Odintsovite
A valid IMA mineral species
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About Odintsovite
Prof. M. M. Odintsov
Formula:
K2Na4Ca3Ti2Be4Si12O38
Colour:
Colorless, light pink, pink with a brownish hue, tan colored
Lustre:
Vitreous
Hardness:
5 - 5½
Specific Gravity:
2.94 - 2.98
Crystal System:
Orthorhombic
Name:
Named in honor of Mikhail Mikhailovich Odintsov (Михаил Михайлович Одинцов) (23 October (5 November) 1911, Irkutsk, Russian Empire - 12 March 1980, Irkutsk, USSR), geologist, director of the Institute of the Earth's Crust in Irkutsk, and a participant in the discovery of the Siberian Diamond Province.
Unique combination of elements. Also one of very few mineral species known to combine titanium and beryllium.
The Na analogue of nakkaalaaqite.
The Na analogue of nakkaalaaqite.
Unique Identifiers
Mindat ID:
7200
Long-form identifier:
mindat:1:1:7200:3
IMA Classification of Odintsovite
Approved
IMA Formula:
K2Na4Ca3Ti4+2Be4Si12O38
Approval year:
1994
First published:
1995
Classification of Odintsovite
9.CJ.50
9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions
9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions
61.1.5.1
61 : CYCLOSILICATES Six-Membered Rings
1 : Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
61 : CYCLOSILICATES Six-Membered Rings
1 : Six-Membered Rings with [Si6O18] rings; possible (OH) and Al substitution
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 for Standard |
|---|---|---|
| Odt | 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 Odintsovite
Vitreous
Transparency:
Transparent, Translucent
Colour:
Colorless, light pink, pink with a brownish hue, tan colored
Hardness:
5 - 5½ on Mohs scale
Cleavage:
None Observed
Density:
2.94 - 2.98 g/cm3 (Measured) 2.91 g/cm3 (Calculated)
Optical Data of Odintsovite
Type:
Biaxial (+)
RI values:
nα = 1.630(3) nβ = 1.644 nγ = 1.675(3)
2V:
Measured: 70°
Max. Birefringence:
δ = 0.045
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
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. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
Moderate
Dispersion:
r > v
Chemistry of Odintsovite
Mindat Formula:
K2Na4Ca3Ti2Be4Si12O38
Element Weights:
Chemical Analysis
Oxide wt%:
| 1 | 2 | |
|---|---|---|
| Na2O | 6.33 % | 8.57 % |
| K2O | 6.83 % | 6.86 % |
| Li2O | 0.98 % | 0.10 % |
| CaO | 12.93 % | 11.51 % |
| BeO | 7.15 % | 6.75 % |
| Al2O3 | 0.15 % | 0.11 % |
| Fe2O3 | 2.27 % | |
| TiO2 | 7.06 % | 11.42 % |
| SiO2 | 51.02 % | 52.56 % |
| Nb2O5 | 3.73 % | |
| FeO | 0.42 % | |
| SrO | 1.21 % | |
| MnO | 0.05 % | |
| Total: | 98.45 % | 99.56 % |
Empirical formulas:
| Sample ID | Empirical Formula |
|---|---|
| 1 | K2.03Li0.92(Na2.85Ca1.23)Σ4.08Ca2(Ti1.24Fe3+0.40Nb0.39)Σ2.03Be4(Si11.88Al0.04)Σ11.92O38 |
Sample references:
| ID | Type | Locality | Reference | Notes |
|---|---|---|---|---|
| 1 | Mount Nakkaalaaq, Ilímaussaq complex, Kujalleq, Greenland | Li2O and BeO calc. by stoichiometry | ||
| 2 | Type Specimen | Malyi Murun Massif, Irkutsk Oblast, Russia |
Crystallography of Odintsovite
Crystal System:
Orthorhombic
Class (H-M):
mmm(2/m2/m2/m) - Dipyramidal
Space Group:
Fddd
Setting:
Fddd
Cell Parameters:
a = 12.778(4) Å, b = 14.343(3) Å, c = 33.69(1) Å
Ratio:
a:b:c = 0.891 : 1 : 2.349
Unit Cell V:
6174 ų
Z:
8
Morphology:
Flat fanshaped, wheelshaped arrgegates.
Platy on {001}.
Platy on {001}.
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0012499 | Odintsovite | Rastsvetaeva R K, Evsyunin V G, Kashaev A A (1995) Crystal structure of a new representative of ring silicates Doklady Chemistry 340 49-51 | 1995 | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 9.23 Å | (90) |
| 4.15 Å | (10) |
| 3.30 Å | (100) |
| 3.16 Å | (100) |
| 2.53 Å | (100) |
| 2.42 Å | (100) |
| 1.668 Å | (80) |
| 1.6 32 Å | (80) |
| 1.582 Å | (90) |
| 1.309 Å | (80) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Odintsovite
General Appearance of Type Material:
Equant grains, typically 0.5-1.0 mm
Place of Conservation of Type Material:
Fersman Mineralogical Museum, Moscow.
Synonyms of Odintsovite
Other Language Names for Odintsovite
Common Associates
Associations Based on Photo Data:
| 5 photos of Odintsovite associated with Aegirine | NaFe3+Si2O6 |
| 2 photos of Odintsovite associated with Microcline | K(AlSi3O8) |
| 2 photos of Odintsovite associated with Kalsilite | KAlSiO4 |
| 1 photo of Odintsovite associated with Titanite | CaTiO(SiO4) |
| 1 photo of Odintsovite associated with K Feldspar |
Related Minerals - Strunz-mindat Grouping
| 9.CJ. | Zolotarevite | Na5Zr[Si6O15(OH)3] · 3H2O |
| 9.CJ. | 'Avdeevite' | NaAl4(Be5Li)(Si6O18)2(H2O)1-2 |
| 9.CJ. | 'Beryllocordierite-Na' | NaMg4(Al5Be)(AlSi5O18)2 · 2H2O |
| 9.CJ. | Sachanbińskiite | NaMn4(Al5Be)(AlSi5O18)2 · 2H2O |
| 9.CJ. | Nakkaalaaqite | K2[Na3Ca]LiCa2Ti2Be4Si12O38 |
| 9.CJ.05 | Johnkoivulaite-(Cs) | Cs[Be2B]Mg2Si6O18 |
| 9.CJ.05 | Beryl | Be3Al2(Si6O18) |
| 9.CJ.05 | Bazzite | Be3Sc2(Si6O18) |
| 9.CJ.05 | Ferroindialite | (Fe2+,Mg)2Al4Si5O18 |
| 9.CJ.05 va | 'Vorobyevite' | Be3Al2(Si6O18) |
| 9.CJ.05 | Stoppaniite | Be3Fe3+2(Si6O18) · H2O |
| 9.CJ.05 | Indialite | Mg2Al3(AlSi5O18) |
| 9.CJ.10 | Sekaninaite | Fe2+2Al4Si5O18 |
| 9.CJ.10 | Cordierite | Mg2Al4Si5O18 |
| 9.CJ.15a | Zirsinalite | Na6(Ca,Mn2+,Fe2+)Zr(Si6O18) |
| 9.CJ.15a | Kapustinite | Na6ZrSi6O16(OH)2 |
| 9.CJ.15a | Townendite | Na8ZrSi6O18 |
| 9.CJ.15a | Combeite | Na4.5Ca3.5Si6O17.5(OH)0.5 |
| 9.CJ.15a | Kazakovite | Na6Mn2+Ti(Si6O18) |
| 9.CJ.15a | Tisinalite | Na3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2O |
| 9.CJ.15a | Lovozerite | Na2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2O |
| 9.CJ.15a | Litvinskite | Na2(◻,Na,Mn)ZrSi6O12(OH,O)6 |
| 9.CJ.15c | Koashvite | Na6(Ca,Mn)(Ti,Fe)Si6O18 · H2O |
| 9.CJ.15b | Imandrite | Na12Ca3Fe3+2(Si6O18)2 |
| 9.CJ.25 | Baratovite | KCa7(Ti,Zr)2Li3Si12O36F2 |
| 9.CJ.25 | Aleksandrovite | KCa7Sn2Li3Si12O36F2 |
| 9.CJ.25 | Katayamalite | KLi3Ca7Ti2(SiO3)12(OH)2 |
| 9.CJ.30 | Dioptase | CuSiO3 · H2O |
| 9.CJ.35 | Kostylevite | K2Zr(Si3O9) · H2O |
| 9.CJ.40 | Petarasite | Na5Zr2(Si6O18)(Cl,OH) · 2H2O |
| 9.CJ.45 | Gerenite-(Y) | (Ca,Na)2(Y,REE)3Si6O18 · 2H2O |
| 9.CJ.55 | Mathewrogersite | Pb7FeAl3GeSi12O36(OH,H2O)6 |
| 9.CJ.60 | Pezzottaite-(Cs) | Cs(Be2Li)Al2(Si6O18) |
Radioactivity
Radioactivity:
| Element | % Content | Activity (Bq/kg) | Radiation Type |
|---|---|---|---|
| Uranium (U) | 0.0000% | 0 | α, β, γ |
| Thorium (Th) | 0.0000% | 0 | α, β, γ |
| Potassium (K) | 5.7196% | 1,773 | β, γ |
For comparison:
- Banana: ~15 Bq per fruit
- Granite: 1,000–3,000 Bq/kg
- EU exemption limit: 10,000 Bq/kg
Note: Risk is shown relative to daily recommended maximum exposure to non-background radiation of 1000 µSv/year. Note that natural background radiation averages around 2400 µSv/year so in reality these risks are probably extremely overstated! With infrequent handling and safe storage natural radioactive minerals do not usually pose much risk.
Interactive Simulator:
Note: The mass selector refers to the mass of radioactive mineral present, not the full specimen, also be aware that the matrix may also be radioactive, possibly more radioactive than this mineral!
Activity: –
| Distance | Dose rate | Risk |
|---|---|---|
| 1 cm | ||
| 10 cm | ||
| 1 m |
The external dose rate (D) from a radioactive mineral is estimated by summing the gamma radiation contributions from its Uranium, Thorium, and Potassium content, disregarding daughter-product which may have a significant effect in some cases (eg 'pitchblende'). This involves multiplying the activity (A, in Bq) of each element by its specific gamma ray constant (Γ), which accounts for its unique gamma emissions. The total unshielded dose at 1 cm is then scaled by the square of the distance (r, in cm) and multiplied by a shielding factor (μshield). This calculation provides a 'worst-case' or 'maximum risk' estimate because it assumes the sample is a point source and entirely neglects any self-shielding where radiation is absorbed within the mineral itself, meaning actual doses will typically be lower. The resulting dose rate (D) is expressed in microsieverts per hour (μSv/h).
D = ((AU × ΓU) + (ATh × ΓTh) + (AK × ΓK)) / r2 × μshield
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 Odintsovite
mindat.org URL:
https://www.mindat.org/min-7200.html
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References for Odintsovite
Localities for Odintsovite
Showing 4 localities.
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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.
Greenland | |
| Petersen (2001) |
| Petersen et al. (2001) | |
Russia (TL) | |
| Konev A A et al. (1995) +1 other reference |
| PEKOV et al. (2013) |
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Koashva Mt, Murmansk Oblast, Russia