
R3
Cell Parameters:
a = 15.702(2) Å, c = 22.017(2) Å
Ratio:
a:c = 1 : 1.402
Unit Cell V:
4,701.09 Ă
Âł (Calculated from Unit Cell)
Z:
18
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 11.66 Ă | (38) |
| 7.28 Ă | (33) |
| 3.859 Ă | (100) |
| 3.702 Ă | (36) |
| 3.674 Ă | (39) |
| 3.086 Ă | (46) |
| 2.853 Ă | (99) |
| 2.615 Ă | (68) |
Comments:
From Type Description.
Type Occurrence of Cuprodobrovolskyite
General Appearance of Type Material:
coarse hexagonal tabular or equant, typically skeletal crystals up to 1 mm and their clusters or crusts up to 1.5 cm Ă 2.5 cm in area.
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, LeninskiyProspekt 18-2, Moscow 119071, Russia, registration number 5881/1
Geological Setting of Type Material:
In fumarolic pockets with temperature 350â400°C
Associated Minerals at Type Locality:
Synonyms of Cuprodobrovolskyite
Other Language Names for Cuprodobrovolskyite
Dutch:Cuprodobrovolskyiet
German:Cuprodobrovolskyit
Related Minerals - Strunz-mindat Grouping
| 7.AD. | Bubnovaite | K2Na8Ca(SO4)6 |
| 7.AD. | Dobrovolskyite | Na4Ca(SO4)3 |
| 7.AD. | Calciolangbeinite | K2Ca2(SO4)3 |
| 7.AD. | Murphyite | Pb(Te6+O4) |
| 7.AD. | KristjĂĄnite | KNa2H(SO4)2 |
| 7.AD.05 | Mascagnite | (NH4)2SO4 |
| 7.AD.05 | Arcanite | K2SO4 |
| 7.AD.10 | Mercallite | KHSO4 |
| 7.AD.15 | Misenite | K8H6(SO4)7 |
| 7.AD.20 | Letovicite | (NH4)3H(SO4)2 |
| 7.AD.25 | Thénardite | Na2SO4 |
| 7.AD.25 | Glauberite | Na2Ca(SO4)2 |
| 7.AD.30 | Metathénardite | Na2SO4 |
| 7.AD.30 | Anhydrite | CaSO4 |
| 7.AD.35 | Baryte | BaSO4 |
| 7.AD.35 | Celestine | SrSO4 |
| 7.AD.35 | Olsacherite | Pb2(Se6+O4)(SO4) |
| 7.AD.35 | Anglesite | PbSO4 |
| 7.AD.40 | Kalistrontite | K2Sr(SO4)2 |
| 7.AD.40 | Palmierite | K2Pb(SO4)2 |
| 7.AD.45 | Ivsite | Na3H(SO4)2 |
| 7.AD.55 | Markhininite | TlBi(SO4)2 |
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 Cuprodobrovolskyite
mindat.org URL:
https://www.mindat.org/min-470489.html
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References for Cuprodobrovolskyite
Localities for Cuprodobrovolskyite
Showing 1 localities.
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Russia (TL) | |
| Miyawaki et al. (2022) |
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Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia