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Cavoite Mineral Data
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General Cavoite Information
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 Chemical Formula: |
CaV3O7 |
| Composition: |
Molecular Weight = 299.71 gm |
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Potassium 0.26 % K 0.31 % K2O |
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Calcium 12.70 % Ca 17.78 % CaO |
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Manganese 0.18 % Mn 0.24 % MnO |
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Vanadium 47.42 % V 77.21 % VO2 |
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Silicon 2.06 % Si 4.41 % SiO2 |
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Oxygen 37.37 % O |
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______ ______ |
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100.00 % 99.95 % = TOTAL OXIDE |
| Empirical Formula: |
Ca0.95Mn2+0.01K0.02V4+2.79Si0.22O7 |
| Environment: |
Microcavites in massive caryopilite and rhodocrosite in braunite Mn ore. |
| IMA Status: |
Approved IMA 2003 (Dana # Added) |
| Locality: |
Gambatesa mine, northern Appennines, Liguria, Italy. Link to MinDat.org Location Data. |
| Name Origin: |
Named for the composition, Ca, V, O. |
| Synonym: |
IMA2001-024 |
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Cavoite Crystallography
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| Axial Ratios: |
a:b:c =1.9734:1:1.9583 |
| Cell Dimensions: |
a = 10.42, b = 5.28, c = 10.34, Z = 4; V = 568.88 Den(Calc)= 3.50 |
| Crystal System: |
Orthorhombic - Dipyramidal H-M Symbol (2/m 2/m 2/m) Space Group: Pnam |
| 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), |
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Physical Properties of Cavoite
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| Cleavage: |
None |
| Color: |
Colorless. |
| Diaphaneity: |
Transparent |
| Fracture: |
Brittle - Generally displayed by glasses and most non-metallic minerals. |
| Habit: |
Acicular - Occurs as needle-like crystals. |
| Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
| Habit: |
Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite) |
| Luster: |
Vitreous (Glassy) |
| Streak: |
white |
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Optical Properties of Cavoite
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| Gladstone-Dale: |
CI calc= 0.186 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2857,KC= 0.351
Ncalc = 2.23 |
| Optical Data: |
Biaxial (?), b=2 |
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Calculated Properties of Cavoite
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| Electron Density: |
Bulk Density (Electron Density)=3.34 gm/cc
note: Specific Gravity of Cavoite =3.50 gm/cc.
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| Fermion Index: |
Fermion Index = 0.0024995067
Boson Index = 0.9975004933 |
| Photoelectric: |
PECavoite = 10.89 barns/electron
U=PECavoite x relectron= 36.34 barns/cc.
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| Radioactivity: |
GRapi = 3.59 (Gamma Ray American Petroleum Institute Units)
Concentration of Cavoite per GRapi unit = 27.88 (%)
Estimated Radioactivity from Cavoite  - barely detectable
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Cavoite Classification
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| Dana Class: |
47.02.05.01 (47)Vanadium Oxysalts |
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(47.02)(VmOn) |
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(47.02.05)Dana Group |
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47.02.05.01 Cavoite! CaV3O7 Pnam 2/m 2/m 2/m |
| Strunz Class: |
04.HE.40 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate |
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04.H - V[5,6] Vanadates |
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04.HE -Phyllovanadates |
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04.HE.40 Cavoite! CaV3O7 Pnam 2/m 2/m 2/m |
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Other Cavoite Information
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| References: |
NAME( AmMin, 88:1626) PHYS. PROP.(AmMin, 88:1626) OPTIC PROP.(AmMin, 88:1626) |
| 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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Print or Cut-and-Paste your Cavoite Specimen Label here :
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Cavoite
CaV3O7
Dana No: 47.02.05.01 Strunz No: 04.HE.40
Locality:
Notes:
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