Melanovanadite Mineral Data

Melanovanadite Mineral Data
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General Melanovanadite Information

Help on Chemical Formula: Chemical Formula: CaV++++2V+++++2O10•5(H2O)
Help on Composition: Composition: Molecular Weight = 493.91 gm
   Calcium    8.11 %  Ca   11.35 % CaO
   Vanadium  41.26 %  V    73.65 % V2O5
   Hydrogen   2.04 %  H    18.24 % H2O
   Oxygen    48.59 %  O
            ______        ______ 
            100.00 %      103.24 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: CaV5+2V5+2O10•5(H2O)
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1921
Help on Locality: Locality: Mina Ragra (Minasragra), Junín, Cerro de Pasco, Pasco dept., Peru. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: From the Greek, Melano, "dark" and the composition.
Help on Name Pronunciation: Name Pronunciation: Melanovanadite + Pronunciation Say MELANOVANADITE
Help on Synonym: Synonym: ICSD 202257
  PDF 39-321
 

Melanovanadite Image

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Melanovanadite

Comments: Dark greenish-black fine-grained massive melanovanadite.
Location: Minas Ragra, near Cerro de Pasco, Junin, Peru. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Melanovanadite Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.3515:1:0.3469
Help on Cell Dimensions: Cell Dimensions: a = 6.36, b = 18.09, c = 6.276, Z = 2; alpha = 110.18°, beta = 101.62°, gamma = 82.86° V = 658.71 Den(Calc)= 2.49
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on Forms: Forms:

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Forms: ( 1 2 1) ( 1 0 1) ( 0 1 0) ( 1 1 1) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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Click Here for Large Melanovanadite Structure Window Crystal Structure:

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Konnert J A , Evans H T , American Mineralogist , 72 (1987) p.637-644, Crystal structure and crystal chemistry of melanovanadite, a natural vanadium, bronze

 

Physical Properties of Melanovanadite

Help on Cleavage: Cleavage: {010} Perfect
Help on Color: Color: Black.
Help on Density: Density: 2.55
Help on Diaphaneity: Diaphaneity: Opaque
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Sub Metallic
Help on Streak: Streak: dark red brown
 

Optical Properties of Melanovanadite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.038 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.067 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3589,KPDmeas= 0.349,KC= 0.3363
Ncalc = 1.83 - 1.86
Help on Optical Data: Optical Data: Biaxial (-), a=1.73, b=1.96, g=1.98, bire=0.2500
 

Calculated Properties of Melanovanadite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.50 gm/cc
note: Specific Gravity of Melanovanadite =2.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0013772182
Boson Index = 0.9986227818
Help on Photoelectric: Photoelectric: PEMelanovanadite = 8.81 barns/electron
U=PEMelanovanadite x rElectron Density= 22.01 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Melanovanadite is Not Radioactive
 

Melanovanadite Classification
Help on Dana Class: Dana Class: 47.03.06.01 (47)Vanadium Oxysalts
  (47.03)(Hydrated)
  (47.03.06)Dana Group
 
47.03.06.01 Melanovanadite CaV2V2O10•5(H2O) P1 1
Help on Strunz Class: Strunz Class: 04.HE.05 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.05 Melanovanadite CaV2V2O10•5(H2O) P1 1
 

Other Melanovanadite Information
Help on References: References: PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Melanovanadite :
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
15 - WWW-MINCRYST

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Print or Cut-and-Paste your Melanovanadite Specimen Label here :

Melanovanadite

CaV++++2V+++++2O10•5(H2O)
Dana No: 47.03.06.01 Strunz No: 04.HE.05
Locality:

 

Notes: