Mineralogy Database

Shcherbakovite Mineral Data

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General Shcherbakovite Information

Help on Chemical  Formula: Chemical Formula: KKNaTi2O(OH)[Si4O12]
Help on Composition: Composition: Molecular Weight = 568.26 gm
   Potassium  11.42 %  K    13.76 % K2O
   Barium      5.56 %  Ba    6.21 % BaO
   Sodium      4.33 %  Na    5.84 % Na2O
   Titanium   11.80 %  Ti   19.68 % TiO2
   Niobium     7.68 %  Nb   10.99 % Nb2O5
   Silicon    19.77 %  Si   42.29 % SiO2
   Hydrogen    0.08 %  H     0.73 % H2O
   Oxygen     39.36 %  O
             ______        ______ 
             100.00 %       99.49 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: K0.66Ba0.23Na0.07KNaTi1.4Nb0.47O1.52(OH)0.46Si4O12
Help on Environment: Environment: Occurs in late hydrothermal shallowly dipping veins of natrolite. The K-dominant analog of batisite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1954
Help on Locality: Locality: Mount Rasvumchorr, Khibiny massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Dmitrii Ivanovich Shcherbakov (1893-1966), Russian mineralogist and geochemist
Help on Name Pronunciation: Name Pronunciation: Shcherbakovite + Pronunciation Say SHCHERBAKOVITE

Shcherbakovite Image

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Comments: Secondary electron image of a shcherbakovite crystal.
Location: Mount Rasvumchorr, Khibina massif, Kola Peninsula, Russia. Scale: See Image.
© Canadian Mineralogist

Shcherbakovite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7723:1:1.325
Help on Cell Dimensions: Cell Dimensions: a = 8.1538, b = 10.5569, c = 13.9882, Z = 4; V = 1,204.09 Den(Calc)= 3.13
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: I mma
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.9(1), 1.69(0.7), 2.64(0.7),

Physical Properties of Shcherbakovite

Help on Cleavage: Cleavage: {???} Good, {???} Good
Help on Color: Color: Dark brown, Reddish brown.
Help on Density: Density: 3.34
Help on Diaphaneity: Diaphaneity: Translucent to Opaque
Help on Fracture: Fracture: Brittle - Uneven - Very brittle fracture producing uneven fragments.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 6.5 - Pyrite
Help on Luster: Luster: Vitreous - Greasy
Help on Streak: Streak: rosey brown

Optical Properties of Shcherbakovite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.087 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.026 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2369,KPDmeas= 0.222,KC= 0.2432
Ncalc = 1.76 - 1.81
Help on Optical Data: Optical Data: Biaxial (-), a=1.707-1.714, b=1.745-1.746, g=1.765-1.772, bire=0.0580, 2V(Calc)=70-82, 2V(Meas)=64-90. Dispersion r < v distinct.
Help on Pleochroism (x): Pleochroism (x): colorless or pale yellow.
Help on Pleochroism (y): Pleochroism (y): yellow or yellow.
Help on Pleochroism (z): Pleochroism (z): golden yellow or brownish yellow.

Calculated Properties of Shcherbakovite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.02 gm/cc
note: Specific Gravity of Shcherbakovite =3.13 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEShcherbakovite = 38.26 barns/electron
U=PEShcherbakovite x relectron= 115.72 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 159.26 (Gamma Ray American Petroleum Institute Units)
Concentration of Shcherbakovite per GRapi unit = 0.63 (%)

Estimated Radioactivity from Shcherbakovite - barely detectable


Shcherbakovite Classification

Help on  Dana Class: Dana Class: (65)Inosilicate Single-Width Unbranched Chains, W=1
  (65.03)with chains P=4
  (65.03.04)Batisite group Batisite BaNaNaTi2O2[Si4O12] Ima2 mm2 Shcherbakovite KKNaTi2O(OH)[Si4O12] I mma 2/m 2/m 2/m Ohmilite Sr3(Ti,Fe)(Si2O6)2(O,OH)•2-3(H2O) P 21/m 2/m
Help on  Strunz Class: Strunz Class: 09.DH.20 09 - SILICATES (Germanates)
  09.D - Inosilicates* Structural terminology according to Liebau (1985)
  09.DH -Inosilicates with 4-periodic single chains, Si4O12
09.DH.20 Batisite BaNaNaTi2O2[Si4O12] Ima2 mm2
09.DH.20 Shcherbakovite KKNaTi2O(OH)[Si4O12] I mma 2/m 2/m 2/m

Other Shcherbakovite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8, CanMin 41:1193) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Shcherbakovite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Dana No: Strunz No: 09.DH.20





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