Trippkeite Mineral Data

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

Environment:

In a copper deposit.

IMA Status:

Valid Species (Pre-IMA) 1880

Locality:

Copiapo, Atacama, Chile. Link to MinDat.org Location Data.

Name Origin:

Paul Trippke (1851-1880), Polish mineralogist, who discovered the mineral.

Name Pronunciation:

Trippkeite + Pronunciation

Synonym:

ICSD 4287

PDF 31-451

Trippkeite Image

Images:

Trippkeite

Comments: Tiny bluegreen crystals of trippkeite, maximum size about 1 mm in volcanic rock. Type specimen for trippkeite.
Location: Copiapo, Atacama, Chile. Scale: Specimen Size 14x6 mm.
© German Type Specimen Catalogue

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),

Forms:

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Forms: ( 1 2 1) ( 0 1 1) ( 0 2 1) ( 1 1 0) ( 1 0 0) ( 0 0 1)

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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

Diaphaneity:

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
Ncalc = 1.97 - 2.04

Optical Data:

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

Calculated Properties of Trippkeite

Electron Density:

Bulk Density (Electron Density)=4.40 gm/cc
note: Specific Gravity of Trippkeite =4.80 gm/cc.

Fermion Index:

Fermion Index = 0.0001107437
Boson Index = 0.9998892563

Photoelectric:

PE_Trippkeite= 48.66 barns/electron
U=PE_Trippkeite x rElectron Density= 213.87 barns/cc.

Radioactivity:

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

Trippkeite Classification

Dana Class:

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

(45.01)with miscellaneous formulae

(45.01.05)Dana Group

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

Strunz Class:

04.JA.20 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.J - Arsenites, Antimonites, Bismuthites, Sulfites,

04.JA -Arsenites, antimonites, bismuthites; without additional anions, without H2O

04.JA.20 Kusachiite CuBi2O4 P 4/ncc 4/m 2/m 2/m

04.JA.20 Schafarzikite FeSb2O4 P 4₁/mbc 4/m 2/m 2/m

04.JA.20 Trippkeite CuAs2O4 P 4₁/mbc 4/m 2/m 2/m

Other Trippkeite Information

References:

NAME( AntBidBlaNic4) 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 - 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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Ask about Trippkeite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Trippkeite Specimen Label here :

Trippkeite

CuAs+++2O4
Dana No: 45.01.05.01 Strunz No: 04.JA.20
Locality:

Notes: