Rossite Mineral Data

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)

IMA Status:

Valid Species (Pre-IMA) 1927

Locality:

Link to MinDat.org Location Data.

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

Diaphaniety:

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= -0.053 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3333,KPDmeas= 0.3156,KC= 0.3165

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:

r_electron=2.43 gm/cc
note: r_Rossite=2.45 gm/cc.

Fermion Index

Fermion Index = 0.00124
Boson Index = 0.99876

Photoelectric:

PE_Rossite= 7.76 barns/electron
U=PE_Rossite x r_electron= 18.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Rossite is Not Radioactive

Rossite Classification

Dana Class:

47.1.1.1 (47)Vanadium Oxysalts

(47.1)(Normal VO3)

(47.1.1)Dana Group

47.1.1.1 Rossite CaV2O6·4(H2O) P1 1

47.1.1.2 Metarossite CaV2O6·2(H2O) P1 1

47.1.1.3 Ansermetite! MnV2O6·4(H2O) C 2/m 2/m

Strunz Class:

IV/G.07-50 IV - Oxides

IV/G - Vanadiumoxides (with V4+/5+) Chain vanadates with [V2O6]2-

IV/G.07 - Navajoite-Metadelrioite series

IV/G.07-10 Navajoite V2O5·3(H2O) C 2/m 2/m

IV/G.07-15 Ankinovichite! (Ni,Zn)Al4(VO3)2(OH)12(H2O)2.5 P 2₁/n 2/m

IV/G.07-20 Alvanite (Zn,Ni)Al4(VO3)2(OH)12·2(H2O) P 2₁/n 2/m

IV/G.07-30 Munirite NaVO3·(2-x)(H2O) P 2₁/a 2/m

IV/G.07-40 Metamunirite Na2[V2O6]orNaVO3 P nma 2/m 2/m 2/m

IV/G.07-45 Dickthomssenite! Mg(V2O6)·7(H2O) C 2/c 2/m

IV/G.07-48 Ansermetite! MnV2O6·4(H2O) C 2/m 2/m

IV/G.07-50 Rossite CaV2O6·4(H2O) P1 1

IV/G.07-60 Metarossite CaV2O6·2(H2O) P1 1

IV/G.07-70 Delrioite CaSrV2O6(OH)2·3(H2O) I/a or I2/a 2/m

IV/G.07-80 Metadelrioite CaSrV2O6(OH)2·(H2O) P1 1

Other Rossite Information

References:

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 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 - WWW-MINCRYST 13 -École des Mines de Paris

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Rossite

CaV2O6·4(H2O)
Dana No: 47.1.1.1 Strunz No: IV/G.07-50
Locality:

Notes: