Mineralogy Database

Cavoite Mineral Data

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General Cavoite Information

Help on Chemical  Formula: Chemical Formula: CaV3O7
Help on Composition: Composition: Molecular Weight = 299.71 gm
   Potassium   0.26 %  K     0.31 % K2O
   Calcium    12.70 %  Ca   17.78 % CaO
   Manganese   0.18 %  Mn    0.24 % MnO
   Vanadium   47.42 %  V    77.21 % VO2
   Silicon     2.06 %  Si    4.41 % SiO2
   Oxygen     37.37 %  O
             ______        ______ 
             100.00 %       99.95 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca0.95Mn2+0.01K0.02V4+2.79Si0.22O7
Help on Environment: Environment: Microcavites in massive caryopilite and rhodocrosite in braunite Mn ore.
Help on IMA Status: IMA Status: Approved IMA 2003 (Dana # Added)
Help on Locality: Locality: Gambatesa mine, northern Appennines, Liguria, Italy. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for the composition, Ca, V, O.
Help on Synonym: Synonym: IMA2001-024

Cavoite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1.9734:1:1.9583
Help on Cell Dimensions: Cell Dimensions: a = 10.42, b = 5.28, c = 10.34, Z = 4; V = 568.88 Den(Calc)= 3.50
Help on Crystal System: Crystal System: Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 3(1)(212), 1.85(0.75)(024), 5.16(0.75)(200),2.88(0.25)(013,203), 3.45(0.25)(211,112),

Physical Properties of Cavoite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Acicular - Occurs as needle-like crystals.
Help on Habit: Habit: Aggregates - Made of numerous individual crystals or clusters.
Help on Habit: Habit: Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Cavoite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.186 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2857,KC= 0.351
Ncalc = 2.23
Help on Optical Data: Optical Data: Biaxial (?), b=2

Calculated Properties of Cavoite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Cavoite =3.50 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0024995067
Boson Index = 0.9975004933
Help on Photoelectric: Photoelectric: PECavoite = 10.89 barns/electron
U=PECavoite x relectron= 36.34 barns/cc.
Help on Radioactivity: Radioactivity:

GRapi = 3.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Cavoite per GRapi unit = 27.88 (%)

Estimated Radioactivity from Cavoite - barely detectable


Cavoite Classification

Help on  Dana Class: Dana Class: (47)Vanadium Oxysalts
  (47.02.05)Dana Group Cavoite! CaV3O7 Pnam 2/m 2/m 2/m
Help on  Strunz Class: Strunz Class: 04.HE.40 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate
  04.H - V[5,6] Vanadates
  04.HE -Phyllovanadates
04.HE.40 Cavoite! CaV3O7 Pnam 2/m 2/m 2/m

Other Cavoite Information

Help on References: References: NAME( AmMin, 88:1626) PHYS. PROP.(AmMin, 88:1626) OPTIC PROP.(AmMin, 88:1626)
Help on See Also: See Also: Links to other databases for Cavoite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info

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Dana No: Strunz No: 04.HE.40





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