Sergeevite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Sergeevite
Formula:
Ca2Mg11(CO3)9(HCO3)4(OH)4 · 6H2O
Colour:
White
Lustre:
Dull
Hardness:
3½
Specific Gravity:
2.55 - 2.87
Crystal System:
Trigonal
Name:
Named after Evgeneii Mikhailovich Sergeev (1924–1997), geological engineer, Moscow University, Moscow, Russia.
This page provides mineralogical data about Sergeevite.
Unique Identifiers
Mindat ID:
3624
Long-form identifier:
mindat:1:1:3624:1
GUID
(UUID V4):
(UUID V4):
74b2da1a-8c74-44fd-9548-22803fa685e2
IMA Classification of Sergeevite
Approved
First published:
1980
Classification of Sergeevite
5.DB.25
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
13.1.7.1
13 : ACID CARBONATES
1 : Miscellaneous
13 : ACID CARBONATES
1 : Miscellaneous
11.4.8
11 : Carbonates
4 : Carbonates of Ca
11 : Carbonates
4 : Carbonates of Ca
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 |
---|---|---|
Sge | 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 Sergeevite
Dull
Colour:
White
Hardness:
3½ on Mohs scale
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.55 - 2.87 g/cm3 (Measured) 2.64 g/cm3 (Calculated)
Optical Data of Sergeevite
Type:
Uniaxial
RI values:
nα = 1.571 nβ = 1.581
Max Birefringence:
δ = 1.571
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 Sergeevite
Mindat Formula:
Ca2Mg11(CO3)9(HCO3)4(OH)4 · 6H2O
Crystallography of Sergeevite
Crystal System:
Trigonal
Cell Parameters:
a = 19.01 Å, c = 7.82 Å
Ratio:
a:c = 1 : 0.411
Unit Cell V:
2,447.38 ų (Calculated from Unit Cell)
Z:
3
Comment:
Questionable
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
2.821 Å | (100) |
7.14 Å | (30) |
3.58 Å | (30) |
2.87 Å | (30) |
1.965 Å | (27) |
1.755 Å | (20) |
3.37 Å | (15) |
Comments:
Malyi Mukulan Sn mine, Russia. The data are 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] | |
47c : [Carbonates, phosphates, borates, nitrates] |
Type Occurrence of Sergeevite
General Appearance of Type Material:
Rhombohedral crystals, to 0.5 µm, in globular concretions and irregular veinlets.
Place of Conservation of Type Material:
Mining Institute, St. Petersburg, 1262/1; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 80181, 82947.
Geological Setting of Type Material:
Weathering product of pyroxene/garnet skarn.
Associated Minerals at Type Locality:
Reference:
Yakhontova, L.K., Ilyusnina, I.I., Stolyarova, T.I., Egorov-Tismenko, Y.K., Kuleshevich, L.V. (1980) Sergeevite, a new hydrous carbonate of magnesium and calcium. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 109(2): 217-223.
Synonyms of Sergeevite
Other Language Names for Sergeevite
German:Sergeevit
Spanish:Sergeevita
Related Minerals - Strunz-mindat Grouping
5.DB. | Grguricite | CaCr2(CO3)2(OH)4 · 4H2O |
5.DB.05 | Alumohydrocalcite | CaAl2(CO3)2(OH)4 · 4H2O |
5.DB.05 | Nasledovite | PbMn3Al4(CO3)4(SO4)O5 · 5H2O |
5.DB.05 | Para-alumohydrocalcite | CaAl2(CO3)2(OH)4 · 6H2O |
5.DB.05 | UM1977-02-CO:AlCaH | Ca6Al2(CO3)3O6 · 32H2O |
5.DB.10 | Dresserite | BaAl2(CO3)2(OH)4 · H2O |
5.DB.10 | Dundasite | PbAl2(CO3)2(OH)4 · H2O |
5.DB.10 | Montroyalite | Sr4Al8(CO3)3(OH,F)26 · 10-11H2O |
5.DB.10 | Strontiodresserite | SrAl2(CO3)2(OH)4 · H2O |
5.DB.10 | Petterdite | PbCr3+2(CO3)2(OH)4 · H2O |
5.DB.10 | Kochsándorite | CaAl2(CO3)2(OH)4 · H2O |
5.DB.10 | Unnamed (Ca-analogue of Petterdite) | CaCr3+2(CO3)2(OH)4 · H2O |
5.DB.15 | Hydrodresserite | BaAl2(CO3)2(OH)4 · 3H2O |
5.DB.20 | Schuilingite-(Nd) | PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2O |
5.DB.30 | Szymańskiite | [H3O]+8[Hg2]2+8(Ni,Mg)6[CO3]12(OH)12 · 3H2O |
5.DB.35 | Lusernaite-(Y) | Y4Al(CO3)2(OH)10F · 6H2O |
5.DB.40 | Putnisite | SrCa4Cr3+8(CO3)8SO4(OH)16 · 23H2O |
Other Information
Thermal Behaviour:
DTA curve shows three endothermic breaks at 1200, 5800, and 800°C, corresponding to losses in weight of 13%, 37%, and 6%.
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 Sergeevite
mindat.org URL:
https://www.mindat.org/min-3624.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 Sergeevite
Reference List:
Localities for Sergeevite
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).
Struck out - Mineral was erroneously reported from this locality.
Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.
All localities listed without proper references should be considered as questionable.
Russia | |
| ZVMO 109 (1980) +1 other reference |
| Yakhontova et al. (1980) +1 other reference |
Quick NavTopAbout SergeeviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
Tyrnyauz Mo-W deposit, Baksan Valley, Kabardino-Balkaria, Russia