Buttgenbachite Mineral Data

General Buttgenbachite Information

Chemical Formula:

Cu19Cl4(NO3)2(OH)32•2(H2O)

Composition:

Molecular Weight = 2,053.46 gm

Copper 58.80 % Cu 73.60 % CuO

Hydrogen 1.77 % H 15.79 % H₂O

Nitrogen 1.36 % N 5.26 % N₂O₅

Chlorine 6.91 % Cl 6.91 % Cl

- % Cl -1.56 % -O=Cl₂

Oxygen 31.17 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Cu₁₉Cl₄(NO₃)₂(OH)₃₂•2(H₂O)

Environment:

In a cavity in cuprite.

IMA Status:

Valid Species (Pre-IMA) 1925

Locality:

Likasi, Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for Henri J. Buttgenback (1874-1964), Belgian mineralogist.

Name Pronunciation:

Buttgenbachite + Pronunciation

Synonym:

ICSD 9210

PDF 8-136

Buttgenbachite Image

Images:

Buttgenbachite

Comments: A blue crystal of buttgenbachite.
Location: Likasi Mine, Likasi, Shaba (Katanga), Congo (Zaïre). Scale: Crystal length 3.1 mm.
© Thomas Witzke / Abraxas-Verlag

Buttgenbachite Crystallography

Axial Ratios:

a:c = 1:0.57711

Cell Dimensions:

a = 15.82, c = 9.13, Z = 2; V = 1,978.86 Den(Calc)= 3.45

Crystal System:

Hexagonal - Dihexagonal Dipyramidal H-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 7.95(1), 2.3(0.95), 13.7(0.95),

Physical Properties of Buttgenbachite

Color:

Azure, Blue.

Density:

3.42

Diaphaneity:

Translucent

Habit:

Acicular - Occurs as needle-like crystals.

Hardness:

3 - Calcite

Luster:

Vitreous (Glassy)

Streak:

light blue

Optical Properties of Buttgenbachite

Dichroism (e):

blue.

Dichroism (w):

blue.

Gladstone-Dale:

CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.012 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2159,KPDmeas= 0.2178,KC= 0.2134
Ncalc = 1.73 - 1.74

Optical Data:

Uniaxial (+), w=1.738, e=1.752, bire=0.0140.

Calculated Properties of Buttgenbachite

Electron Density:

Bulk Density (Electron Density)=3.32 gm/cc
note: Specific Gravity of Buttgenbachite =3.45 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Buttgenbachite}= 26.23 barns/electron
U=PE_{Buttgenbachite} x rElectron Density= 87.16 barns/cc.

Radioactivity:

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

Buttgenbachite Classification

Dana Class:

19.01.02.01 (19)Nitrates - Hydroxyl or Halogen

(19.01)with miscellaneous formulae

(19.01.02)Dana Group

19.01.02.01 Buttgenbachite Cu19Cl4(NO3)2(OH)32•2(H2O) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

03.DA.25 03 - HALIDES

03.D - Oxyhalides, Hydroxyhalides and Related Double Halides

03.DA -With Cu, etc., without Pb

03.DA.25 Buttgenbachite Cu19Cl4(NO3)2(OH)32•2(H2O) P 6₃/mmc 6/m 2/m 2/m

03.DA.25 Connellite Cu19Cl4(SO4)(OH)32•3(H2O) P 62c 6 m2

Other Buttgenbachite Information

References:

NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Buttgenbachite :
1 - Am. Min. Crystal Structure Database
2 - Amethyst Galleries' Mineral Gallery
3 - Athena
4 - EUROmin Project
5 - Ecole des Mines de Paris
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info
16 - WWW-MINCRYST

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

Buttgenbachite

Cu19Cl4(NO3)2(OH)32•2(H2O)
Dana No: 19.01.02.01 Strunz No: 03.DA.25
Locality:

Notes:

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