Metamunirite Mineral Data

Metamunirite Mineral Data +

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General Metamunirite Information

Chemical Formula:

Na2[V+++++2O6] or NaVO3

Composition:

Molecular Weight = 243.86 gm

Sodium 18.85 % Na 25.42 % Na₂O

Vanadium 41.78 % V 74.58 % V₂O₅

Oxygen 39.37 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂V⁵⁺₂O₆

IMA Status:

Approved IMA 1991

Locality:

Burro mine, near Slick Rock, San Miguel County, Colorado, USA. Link to MinDat.org Location Data.

Name Origin:

Named for its relationship to munirite.

Synonym:

ICSD 29450

IMA1990-044

PDF 32-1198

Metamunirite Image

Images:

Metamunirite

Comments: Colorless, acicular crystals of metamunirite.
Location: Burro Mine, Slick Rock District, San Miguel Co., Colorado, USA. Scale: Picture size 1.6 mm.
© Thomas Witzke / Abraxas-Verlag

Metamunirite Crystallography

Axial Ratios:

a:b:c =3.8744:1:1.4684

Cell Dimensions:

a = 14.134, b = 3.648, c = 5.357, Z = 4; V = 276.21 Den(Calc)= 5.86

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P nma

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 5.01(1), 2.954(0.35), 3.532(0.25),

Physical Properties of Metamunirite

Cleavage:

[???] Perfect

Color:

Colorless.

Diaphaniety:

Transparent

Hardness:

1 - Talc

Streak:

white

Optical Properties of Metamunirite

Gladstone-Dale:

CI calc= 0.553 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1348,KC= 0.3019

Optical Data:

Biaxial (+), a=1.78, b=1.8, , 2V(Meas)=30-40.

Calculated Properties of Metamunirite

Electron Density:

r_electron=5.58 gm/cc
note: r_Metamunirite=5.86 gm/cc.

Fermion Index

Fermion Index = 0.00123
Boson Index = 0.99877

Photoelectric:

PE_Metamunirite= 8.37 barns/electron
U=PE_Metamunirite x r_electron= 46.64 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Metamunirite is Not Radioactive

Metamunirite Classification

Dana Class:

47.1.3.2 (47)Vanadium Oxysalts

(47.1)(Normal VO3)

(47.1.3)Dana Group

47.1.3.1 Munirite NaVO3·(2-x)(H2O) P 2₁/a 2/m

47.1.3.2 Metamunirite Na2[V2O6]orNaVO3 P nma 2/m 2/m 2/m

Strunz Class:

IV/G.07-40 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 Metamunirite Information

References:

NAME( Dana8) PHYS. PROP.(Am.Min.,Vol.77,p1116,1992) OPTIC PROP.(Am.Min.,Vol.77,p1116,1992)

See Also:

Links to other databases for Metamunirite :
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 -École des Mines de Paris

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Metamunirite

Na2[V+++++2O6] or NaVO3
Dana No: 47.1.3.2 Strunz No: IV/G.07-40
Locality:

Notes: