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Dr.Evgeniy Grigor'evich Proshchenko
brownish to reddish
Vitreous, Greasy
Crystal System:
Member of:
Named in honor of Dr. Evgeniy Grigor'evich Proshchenko (1929-1996), Russian mineralogist, who found the mineral. It was first described in 1966 as a REE-bearing fluorosilicate without a name, but first characterized as a new species by Raade et al. (2009)
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Classification of Proshchenkoite-(Y)Hide

Approval Year:

9 : SILICATES (Germanates)
A : Nesosilicates
J : Nesosilicates with BO3 triangles and/or B[4], Be[4] tetrahedra, cornersharing with SiO4

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination

Physical Properties of Proshchenkoite-(Y)Hide

Vitreous, Greasy
Transparent, Translucent
brownish to reddish
orangeyellow in thin fragments
light brown
5½ on Mohs scale
Hardness Data:
None Observed
Irregular/Uneven, Conchoidal

Chemical Properties of Proshchenkoite-(Y)Hide

IMA Formula:

Crystallography of Proshchenkoite-(Y)Hide

Crystal System:
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
Cell Parameters:
a = 10.7527 Å, c = 27.4002 Å
a:c = 1 : 2.548
Unit Cell V:
2,743.59 ų (Calculated from Unit Cell)

Type Occurrence of Proshchenkoite-(Y)Hide

Place of Conservation of Type Material:
Natural History Museum, University of Oslo, catalogue number 42029.
Geological Setting of Type Material:
In pegmatites of syenitic to alkali granitic composition and also in the enclosing crystalline schists and aegirinized gneisses.
Associated Minerals at Type Locality:

Synonyms of Proshchenkoite-(Y)Hide

Other Language Names for Proshchenkoite-(Y)Hide

Relationship of Proshchenkoite-(Y) to other SpeciesHide

Member of:
Other Members of this group:
Hundholmenite-(Y)(Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48Trig. 3m : R3m
Laptevite-(Ce)Ca6(Fe2+,Mn2+)Y3REE7(SiO4)3(PO4)(B3Si3O18)(BO3)F11Trig. 3m : R3m

Related Minerals - Nickel-Strunz GroupingHide

9.AJ.05Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
9.AJ.05Ominelite(Fe2+,Mg)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
9.AJ.10Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
9.AJ.10Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
9.AJ.10Magnesiodumortierite(Mg,Ti,◻(Al,Mg)2Al4Si3O18-y(OH)yB y = 2-3Orth.
9.AJ.20BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
9.AJ.20DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
9.AJ.20Gadolinite-(Ce)(Ce,La,Nd,Y)2Fe2+Be2Si2O10Mon. 2/m
9.AJ.20Gadolinite-(Y)Y2Fe2+Be2Si2O10Mon. 2/m : P21/b
9.AJ.20Hingganite-(Ce)(Ce,REE)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.20Hingganite-(Y)(Y,REE,Ca)2(□,Fe2+)Be2[SiO4]2(OH)2Mon. 2/m : P21/b
9.AJ.20Minasgeraisite-(Y)CaBe2Y2Si2O10Mon. 2/m : P21/b
9.AJ.30Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
9.AJ.35Hundholmenite-(Y)(Y,REE,Ca,Na)15(Al,Fe3+)(CaxAs3+1-x)(Si,As5+)Si6B3(O,F)48Trig. 3m : R3m
9.AJ.40JadariteLiNaSiB3O7(OH)Mon. 2/m

Related Minerals - Dana Grouping (8th Ed.)Hide,BO4)3(OH,O),BO4)3(O,OH,F),Ca)5(SiO4,BO4)3(OH,0)Hex.

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.

References for Proshchenkoite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Raade, G, Grice, J. D., Erambert, M., Kristiansson, P.and Witzke, T. (2008) Proshchenkoite-(Y) from Russia - a new mineral species in the vicanite group: Descriptive data and crystal structure. Mineralogical Magazine ,72, 1071-1082

Internet Links for Proshchenkoite-(Y)Hide

Localities for Proshchenkoite-(Y)Hide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Russia (TL)
  • Eastern-Siberian Region
    • Sakha Republic (Saha Republic; Yakutia)
      • Polar Yakutia
        • Cherskii range system
          • Selennyakh range
            • Tommot river
Raade, G, Grice, J. D., Erambert, M., Kristiansson, P.and Witzke, T. (2008) Proshchenkoite-(Y) from Russia - a new mineral species in the vicanite group: Descriptive data and crystal structure. Mineralogical Magazine ,72, 1071-1082
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