Tangeite Mineral Data

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.

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 - DisphenoidalH-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),

Crystal Structure:

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Basso R , Palenzona A , Zefiro L , Neues Jahrbuch fur Mineralogie, Monatshefte , 1989 (1989) p.300-308, Crystal structure refinement of a Sr-bearing term related to copper, vanadates and arsenates of adelite and descloizite groups, Locality: Molinello mine, Val Graveglia, Northern Appenines, Eastern Liguria, Italy

Physical Properties of Tangeite

Cleavage:

[???] Perfect

Color:

Yellow, Yellow green, Olive green.

Density:

3.5

Diaphaniety:

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

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:

r_electron=3.68 gm/cc
note: r_Tangeite=3.84 gm/cc.

Fermion Index

Fermion Index = 0.00093
Boson Index = 0.99907

Photoelectric:

PE_Tangeite= 18.16 barns/electron
U=PE_Tangeite x r_electron= 66.89 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Tangeite is Not Radioactive

Tangeite Classification

Dana Class:

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

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

(41.5.1)Dana Group

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

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

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

41.5.1.4 Duftite-beta PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

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

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

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

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

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

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

Strunz Class:

VII/B.26-60 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O, OH. cations of medium and big size: Mg, Cu, Zn, and Ca, Na, K, Ba, Pb

VII/B.26 - Adelite - Duftite group

VII/B.26-10 Adelite CaMg(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-15 Gottlobite! CaMg(VO4,AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-20 Nickelaustinite Ca(Ni,Zn)(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-30 Cobaltaustinite CaCo(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-40 Austinite CaZn(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-50 Conichalcite CaCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-60 Tangeite CaCu(VO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-70 Gabrielsonite PbFe(AsO4)(OH) P 2₁m mm2

VII/B.26-80 Duftite-alpha PbCu(AsO4)(OH) P 2₁2₁2₁ 2 2 2

VII/B.26-80* Duftite-beta PbCu(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 -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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Tangeite

CaCu(VO4)(OH)
Dana No: 41.5.1.6 Strunz No: VII/B.26-60
Locality:

Notes: