Mineralogy Database

Vanadomalayaite Mineral Data

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General Vanadomalayaite Information

Help on Chemical  Formula: Chemical Formula: CaVOSiO4
Help on Composition: Composition: Molecular Weight = 199.10 gm
   Calcium   20.13 %  Ca   28.17 % CaO
   Vanadium  25.59 %  V    45.68 % V2O5
   Silicon   14.11 %  Si   30.18 % SiO2
   Oxygen    40.18 %  O
            ______        ______ 
            100.00 %      104.02 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaV5+SiO5
Help on Environment: Environment: Associated with calcite, quartz and haradaite in a small vein cutting ophiolitic metacherts.
Help on IMA Status: IMA Status: Approved IMA 1994
Help on Locality: Locality: Gambatesa mine, near Reppia, Val Graveglia, northern Apennines, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named to show it's chemical relationship to malayaite.
Help on Name Pronunciation: Name Pronunciation: Vanadomalayaite + Pronunciation Say VANADOMALAYAITE
Help on Synonym: Synonym: ICSD 75619
  PDF 47-1772

Vanadomalayaite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.7508:1:0.8091
Help on Cell Dimensions: Cell Dimensions: a = 6.526, b = 8.691, c = 7.032, Z = 4; beta = 113.146° V = 366.73 Den(Calc)= 3.61
Help on Crystal System: Crystal System: Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3.22(1), 2.97(0.7), 2.59(0.63),

Physical Properties of Vanadomalayaite

Help on Cleavage: Cleavage: {110} Good
Help on Color: Color: Deep red.
Help on Density: Density: 3.6
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix.
Help on Hardness: Hardness: 6 - Orthoclase
Help on Luminescence: Luminescence: Non-fluorescent.
Help on Luster: Luster: Adamantine
Help on Streak: Streak: red

Optical Properties of Vanadomalayaite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.03 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.027 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2846,KPDmeas= 0.2854,KC= 0.2772
Ncalc = 2
Help on Optical Data: Optical Data: Biaxial (+), a=1.95, g=2.105, bire=0.1550, 2V(Meas)=17-40.
Help on Pleochroism (x): Pleochroism (x): brownish red-orange.
Help on Pleochroism (y): Pleochroism (y): brownish red-orange.
Help on Pleochroism (z): Pleochroism (z): deep greenish blue.

Calculated Properties of Vanadomalayaite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.52 gm/cc
note: Specific Gravity of Vanadomalayaite =3.61 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0076917884
Boson Index = 0.9923082116
Help on Photoelectric: Photoelectric: PEVanadomalayaite = 7.89 barns/electron
U=PEVanadomalayaite x rElectron Density= 27.74 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Vanadomalayaite is Not Radioactive

Vanadomalayaite Classification

Help on  Dana Class: Dana Class: (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O
  (52.04)with cations in [6] and/or > [6] coordination
  (52.04.03)Titanite group Titanite CaTiSiO5 P 21/a 2/m Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m Vanadomalayaite CaVOSiO4 C 2/c 2/m
Help on  Strunz Class: Strunz Class: 09.AG.15 09 - SILICATES (Germanates)
  09.A - Nesosilicates
  09.AG -Nesosilicates with additional anions; cations in > [6] � [6] coordination
09.AG.15 Malayaite CaSnSiO5=CaSnOSiO4 A2/a 2/m
09.AG.15 Vanadomalayaite CaVOSiO4 C 2/c 2/m
09.AG.15 Titanite CaTiSiO5 P 21/a 2/m

Other Vanadomalayaite Information

Help on References: References: NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.80,p1075,1995) OPTIC PROP.(Am.Min.,Vol.80,p1075,1995)
Help on See Also: See Also: Links to other databases for Vanadomalayaite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Dana No: Strunz No: 09.AG.15





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