Dymkovite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Dymkovite
Russian mineralogist Yuriy Maksimovich Dymkov (1926-2014)
Formula:
Ni(UO2)2(As3+O3)2 · 7H2O
Colour:
Bright yellow
Lustre:
Vitreous
Specific Gravity:
3.806 (Calculated)
Crystal System:
Monoclinic
Name:
Named in honour of the Russian mineralogist Yuriy Maksimovich Dymkov (Юрий Максимович Дымков) (1926-2014), a specialist in U mineralogy, the geology of U deposits, and problems of mineral formation, who was one of the first researchers of the U ores of the Belorechenskoye deposit.
Unique Identifiers
Mindat ID:
43272
Long-form identifier:
mindat:1:1:43272:8
GUID
(UUID V4):
(UUID V4):
bbf22338-77ae-4be1-a1fb-cbc04017e605
IMA Classification of Dymkovite
Approved
Approval year:
2010
First published:
2012
Type description reference:
Pekov, Igor V., Levitskiy, Viktor V., Krivovichev, Sergey V., Zolotarev, Andrey A., Chukanov, Nikita V., Bryzgalov, Igor A., Zadov, Aleksandr E. (2012) New nickel-uranium-arsenic mineral species from the oxidation zone of the Belorechenskoye deposit, Northern Caucasus, Russia: II. Dymkovite, Ni(UO2)2(As3+O3)2·7H2O, a seelite-related arsenite. European Journal of Mineralogy, 24 (5) 923-930 doi:10.1127/0935-1221/2012/0024-2219
Classification of Dymkovite
8.E0.
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
0 :
8 : PHOSPHATES, ARSENATES, VANADATES
E : Uranyl phosphates and arsenates
0 :
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 |
|---|---|---|
| Dym | 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 Dymkovite
Vitreous
Transparency:
Transparent
Colour:
Bright yellow
Streak:
Pale yellow.
Tenacity:
Brittle
Cleavage:
None Observed
Parting:
Not observed
Fracture:
Irregular/Uneven
Density:
3.806 g/cm3 (Calculated)
Comment:
Density could not be measured because of both paucity of available material and lack of heavy liquids of necessary density.
Optical Data of Dymkovite
Type:
Biaxial (-)
RI values:
nα = 1.625(2) nβ = 1.735(5) nγ = 1.745(3)
2V:
Measured: 20° (10), Calculated: 32°
Max Birefringence:
δ = 0.120
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:
High
Dispersion:
Strong, r > v.
Optical Extinction:
Y ≈ b.
Pleochroism:
Strong
Comments:
X = very pale yellowish-green, Y ≈ Z = light greenish yellow.
Comments:
Absorption: Z >= Y > X.
Chemistry of Dymkovite
Mindat Formula:
Ni(UO2)2(As3+O3)2 · 7H2O
Crystallography of Dymkovite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 17.99(3) Å, b = 7.033(7) Å, c = 6.633(9) Å
β = 99.62(11)°
β = 99.62(11)°
Ratio:
a:b:c = 2.558 : 1 : 0.943
Unit Cell V:
827 ų
Z:
2
Morphology:
Lath-shaped to acicular crystals elongated along [010].
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.93 Å | (100) |
| 4.463 Å | (34) |
| 3.523 Å | (23) |
| 3.276 Å | (21) |
| 3.008 Å | (26) |
| 2.846 Å | (27) |
Comments:
Belorechensk deposit, Russia. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] | |
| 47f : [Uranyl (U⁶⁺) minerals] |
Type Occurrence of Dymkovite
General Appearance of Type Material:
Lath-shaped to acicular bright yellow crystals; also light yellow to light greenish-yellow crusts.
Place of Conservation of Type Material:
Fersman Mineralogical Museum of the Russian Academy of Sciences, Moscow, Russia, registration number 4065/1.
Geological Setting of Type Material:
Oxidation zone mineral.
Associated Minerals at Type Locality:
Reference:
Pekov, I.V., Levitskiy, V. V., Krivovichev, S. V., Zolotarev, A. A., Chukanov, N.V., Bryzgalov, I. A., Zadov, A. E. (2012) New nickel-uranium-arsenic mineral species from the oxidation zone of the Belorechenskoye deposit, Northern Caucasus, Russia: II. Dymkovite, Ni(UO2)2(As3+O3)2·7H2O, a seelite-related arsenite. European Journal of Mineralogy: 24: 923-930.
Synonyms of Dymkovite
Fluorescence of Dymkovite
Not fluorescent.
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 Dymkovite
mindat.org URL:
https://www.mindat.org/min-43272.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Dymkovite
Reference List:
Williams, P. A., Hatert, F., Pasero, M., Mills, S. J. (2011) New minerals and nomenclature modifications approved in 2011. CNMNC Newsletter No 9. Mineralogical Magazine, 75 (4) 2535-2540 doi:10.1180/minmag.2011.075.4.2535
Pekov, Igor V., Levitskiy, Viktor V., Krivovichev, Sergey V., Zolotarev, Andrey A., Chukanov, Nikita V., Bryzgalov, Igor A., Zadov, Aleksandr E. (2012) New nickel-uranium-arsenic mineral species from the oxidation zone of the Belorechenskoye deposit, Northern Caucasus, Russia: II. Dymkovite, Ni(UO2)2(As3+O3)2·7H2O, a seelite-related arsenite. European Journal of Mineralogy, 24 (5) 923-930 doi:10.1127/0935-1221/2012/0024-2219
Localities for Dymkovite
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.
Quick NavTopAbout DymkoviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsFluorescence Other InformationInternet Links References Localities Locality List
Belorechensk deposit, Maykopsky District, Adygea, Russia