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Shafranovskite

A valid IMA mineral species
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07732430017271926509882.jpg
Shafranovskite, etc.

Apatitovyi Tsirk, Rasvumchorr Mine, Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
09386370017271926539099.jpg
Shafranovskite, etc.

Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
08177470017271926574595.jpg
Shafranovskite

Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
07732430017271926509882.jpg
Shafranovskite, etc.

Apatitovyi Tsirk, Rasvumchorr Mine, Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
09386370017271926539099.jpg
Shafranovskite, etc.

Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
08177470017271926574595.jpg
Shafranovskite

Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
07732430017271926509882.jpg
Shafranovskite, etc.

Apatitovyi Tsirk, Rasvumchorr Mine, Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
00934790017271926632992.jpg
Shafranovskite, etc.

Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
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About ShafranovskiteHide

03691470017271926668965.jpg
Academician Illarion Illarionovich Shafranovskii
Formula:
Na3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2O
Colour:
Dark green to olive-green
Lustre:
Vitreous
Hardness:
2 - 3
Specific Gravity:
2.76 - 2.78
Crystal System:
Trigonal
Name:
Named after Ilarion Ilarionovich Shafranovskiy (Иларион Иларионович Шафрановский) (24 March 1907, St. Petersburg , Russian Empire - 1 July 1994), Professor of Mineralogy and Crystallography, Mining Institute, St. Petersburg, Russia.

Visually resembles zakharovite, UM1990-85-SiO:AlCaFeHMnNa, UM1990-89-SiO:CaFFeHKNa, UM1990-93-SiO:FeHNa, and UM1990-94-SiO:FFeHNaTi.


Unique IdentifiersHide

Mindat ID:
3629
Long-form identifier:
mindat:1:1:3629:6

IMA Classification of ShafranovskiteHide

Classification of ShafranovskiteHide

Strunz-mindat (2025):
9.EE.65

9 : SILICATES (Germanates)
E : Phyllosilicates
E : Single tetrahedral nets of 6-membered rings connected by octahedral nets or octahedral bands
Dana 8th ed.:
78.3.2.1

78 : Unclassified Silicates
3 :
Hey's CIM Ref.:
14.18.5

14 : Silicates not Containing Aluminum
18 : Silicates of Mn and Na, K, Mg, Ca or Fe

Mineral SymbolsHide

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

Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.

SymbolSourceReference
SfnIMA–CNMNCWarr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43
SfnWarr (2020)Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30

Physical Properties of ShafranovskiteHide

Lustre:
Vitreous
Transparency:
Translucent
Comment:
Vitreous to tarnished
Colour:
Dark green to olive-green
Comment:
Alters to greenish yellow, then to ochre-yellow
Streak:
Green to yellow
Hardness:
2 - 3 on Mohs scale
Cleavage:
Perfect
on (0001)
Fracture:
Conchoidal
Density:
2.76 - 2.78 g/cm3 (Measured)    2.83 g/cm3 (Calculated)

Optical Data of ShafranovskiteHide

Type:
Uniaxial (-)
RI values:
nω = 1.587(2) nε = 1.570(2)
Max. Birefringence:
δ = 0.017
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.

Surface Relief:
Moderate

Chemistry of ShafranovskiteHide

Mindat Formula:
Na3K2(Mn,Fe,Na)4[Si9(O,OH)27](OH)2 · nH2O
Element Weights:
Element% weight
O43.488 %
Si22.902 %
Mn19.911 %
K7.085 %
Na6.249 %
H0.365 %

Calculated from ideal end-member formula.
Elements listed:
Fe, H, K, Mn, Na, O, Si - search for minerals with similar chemistry
Common Impurities:
Ti,Al,Mg,Ca

Crystallography of ShafranovskiteHide

Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
P3 1c
Cell Parameters:
a = 14.519(3) Å, c = 21.062(6) Å
Ratio:
a:c = 1 : 1.451
Unit Cell V:
3,845.06 ų (Calculated from Unit Cell)
Z:
6
Morphology:
Aggregates (up to 5mm in diameter of olive-green equant grains (up to 0.,1 mm)

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
10.54 Å(100)
3.51 Å(70)
2.787 Å(60)
2.975 Å(50b)
3.60 Å(45b)
10.77 Å(35)

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 ShafranovskiteHide

Co-Type Localities:
ⓘ Rasvumchorr Mt, Khibiny Massif, Murmansk Oblast, Russia
ⓘ Yubileinaya pegmatite, Karnasurt Mountain, Lovozersky District, Murmansk Oblast, Russia
General Appearance of Type Material:
granular aggregates, to 5 mm.
Place of Conservation of Type Material:
Geology Museum, Kola Branch, Academy of Sciences, Apatity, 5713/1; Mining Institute, St. Petersburg, 1202/1; Vernasdsky Geological Institute, 57772; A.E. Fersman Mineralogical Museum, Academy of Sciences, Moscow, Russia, 81593.
Geological Setting of Type Material:
A sodalite-nepheline-aegirine-microcline vein in urtite
Reference:
Khomyakov, A.P., Vrublevskaya, Z.V., Zvyagin, B.B., Mateeva, N.A., Piloyan, G.O. (1982) Shafranovskite (Na,K)6(Mn,Fe)3Si9O24·6H2O, a new mineral. Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva: 111(4): 475-480.

Synonyms of ShafranovskiteHide

Other Language Names for ShafranovskiteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
3 photos of Shafranovskite associated with AegirineNaFe3+Si2O6
2 photos of Shafranovskite associated with VilliaumiteNaF
2 photos of Shafranovskite associated with Lamprophyllite(Na,Mn2+)3(Sr,Na)2(Ti,Fe3+)3(Si2O7)2O2(OH,O,F)2
2 photos of Shafranovskite associated with MicroclineK(AlSi3O8)
2 photos of Shafranovskite associated with NephelineNa3K(Al4Si4O16)
1 photo of Shafranovskite associated with EudialyteNa15Ca6Fe3Zr3Si(Si25O73)(O,OH,H2O)3(Cl,OH)2

Related Minerals - Strunz-mindat GroupingHide

9.EE.CairncrossiteSr2Ca7-xNa2x(Si4O10)4(OH)2(H2O)15-xTric. 1 : P1
9.EE.05BementiteMn7Si6O15(OH)8Mon.
9.EE.07InnsbruckiteMn33(Si2O5)14(OH)38Mon. m : Bm
9.EE.10BrokenhilliteMn8Si6O15(OH)10Hex. 6mm : P63mc
9.EE.10Mcgillite(Mn,Fe)8Si6O15(OH)8Cl2Mon. 2/m : B2/m
9.EE.10FriedeliteMn2+8Si6O15(OH,Cl)10Mon. 2/m : B2/m
9.EE.10Pyrosmalite-(Mn)Mn2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.10Pyrosmalite-(Fe)Fe2+8Si6O15(OH,Cl)10Trig. 3m (3 2/m) : P3m1
9.EE.15Nelenite(Mn,Fe)16(Si12O30)(OH)14[As3+3O6(OH)3]Trig. 3m (3 2/m) : R3m
9.EE.15SchalleriteMn2+16As3Si12O36(OH)17Trig. 3m : P3m1
9.EE.20Palygorskite◻Al2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20YofortieriteMn2+Mn2+2Mn2+2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20WindhoekiteFe3+(Fe3+1.67◻0.33)Ca2◻2Si8O20(OH)2(H2O)4(OH)2 · 6H2OMon. 2/m : B2/m
9.EE.20Windmountainite◻Fe3+2Mg2◻2Si8O20(OH)2(H2O)4 · 4H2OMon. 2/m : B2/m
9.EE.20IkorskyiteKMn3+(Si4O10) · 3H2OMon. 2/m : P21/b
9.EE.20TuperssuatsiaiteFe3+Fe3+2(Na◻)◻2Si8O20(OH)2(H2O)4 · 2H2OMon. 2/m : B2/m
9.EE.20Unnamed (Na-Ca-Fe-Silicate-Hydrate)NaCa(Fe2+,Al,Mn)5[Si8O19(OH)](OH)7 · 5H2OTric. 1 : P1
9.EE.25SepioliteMg4(Si6O15)(OH)2 · 6H2OOrth. mmm (2/m 2/m 2/m) : Pnna
9.EE.25LoughliniteNa2Mg3Si6O16 · 8H2OOrth. mmm (2/m 2/m 2/m)
9.EE.25Falcondoite(Ni,Mg)4Si6O15(OH)2 · 6H2OOrth.
9.EE.25Kalifersite(K,Na)5Fe3+7Si20O50(OH)6 · 12H2OTric. 1 : P1
9.EE.30OrlymaniteCa4Mn3Si8O20(OH)6 · 2H2OHex.
9.EE.30TungusiteCa4Fe2Si6O15(OH)6Tric. 1 : P1
9.EE.30GyroliteNaCa16Si23AlO60(OH)8 · 14H2OTric. 1 : P1
9.EE.35Reyerite(Na,K)2Ca14(Si,Al)24O58(OH)8 · 6H2OTrig. 3 : P3
9.EE.35KodamaiteNa3(Ca5Na)Si16O36(OH)4F2 · (14-x)H2O Tric. 1 : P1
9.EE.35Truscottite(Ca,Mn)14Si24O58(OH)8 · 2H2OTrig.
9.EE.40NatrosiliteNa2Si2O5Mon. 2/m : P21/b
9.EE.45MakatiteNa2Si4O8(OH)2 · 4H2OMon. 2/m : P21/b
9.EE.50VarennesiteNa8Mn2Si10O25(OH,Cl)2 · 12H2OOrth. mmm (2/m 2/m 2/m) : Cmcm
9.EE.55RaiteMn2+Mn2+2Na2(◻1.75Ti0.25)Si8O20(OH)2(H2O)4 · Na(H2O)6Orth. 2 2 2 : C2 2 2
9.EE.60IntersiliteNa6Mn2+Ti[Si10O24(OH)](OH)3 · 4H2OMon.
9.EE.65ZakharoviteNa4Mn5Si10O24(OH)6 · 6H2OTrig. 3m
9.EE.70ZeophylliteCa13Si10O28(OH)2F8 · 6H2OTrig. 3 : R3
9.EE.75Minehillite(K,Na)2-3Ca28Zn4Al4Si40O112(OH)16Hex.
9.EE.80Fedorite(Na,K)2-3(Ca4Na3)Si16O38(OH,F)2 · 3.5H2OTric. 1 : P1
9.EE.80Martinite(Na,◻,Ca)12Ca4(Si,S,B)14B2O38(OH,Cl)2F2 · 4H2OTric. 1 : P1
9.EE.80EllingseniteNa5Ca6Si18O38(OH)13 · 6H2OTric. 1 : P1
9.EE.85Lalondeite(Na,Ca)6(Ca,Na)3Si16O38(F,OH)2 · 3H2OTric. 1 : P1

RadioactivityHide

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) 7.0849% 2,196 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: –

DistanceDose rateRisk
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 InformationHide

Notes:
Strongly electromagnetic
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 ShafranovskiteHide

References for ShafranovskiteHide

Localities for ShafranovskiteHide

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.

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
 
  • Murmansk Oblast
    • Khibiny Massif
Pekov (1998)
      • Koashva Mt
Pekov (1998)
Pekov (1998)
Pekov (1998) +1 other reference
        • Rasvumchorr Mine
Pekov I.V. et al. (2010)
    • Lovozersky District
      • Karnasurt Mountain
Khomyakov et al. (1982) +2 other references
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