Rossite Mineral Data

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General Rossite Information

Chemical Formula:

CaV2O6•4(H2O)

Composition:

Molecular Weight = 310.02 gm

Calcium 12.93 % Ca 18.09 % CaO

Vanadium 32.86 % V 58.67 % V₂O₅

Hydrogen 2.60 % H 23.24 % H₂O

Oxygen 51.61 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaV⁵⁺₂O₆•4(H₂O)

Environment:

In veinlets in carnotite-bearing sandstone.

IMA Status:

Valid Species (Pre-IMA) 1927

Locality:

M.E. O’Neil’s [Buckhorn] claim, Bull Pen Canyon, and at the Burro and Deremo-Snyder mines, Slick Rock district, San Miguel Co., Colorado Link to MinDat.org Location Data.

Name Origin:

Named for Clarence Samuel Ross (1880-1975), American geologist and mineralogist, U.S. Geological Survey, Washington, D.C., USA.

Name Pronunciation:

Rossite

Synonym:

ICSD 17001

PDF 42-590

Rossite Image

Images:

Rossite

Comments: Scaly crystalline rossite on silty sandstone.
Location: Buckhorn Mine, San Miguel County, Colorado, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Rossite Crystallography

Axial Ratios:

a:b:c =1.2159:1:1.2202

Cell Dimensions:

a = 8.53, b = 7.015, c = 8.56, Z = 2; alpha = 78.38°, beta = 103.38°, gamma = 65.3° V = 443.44 Den(Calc)= 2.32

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

Forms:

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

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Crystal Structure:

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Ahmed F R , Barnes W H , The Canadian Mineralogist , 7 (1963) p.713-726, The crystal structure of rossite

Physical Properties of Rossite

Cleavage:

{???} Good

Color:

Yellow.

Density:

2.45

Diaphaneity:

Transparent

Hardness:

2-3 - Gypsum-Calcite

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Optical Properties of Rossite

Gladstone-Dale:

CI meas= 0.003 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.01 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3196,KPDmeas= 0.3156,KC= 0.3165
Ncalc = 1.77 - 1.78

Optical Data:

Biaxial (-), a=1.71, b=1.77, g=1.84, bire=0.1300, 2V(Calc)=90, 2V(Meas)=70. Dispersion relatively strong.

Calculated Properties of Rossite

Electron Density:

Bulk Density (Electron Density)=2.43 gm/cc
note: Specific Gravity of Rossite =2.45 gm/cc.

Fermion Index:

Fermion Index = 0.0012477301
Boson Index = 0.9987522699

Photoelectric:

PE_Rossite= 7.76 barns/electron
U=PE_Rossite x rElectron Density= 18.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Rossite is Not Radioactive

Rossite Classification

Dana Class:

47.01.01.01 (47)Vanadium Oxysalts

(47.01)(Normal VO3)

(47.01.01)Rossite Group

47.01.01.01 Rossite CaV2O6•4(H2O) P1 1

47.01.01.02 Metarossite CaV2O6•2(H2O) P1 1

47.01.01.03 Ansermetite! MnV2O6•4(H2O) C 2/m 2/m

Strunz Class:

04.HD.05 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.H - V[5,6] Vanadates

04.HD -Inovanadates

04.HD.05 Rossite CaV2O6•4(H2O) P1 1

Other Rossite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Rossite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Google Images
6 - Google Scholar
7 - Handbook of Mineralogy (MinSocAm)
8 - Handbook of Mineralogy (UofA)
9 - MinDAT
10 - MinMax(Deutsch)
11 - MinMax(English)
12 - Mineralienatlas (Deutsch)
13 - QUT Mineral Atlas
14 - Ruff.Info
15 - WWW-MINCRYST

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

Rossite

CaV2O6•4(H2O)
Dana No: 47.01.01.01 Strunz No: 04.HD.05
Locality:

Notes: