Trippkeite Mineral Data

Trippkeite Mineral Data +

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General Trippkeite Information

Chemical Formula:

CuAs+++2O4

Composition:

Molecular Weight = 277.39 gm

Copper 22.91 % Cu 28.68 % CuO

Arsenic 54.02 % As 71.32 % As₂O₃

Oxygen 23.07 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

CuAs₂O₄

IMA Status:

Valid Species (Pre-IMA) 1880

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 4287

PDF 31-451

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Trippkeite Crystallography

Axial Ratios:

a:c = 1:0.64862

Cell Dimensions:

a = 8.592, c = 5.573, Z = 4; V = 411.41 Den(Calc)= 4.48

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: P 4₁/mbc

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

By Intensity(I/I_o): 3.16(1), 6.07(0.55), 3.04(0.45),

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Crystal Structure:

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Zemann J , Tschermaks Mineralogische und Petrographische Mitteilungen , 2 (1951) p.417-423, Formel und kristallstruktur des trippkeits, Note: coordinates of Cu and As corrected per Pertlik, 1975, Locality: Copiapo, Chile

View Additional jPOWD Structure files for Trippkeite
[1]

Physical Properties of Trippkeite

Cleavage:

[100] Perfect, [110] Good

Color:

Greenish blue.

Density:

4.8

Diaphaniety:

Subopaque

Hardness:

4 - Fluorite

Luster:

Adamantine

Optical Properties of Trippkeite

Gladstone-Dale:

CI meas= 0.027 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.042 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2254,KPDmeas= 0.2104,KC= 0.2164

Optical Data:

Uniaxial (+), w=1.9, e=2.12, bire=0.2200.

Calculated Properties of Trippkeite

Electron Density:

r_electron=4.40 gm/cc
note: r_Trippkeite=4.80 gm/cc.

Fermion Index

Fermion Index = 0.00011
Boson Index = 0.99989

Photoelectric:

PE_Trippkeite= 48.66 barns/electron
U=PE_Trippkeite x r_electron= 213.87 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Trippkeite is Not Radioactive

Trippkeite Classification

Dana Class:

45.1.5.1 (45)Acid and normal Antimonites, Arsenites and Phosphites

(45.1)with miscellaneous formulae

(45.1.5)Dana Group

45.1.5.1 Trippkeite CuAs2O4 P 4₁/mbc 4/m 2/m 2/m

Strunz Class:

IV/B.06-10 IV - Oxides

IV/B - Oxides with metal : oxygen = 3:4 (spinel type M3O4 and related)

IV/B.06 - Trippkeite - Minium series

IV/B.06-10 Trippkeite CuAs2O4 P 4₁/mbc 4/m 2/m 2/m

IV/B.06-15 Kusachiite CuBi2O4 P 4/ncc 4/m 2/m 2/m

IV/B.06-20 Schafarzikite FeSb2O4 P 4₁/mbc 4/m 2/m 2/m

IV/B.06-30 Versiliaite Fe4Fe8Sb12O23S2 Pbam ? 2/m 2/m 2/m

IV/B.06-40 Apuanite FeFe4Sb4O12S P 4₁/mbc 4/m 2/m 2/m

IV/B.06-50 Minium Pb2PbO4 P 4₁/mbc 4/m 2/m 2/m

Other Trippkeite 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 Trippkeite :
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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Trippkeite

CuAs+++2O4
Dana No: 45.1.5.1 Strunz No: IV/B.06-10
Locality:

Notes: