Dravertite
A valid IMA mineral species
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About Dravertite
Petr L. Dravert
Formula:
CuMg(SO4)2
Colour:
Light-blue to colourless; light brown
Lustre:
Vitreous
Hardness:
3½
Specific Gravity:
3.508 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honor of Petr Lyudovikovich Dravert (Пётр Людо́викович Дра́верт) (4 (16) January 1879, Vyatka, Russian Empire – 12 December 1945, Omsk, USSR), mineralogist, geologist, poet, and science fiction writer, for his significant contributions to the mineralogy of Siberia and to studies of Siberian mineral deposits.
Chemically and structurally related to chalcocyanite.
Crystal structure contains chains of alternating edge-sharing octahedra, with centers occupied by Cu or Mg, the second metal forming much more regular ones. The chains are connected via isolated sulfate tetrahedra, thus forming pseudo-framework. The structure is a monoclinically distorted and cation-ordered derivative of that of chalcocyanite.
Minerals associated at the second locality (Yadovitaya fumarole) are: alumoklyuchevskite, chalcocyanite, cryptochalcite, cupromolybdite, dolerophanite, euchlorine, hematite, parawulffite, piypite, steklite, tenorite, vergasovaite, yaroshevskite, and ziesite.
Crystal structure contains chains of alternating edge-sharing octahedra, with centers occupied by Cu or Mg, the second metal forming much more regular ones. The chains are connected via isolated sulfate tetrahedra, thus forming pseudo-framework. The structure is a monoclinically distorted and cation-ordered derivative of that of chalcocyanite.
Minerals associated at the second locality (Yadovitaya fumarole) are: alumoklyuchevskite, chalcocyanite, cryptochalcite, cupromolybdite, dolerophanite, euchlorine, hematite, parawulffite, piypite, steklite, tenorite, vergasovaite, yaroshevskite, and ziesite.
Unique Identifiers
Mindat ID:
46608
Long-form identifier:
mindat:1:1:46608:0
GUID
(UUID V4):
(UUID V4):
d4e93006-dfc6-4d6f-a0fd-7c55627dd073
IMA Classification of Dravertite
Approved
Approval year:
2015
First published:
2017
Type description reference:
Pekov, Igor V., Zubkova, Natalia V., Agakhanov, Atali A., Yapaskurt, Vasiliy O., Chukanov, Nikita V., Belakovskiy, Dmitry I., Sidorov, Evgeny G., Pushcharovsky, Dmitry Y. (2017) Dravertite, CuMg(SO4)2, a new mineral species from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 29 (2) 323-330 doi:10.1127/ejm/2017/0029-2596
Classification of Dravertite
7.AB.
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
B : With medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
A : Sulfates (selenates, etc.) without additional anions, without H2O
B : With medium-sized 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 |
|---|---|---|
| Dra | 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 Dravertite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Light-blue to colourless; light brown
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
Imperfect/Fair
Fracture:
Irregular/Uneven
Density:
3.508 g/cm3 (Calculated)
Comment:
From empirical formula
Optical Data of Dravertite
Type:
Biaxial (-)
RI values:
nα = 1.624(3) nβ = 1.661(3) nγ = 1.663(3)
2V:
Measured: 35° (10)
Max Birefringence:
δ = 0.039
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Chemistry of Dravertite
Mindat Formula:
CuMg(SO4)2
Elements listed:
Crystallography of Dravertite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Cell Parameters:
a = 4.8141(3) Å, b = 8.4443(5) Å, c = 6.7731(4) Å
β = 94.598(5)°
β = 94.598(5)°
Ratio:
a:b:c = 0.57 : 1 : 0.802
Unit Cell V:
274.45 ų
Z:
2
Comment:
Space group is P21/n
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.175 Å | (68) |
| 3.666 Å | (64) |
| 3.579 Å | (63) |
| 3.443 Å | (59) |
| 2.719 Å | (41) |
| 2.637 Å | (100) |
| 2.430 Å | (68) |
| 1.791 Å | (24) |
Comments:
From Type Description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Dravertite
General Appearance of Type Material:
Crude equant crystals, up to 0.08 mm, in compact clusters or spherulitic crusts (up to 5 × 5 cm2 in area) and up to 1 cm thick, sitting on basalt matrix
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, registration number 4674/1
Geological Setting of Type Material:
Two active fumaroles (sublimate mineral)
Associated Minerals at Type Locality:
Reference:
Pekov, I.V., Zubkova, N.V., Agakhanov, A.A., Yapaskurt, V.O., Chukanov, N.V., Belakovskiy, D.I., Sidorov, E.G., Pushcharovsky, D.Y. (2017) Dravertite, CuMg(SO4)2, a new mineral species from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy: 29: 323-330.
Synonyms of Dravertite
Related Minerals - Strunz-mindat Grouping
| 7.AB. | Dagenaisite | Zn3Te6+O6 |
| 7.AB. | Andymcdonaldite | Fe2TeO6 |
| 7.AB.05 | Mikasaite | Fe2(SO4)3 |
| 7.AB.05 | Millosevichite | Al2(SO4)3 |
| 7.AB.05 | Koryakite | NaKMg2Al2(SO4)6 |
| 7.AB.10 | Chalcocyanite | CuSO4 |
| 7.AB.10 | Zinkosite | ZnSO4 |
| 7.AB.15 | Hermannjahnite | CuZn(SO4)2 |
| 7.AB.25 | Ottoite | Pb2TeO5 |
| 7.AB.55 | Mcalpineite | Cu3(Te6+O6) |
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 Dravertite
mindat.org URL:
https://www.mindat.org/min-46608.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Dravertite
Reference List:
Pekov, Igor V., Zubkova, Natalia V., Agakhanov, Atali A., Yapaskurt, Vasiliy O., Chukanov, Nikita V., Belakovskiy, Dmitry I., Sidorov, Evgeny G., Pushcharovsky, Dmitry Y. (2017) Dravertite, CuMg(SO4)2, a new mineral species from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 29 (2) 323-330 doi:10.1127/ejm/2017/0029-2596
Pekov, Igor V., Zubkova, Natalia V., Agakhanov, Atali A., Yapaskurt, Vasiliy O., Chukanov, Nikita V., Belakovskiy, Dmitry I., Sidorov, Evgeny G., Pushcharovsky, Dmitry Y. (2017) Dravertite, CuMg(SO4)2, a new mineral species from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 29 (2) 323-330 doi:10.1127/ejm/2017/0029-2596
Localities for Dravertite
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.
Italy | |
| |
Russia (TL) | |
| Pekov, Igor V., Zubkova, Natalia V., Agakhanov, Atali A., Yapaskurt, Vasiliy O., Chukanov, Nikita V., Belakovskiy, Dmitry I., Sidorov, Evgeny G., Pushcharovsky, Dmitry Y. (2017) Dravertite, CuMg(SO4)2, a new mineral species from the Tolbachik volcano, Kamchatka, Russia. European Journal of Mineralogy, 29 (2) 323-330 doi:10.1127/ejm/2017/0029-2596 |
Quick NavTopAbout DravertiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsStrunz-MindatOther InformationInternet Links References Localities Locality List
Arsenatnaya fumarole, Second scoria cone, Northern Breakthrough, Great Fissure eruption, Tolbachik Volcanic field, Milkovsky District, Kamchatka Krai, Russia