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Shcherbakovite

A valid IMA mineral species - grandfathered
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About ShcherbakoviteHide

04338010014947006423555.jpg
Dmitri Ivanovich Shcherbakov (1893-1966)
Formula:
(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Colour:
Dark brown
Lustre:
Vitreous, Greasy
Hardness:
Specific Gravity:
2.968
Crystal System:
Orthorhombic
Member of:
Name:
Named by E.M. Es'kova and M.E. Kazakova in 1954 in honor of Dmitri Ivanovich Shcherbakov (13 January 1893 - 25 May 1966, Moscow, Russia) geochemist and mineralogist.
Batisite Group.
Easily confused with batisite.

Note: the "shcherbakovite" described by Mitchell (1990) is in fact noonkanbahite.


Unique IdentifiersHide

Mindat ID:
3635
Long-form identifier:
mindat:1:1:3635:7
GUID
(UUID V4):
3d957aea-3053-406e-a8a5-34e20e170291

IMA Classification of ShcherbakoviteHide

Approved, 'Grandfathered' (first described prior to 1959)
IMA Formula:
K2NaTi2O(OH)Si4O12
First published:
1954

Classification of ShcherbakoviteHide

9.DH.20

9 : SILICATES (Germanates)
D : Inosilicates
H : Inosilicates with 4-periodic single chains, Si4O12
65.3.4.2

65 : INOSILICATES Single-Width,Unbranched Chains,(W=1)
3 : Single-Width Unbranched Chains, W=1 with chains P=4
17.8.13

17 : Silicates Containing other Anions
8 : Silicates with niobate or tantalate

Mineral SymbolsHide

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

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

Physical Properties of ShcherbakoviteHide

Vitreous, Greasy
Transparency:
Opaque
Colour:
Dark brown
Hardness:
6½ on Mohs scale
Hardness:
VHN100=731 - 845 - Vickers
Tenacity:
Brittle
Cleavage:
Poor/Indistinct
Two directions, observed microscopically, may be parting.
Fracture:
Irregular/Uneven
Density:
2.968 g/cm3 (Measured)    3.194 g/cm3 (Calculated)

Optical Data of ShcherbakoviteHide

Type:
Biaxial (-)
RI values:
nα = 1.707 nβ = 1.745 nγ = 1.776
2V:
Measured: 82° , Calculated: 82°
Max Birefringence:
δ = 0.069
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r > v
Pleochroism:
Visible
Comments:
X = pale yellow; Y = yellow; Z = brownish yellow.

Chemistry of ShcherbakoviteHide

Mindat Formula:
(K,Ba)KNa(Ti,Nb)2(Si4O12)O2
Common Impurities:
Zr,Al,Fe,Ta,Mn,Mg,Ca,Cl,H2O

Crystallography of ShcherbakoviteHide

Crystal System:
Orthorhombic
Class (H-M):
mmm (2/m 2/m 2/m) - Dipyramidal
Space Group:
Imma
Setting:
Imma
Cell Parameters:
a = 10.55 Å, b = 13.92 Å, c = 8.1 Å
Ratio:
a:b:c = 0.758 : 1 : 0.582
Unit Cell V:
1,189.53 ų (Calculated from Unit Cell)
Z:
4

Crystal StructureHide

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IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0005885ShcherbakoviteUvarova Y A, Sokolova E V, Hawthorne F C, Liferovich R P, Mitchell R H (2003) The crystal chemistry of shcherbakovite from the Khibina Massif, Kola Peninsula, Russia The Canadian Mineralogist 41 1193-12012003Khibina Massif, Kola Peninsula, Russia0293
CIF Raw Data - click here to close

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
2.90 Å(100)
1.081 Å(100)
2.64 Å(70)
1.688 Å(70)
1.576 Å(60)
3.39 Å(50)
2.04 Å(50)
1.538 Å(50)
Comments:
Apatitovyi Tsirk, Rasvumchorr Mine, Khibiny Massif, Russia. The data are from the type description.

Geological EnvironmentHide

Paragenetic Mode(s):
Paragenetic ModeEarliest Age (Ga)
Stage 3a: Earth’s earliest Hadean crust>4.50
7 : Ultramafic igneous rocks
Stage 4b: Highly evolved igneous rocks>3.0
35 : Ultra-alkali and agpaitic igneous rocks

Type Occurrence of ShcherbakoviteHide

General Appearance of Type Material:
Crystals are long prismatic, to 6 cm; terminated crystals are uncommon.
Place of Conservation of Type Material:
A.E. Fersman Mineralogical Museum, Russian Academy of Sciences, Moscow, Russia; 57256.
Geological Setting of Type Material:
In a pegmatite in alkalic rocks.
Associated Minerals at Type Locality:
Reference:
Es'kova, E.M., Kazakova, M.E. (1954) Shcherbakovite - a new mineral. Doklady Akademii Nauk SSSR: 99: 837-840.

Synonyms of ShcherbakoviteHide

Other Language Names for ShcherbakoviteHide

Relationship of Shcherbakovite to other SpeciesHide

Member of:
Other Members of this group:
BatisiteBaNaNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
NoonkanbahiteBaKNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma

Common AssociatesHide

Associated Minerals Based on Photo Data:
2 photos of Shcherbakovite associated with AegirineNaFe3+Si2O6

Related Minerals - Strunz-mindat GroupingHide

9.DH.Gageite-2M(Mn,Mg,Zn)42Si16O54(OH)40Mon. 2/m
9.DH.BavsiiteBa2V2O2[Si4O12]Tet. 4/m : I4/m
9.DH.DevilliersiteCa4Ca2Fe3+10O4[(Fe3+10Si2)O36]Tric. 1 : P1
9.DH.YuzuxiangiteSr3Fe3+(Si2O6)2(OH) · 3H2OMon. 2/m : P21/m
9.DH.LouisfuchsiteCa2(Mg4Ti2)(Al4Si2)O20Tric. 1 : P1
9.DH.05LeucophaniteNaCaBeSi2O6FOrth. 2 2 2 : P21 21 21
9.DH.10OhmiliteSr3(Ti,Fe3+)(Si4O12)(O,OH) · 2-3H2OMon. 2/m : P21/m
9.DH.15HaradaiteSrVSi2O7Orth. mmm (2/m 2/m 2/m)
9.DH.15SuzukiiteBaVSi2O7Orth.
9.DH.20BatisiteBaNaNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.20NoonkanbahiteBaKNaTi2(Si4O12)O2Orth. mmm (2/m 2/m 2/m) : Imma
9.DH.25TaikaniteSr3BaMn2+2(Si4O12)O2Mon. 2 : B2
9.DH.30KrauskopfiteBaSi2O5 · 3H2OMon. 2/m : P21/b
9.DH.35Balangeroite(Mg,Fe2+,Fe3+,Mn2+)42Si16O54(OH)40Mon. 2/m
9.DH.35GageiteMn21(Si4O12)2O3(OH)20Mon. 2/m
9.DH.40AenigmatiteNa4[Fe2+10Ti2]O4[Si12O36]Tric. 1 : P1
9.DH.40DorriteCa4(Mg3Fe3+9)O4(Si3Al8Fe3+O36)Tric.
9.DH.40HøgtuvaiteCa4[Fe2+6Fe3+6]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40KrinoviteNa2Mg4Cr3+2(Si6O18)O2Tric. 1 : P1
9.DH.40Makarochkinite(Ca,Na)4[Fe2+8Fe3+2Ti2]O4[Si8Be2Al2O36]Tric. 1 : P1
9.DH.40RhöniteCa4[Mg8Fe3+2Ti2]O4[Si6Al6O36]Tric. 1 : P1
9.DH.40SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
9.DH.40WelshiteCa4Mg9Sb3O4[Si6Be3AlFe2O36]Tric. 1 : P1
9.DH.40WilkinsoniteNa2Fe2+4Fe3+2(Si6O18)O2Tric. 1 : P1
9.DH.40LeucorhöniteCa2(Mg,Fe3+,Al)6(Si,Al)6O20Tric.
9.DH.40KuratiteCa2(Fe2+5Ti)O2[Si4Al2O18]Tric. 1 : P1
9.DH.40KhesiniteCa4(Mg3Fe3+9)O4(Fe3+9Si3)O36Tric. 1 : P1
9.DH.40UM1991-29-SiO:FeMgNaNa4(Mg5Fe3+7)O4[Si9Fe3+3O36]
9.DH.45SapphirineMg4(Mg3Al9)O4[Si3Al9O36]Mon. 2/m : P21/b
9.DH.50Khmaralite(Mg,Al,Fe)16[(Al,Si,Be)12O36]O4Mon. 2/m : P21/b
9.DH.55Surinamite(Mg,Fe)3Al4BeSi3O16Mon. 2/m
9.DH.55UM1988-26-SiO:AlMgMg4Al2O[Si3Al2O15]
9.DH.60Deerite(Fe,Mn)6(Fe,Al)3[Si6O17]O3(OH)5Mon. 2/m : P21/b
9.DH.65HowieiteNa(Fe,Mn)10(Fe,Al)2Si12O31(OH)13Tric.
9.DH.65Taneyamalite(Na,Ca)(Mn,Mg,Fe)12Si12(O,OH)44Tric.
9.DH.70JohninnesiteNa2Mn2+9Mg7(OH)8[AsO4]2[Si6O17]2Tric.
9.DH.75AgrelliteNaCa2Si4O10FTric. 1 : P1

Other InformationHide

Notes:
Insoluble in HNO3 and HCl, partly soluble in H2SO4 on heating.
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 ShcherbakoviteHide

References for ShcherbakoviteHide

Localities for ShcherbakoviteHide

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.
Australia
 
  • Western Australia
    • Derby-West Kimberley Shire
      • Noonkanbah Station
Mineralogical Magazine 1984 48 : 263-266 +2 other references
Canada
 
  • Nunavut
    • Qikiqtaaluk Region
      • Baffin Island
multistage proterozoic lamproites. ... +1 other reference
Russia
 
  • Murmansk Oblast
    • Khibiny Massif
      • Eveslogchorr Mt
Men'shikov Yu.P. et al. (2003)
Arzamastsev et al. (2008)
Pekov (1998)
      • Koashva Mt
Arzamastsev et al. (2008)
Arzamastsev et al. (2008)
[World of Stones 95:5-6 +2 other references
Pekov (1998) +1 other reference
Pekov (1998)
Am Min 79:1011 +1 other reference
        • Rasvumchorr Mine
World of Stones 95: 5-6 +2 other references
Pekov I.V. et al. (2010) +1 other reference
      • The Carbonatite Stock in the vicinity of Tul'ilukht Bay
[Mandarino +1 other reference
Pekov (1998)
Pavel.M. Kartashov (n.d.) +2 other references
Khomyakov et al. (1983) +1 other reference
    • Kovdor Massif
Moiseev et al. (2007)
    • Kovdorsky District
Akimenko et al. (2014, September)
Arzamastseva et al. (1999) +1 other reference
[World of Stones 12:49]
USA
 
  • Montana
    • Chouteau County
      • Highwood Mountains
Kuehner et al. (2003, June)
  • Wyoming
    • Sweetwater County
Hausel et al. (2001)
Mitchell R.H. and Bergman S.C. (1991)
Mitchell (1990)
Mitchell (1990)
 
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