Tangeite Mineral Data

General Tangeite Information

Chemical Formula:

CaCu(VO4)(OH)

Composition:

Molecular Weight = 235.57 gm

Calcium 17.01 % Ca 23.80 % CaO

Vanadium 21.62 % V 38.60 % V₂O₅

Copper 26.98 % Cu 33.77 % CuO

Hydrogen 0.43 % H 3.82 % H₂O

Oxygen 33.96 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CaCu(VO₄)(OH)

Environment:

Secondary mineral in vanadium-bearing sandstone deposits. Forms a series with conichalcite.

IMA Status:

Valid Species (Pre-IMA) 1848

Locality:

Tange Gorge, Fergana Valley, Kyrgystan. Link to MinDat.org Location Data.

Name Origin:

Named for the locality.

Name Pronunciation:

Tangeite

Synonym:

Calciovolborthite

Tangeite Image

Images:

Tangeite

Comments: Green. rosette crystalline-aggregates of tangeite on sandstone matrix.
Location: Thompson, Grand County, Utah, USA. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

Tangeite Crystallography

Axial Ratios:

a:b:c =0.8045:1:0.6382

Cell Dimensions:

a = 7.45, b = 9.26, c = 5.91, Z = 4; V = 407.71 Den(Calc)= 3.84

Crystal System:

Orthorhombic - Disphenoidal H-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

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

By Intensity(I/I_o): 2.61(1), 2.88(1), 4.15(0.75),

Physical Properties of Tangeite

Cleavage:

{???} Perfect

Color:

Yellow, Yellow green, Olive green.

Density:

3.5

Diaphaneity:

Subtranslucent

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

3.5 - Copper Penny

Luminescence:

Non-fluorescent.

Luster:

Vitreous - Pearly

Magnetism:

Nonmagnetic

Optical Properties of Tangeite

Gladstone-Dale:

CI meas= -0.192 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.087 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2734,KPDmeas= 0.3,KC= 0.2516
Ncalc = 1.88 - 1.97

Optical Data:

Biaxial (+), a=2.01, b=2.05, g=2.09, bire=0.0800, 2V(Calc)=88, 2V(Meas)=83.

Calculated Properties of Tangeite

Electron Density:

Bulk Density (Electron Density)=3.68 gm/cc
note: Specific Gravity of Tangeite =3.84 gm/cc.

Fermion Index:

Fermion Index = 0.0009339406
Boson Index = 0.9990660594

Photoelectric:

PE_Tangeite= 18.16 barns/electron
U=PE_Tangeite x rElectron Density= 66.89 barns/cc.

Radioactivity:

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

Tangeite Classification

Dana Class:

41.05.01.06 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.05)where (A B)2 (XO4) Zq

(41.05.01)Adelite Group

41.05.01.01 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.02 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.03 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.04 Duftite-beta? PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.05 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

41.05.01.06 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.07 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.08 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.09 Arsendescloizite PbZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

41.05.01.10 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

Strunz Class:

08.BH.35 08 - PHOSPHATES, ARSENATES, VANADATES

08.B - Phosphates, etc. with Additional Anions, without H2O

08.BH -With medium-sized and large cations, (OH,etc.):RO4 = 1:1

08.BH.35 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Arsendescloizite PbZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Duftite-alpha PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Duftite-beta? PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

08.BH.35 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

08.BH.35 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

Other Tangeite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.80,p185,1995) OPTIC PROP.(Am.Min.,Vol.80,p185,1995)

See Also:

Links to other databases for Tangeite :
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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Tangeite

CaCu(VO4)(OH)
Dana No: 41.05.01.06 Strunz No: 08.BH.35
Locality:

Notes:

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