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Kamenevite

A valid IMA mineral species
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05798720017272351266309.jpg
Kamenevite

Olenii Ruchei underground mine, Olenii Ruchei, Carbonatite Stock in the vicinity of Tul'ilukht Bay, Murmansk Oblast, Russia
05798720017272351266309.jpg
Kamenevite

Olenii Ruchei underground mine, Olenii Ruchei, Carbonatite Stock in the vicinity of Tul'ilukht Bay, Murmansk Oblast, Russia
05798720017272351266309.jpg
Kamenevite

Olenii Ruchei underground mine, Olenii Ruchei, Carbonatite Stock in the vicinity of Tul'ilukht Bay, Murmansk Oblast, Russia
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About KameneviteHide

Formula:
K2TiSi3O9 · H2O
Colour:
Colorless to white in aggregates
Lustre:
Vitreous
Hardness:
4
Specific Gravity:
2.69
Crystal System:
Orthorhombic
Member of:
Umbite Group
Name:
The mineral is named in honour of the outstanding Russian geologist Evgeniy Arsenievich Kamenev (1934–2017) who made great contribution to the geology of the Khibiny complex.
The Ti analogue of umbite.


Unique IdentifiersHide

Mindat ID:
51955
Long-form identifier:
mindat:1:1:51955:9

IMA Classification of KameneviteHide

Classification of KameneviteHide

Strunz-mindat (2026):
9.DG.20

9 : SILICATES (Germanates)
D : Inosilicates
G : Inosilicates with 3-periodic single and multiple chains

Mineral SymbolsHide

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

SymbolSourceReference for Standard
KneIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43

Physical Properties of KameneviteHide

Lustre:
Vitreous
Transparency:
Transparent
Colour:
Colorless to white in aggregates
Hardness:
4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Distinct/Good
(010) good.
Density:
2.69(2) g/cm3 (Measured)    2.698 g/cm3 (Calculated)

Optical Data of KameneviteHide

Type:
Biaxial (-)
RI values:
nα = 1.650(4) nβ = 1.678(5) nγ = 1.685(5)
2V:
Measured: 60° (10)
Max. Birefringence:
δ = 0.035
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 Âĩm 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

Chemistry of KameneviteHide

Mindat Formula:
K2TiSi3O9 · H2O
Element Weights:
Element% weight
O42.971 %
Si22.630 %
K21.002 %
Ti12.856 %
H0.541 %

Calculated from ideal end-member formula.
Elements listed:
H, K, O, Si, Ti - search for minerals with similar chemistry

Crystallography of KameneviteHide

Crystal System:
Orthorhombic
Class (H-M):
222 - Disphenoidal
Space Group:
P212121
Cell Parameters:
a = 9.9166(4) Å, b = 12.9561(5) Å, c = 7.1374(3) Å
Ratio:
a:b:c = 0.765 : 1 : 0.551
Unit Cell V:
917.02 ÅÂģ (Calculated from Unit Cell)
Z:
4

X-Ray Powder DiffractionHide

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of KameneviteHide

Type Locality:
ⓘ Olenii Ruchei underground mine, Olenii Ruchei (Olenii Creek; Oleny Ruchei), Carbonatite Stock in the vicinity of Tul'ilukht Bay, Murmansk Oblast, Russia
General Appearance of Type Material:
Lamellar crystals up to 0.02 × 0.1 × 0.3 mm and their aggregates up to 0.7 mm (Oleniy Ruchey) or grains up to 0.15 mm across (Rasvumchorr).
Place of Conservation of Type Material:
Type material is deposited in the collections of the Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia, catalogue number 5027/1
Geological Setting of Type Material:
peralkaline pegmatites
Associated Minerals at Type Locality:
AegirineErshoviteK FeldsparLamprophylliteLomonosovite
PectoliteShafranovskiteSodaliteUmbiteVilliaumite
Reference:
Pekov, Igor V., Zubkova, Natalia V., Yapaskurt, Vasiliy O., Belakovskiy, Dmitry I., Lykova, Inna S., Britvin, Sergey N., Turchkova, Anna G., Pushcharovsky, Dmitry Y. (2019) Kamenevite, K2TiSi3O9·H2O, a new mineral with microporous titanosilicate framework from the Khibiny alkaline complex, Kola peninsula, Russia. European Journal of Mineralogy, 31 (3) 557-564 doi:10.1127/ejm/2019/0031-2825

Synonyms of KameneviteHide

Other Language Names for KameneviteHide

German:Kamenevit

Relationship of Kamenevite to other SpeciesHide

Member of:
Umbite Group
Other Members of Umbite Group:
UmbiteK2(Zr,Ti)Si3O9 · H2OOrth. 222 : P212121

Related Minerals - Strunz-mindat GroupingHide

9.DG.Barrydawsonite-(Y)Na1.5Y0.5CaSi3O8(OH)Mon. 2/m : P21/b
9.DG.ParatobermoriteCa5AlSi5O16(OH) · 5H2OMon. 2/m
9.DG.CalcinaksiteKNaCa(Si4O10) · H2OTric. 1 : P1
9.DG.AlvesiteNaKZrSi6O15 · 2H2OOrth. mmm(2/m2/m2/m)
9.DG.02SteedeiteNaMn2[Si3BO9](OH)2Tric. 1 : P1
9.DG.02NolzeiteNaMn2[Si3BO9](OH)2 · 2H2OTric. 1 : P1
9.DG.05MurakamiiteLiCa2Si3O8(OH)Tric. 1 : P1
9.DG.05SeranditeNaMn2+2Si3O8(OH)Tric. 1 : P1
9.DG.05BustamiteCaMn2+(Si2O6)Tric. 1 : P1
9.DG.05PectoliteNaCa2Si3O8(OH)Tric. 1 : P1
9.DG.05TanohataiteLiMn2Si3O8(OH)Tric. 1 : P1
9.DG.05DalnegorskiteCa5Mn2+(Si3O9)2Tric. 1 : P1
9.DG.05'Wollastonite-1A'CaSiO3Tric. 1 : P1
9.DG.05WollastoniteCa3(Si3O9)Tric. 1 : P1
9.DG.05FerrobustamiteCaFe2+(Si2O6)Tric. 1
9.DG.05SchizoliteNaCaMnSi3O8(OH)Tric. 1 : P1
9.DG.07CascanditeCaScSi3O8(OH)Tric. 1
9.DG.08PlombiÃĻriteCa5Si6O16(OH)2 · 7H2OOrth.
9.DG.10ClinotobermoriteCa5Si6O17 · 5H2OMon.
9.DG.10RiversideiteCa5Si6O16(OH)2 · 2H2O Orth.
9.DG.10TobermoriteCa5Si6O17 · 5H2OMon. 2 : P21
9.DG.12JusiteNa2Ca15Al4Si16O54 · 17H2O
9.DG.12KenotobermoriteCa4Si6O15(OH)2 · 5H2OMon.
9.DG.15FoshagiteCa4(Si3O9)(OH)2Tric. 1 : P1
9.DG.20JenniteCa9(Si3O9)2(OH)8 · 8H2OTric. 1 : P1
9.DG.25ParaumbiteK3Zr2H(Si3O9)2 · nH2OOrth. mm2
9.DG.25UmbiteK2(Zr,Ti)Si3O9 · H2OOrth. 222 : P212121
9.DG.30SÃļrenseniteNa4SnBe2Si6O16(OH)4Mon. 2/m : B2/b
9.DG.32Escheite Ca2NaMnTi5[Si12O34]O2(OH)3 · 12H2OOrth. mm2 : Ama2
9.DG.35XonotliteCa6(Si6O17)(OH)2Mon. 2/m : B2/m
9.DG.40HillebranditeCa2(SiO3)(OH)2Orth. mmm(2/m2/m2/m) : Cmcm
9.DG.45ZoriteNa8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2OOrth.
9.DG.45ChivruaiiteCa4(Ti,Nb)5(Si6O17)2(OH,O)5 · 13-14H2OOrth. mmm(2/m2/m2/m) : Cmmm
9.DG.50Haineaultite(Na,Ca)5Ca(Ti,Nb)5(Si6O17)2(OH,F)8 · 5H2OOrth. 222 : C222
9.DG.55EpididymiteNa2Be2Si6O15 · H2OOrth. mmm(2/m2/m2/m) : Pnma
9.DG.60EudidymiteNa2Be2Si6O15 · H2OMon. 2/m : B2/b
9.DG.65ElpiditeNa2ZrSi6O15 · 3H2OOrth.
9.DG.65PatyniteNaKCa4[Si9O23]Tric. 1 : P1
9.DG.67WhelaniteCu2+2Ca6[Si6O17(OH)](CO3)(OH)3 · 2H2OOrth. mm2 : Pnn2
9.DG.70EnricofrancoiteKNaCaSi4O10Tric. 1 : P1
9.DG.70YusupoviteNa2Zr(Si6O15) · 2.5H2OMon. 2/m : B2/m
9.DG.70LitidioniteKNaCuSi4O10Tric. 1 : P1
9.DG.70Fenaksite(K,Na)4(Fe,Mn)2(Si4O10)2(OH,F)Tric. 1 : P1
9.DG.70ManaksiteKNaMnSi4O10Tric. 1 : P1
9.DG.75SenkevichiteCsKNaCa2TiO[Si7O18](OH)Tric. 1 : P1
9.DG.75TinaksiteK2Na(Ca,Mn2+)2TiO[Si7O18(OH)]Tric.
9.DG.75TokkoiteK2Ca4[Si7O18(OH)](OH,F)Tric.
9.DG.80FluorcanasiteK3Na3Ca5Si12O30F4 · H2OMon. m : Bm
9.DG.80CanasiteK3Na3Ca5Si12O30(OH)4Mon. m : Bm
9.DG.85MiseriteK1.5-x(Ca,Y,REE)5(Si6O15)(Si2O7)(OH,F)2 · yH2OTric.
9.DG.90FrankameniteK3Na3Ca5(Si12O30)(F,OH)4 · H2OTric. 1 : P1
9.DG.92Charoite(K,Sr)15-16(Ca,Na)32[Si6O11(O,OH)6]2[Si12O18(O,OH)12]2[Si17O25(O,OH)18]2(OH,F)4 · ~3H2OMon. 2/m : P21/m
9.DG.95YuksporiteK4(Ca,Na)14(Sr,Ba)2(â—ŧ,Mn,Fe)(Ti,Nb)4(O,OH)4(Si6O17)2(Si2O7)3(H2O,OH)3Mon. 2/m : P21/m
9.DG.97Eveslogite(Na,K,Ca,Sr,Ba)48 [(Ti,Nb,Mn,Fe2+)12Si48O144(OH)12](F,OH,Cl)14Mon. 2/m : P2/m

RadioactivityHide

Radioactivity:
Element % Content Activity (Bq/kg) Radiation Type
Uranium (U) 0.0000% 0 Îą, Îē, Îģ
Thorium (Th) 0.0000% 0 Îą, Îē, Îģ
Potassium (K) 21.0020% 6,511 Îē, Îģ

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 ÂĩSv/year. Note that natural background radiation averages around 2400 ÂĩSv/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: –

DistanceDose rateRisk
1â€Ŋcm
10â€Ŋcm
1â€Ŋm

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 InformationHide

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 KameneviteHide

References for KameneviteHide

Localities for KameneviteHide

Showing 2 localities.

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
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Locality ListHide

- 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.
Russia (TL)
 
  • Murmansk Oblast
    • Carbonatite Stock in the vicinity of Tul'ilukht Bay
      • Olenii Ruchei (Olenii Creek; Oleny Ruchei)
HÃĨlenius et al. (2017) +1 other reference
    • Rasvumchorr Mt
Pekov et al. (2019)
Quick NavTopAbout KameneviteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesRelationshipsStrunz-MindatRadioactivityOther InformationInternet Links References Localities Locality List
 
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