Buttgenbachite Mineral Data

Buttgenbachite Mineral Data +

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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.

Synonym:

ICSD 9210

PDF 8-136

Buttgenbachite Image

Images:

Buttgenbachite

Comments: A blue crystal of buttgenbachite.
Location: Likasi Mine, Likasi, Shaba (Katanga), Congo (Za?re). 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 DipyramidalH-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),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
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Help on Above

Hibbs D E , Leverett P , Williams P A , Neues Jahrbuch fur Mineralogie, Monatshefte , 2002 (2002) p.225-240, Buttgenbachite from Bisbee, Arizona, USA: A single-crystal X-ray study, Locality: Bisbee, Arizona, USA

View Additional jPOWD Structure files for Buttgenbachite
[1]

Physical Properties of Buttgenbachite

Color:

Azure, Blue.

Density:

3.42

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Buttgenbachite

Electron Density:

r_electron=3.32 gm/cc
note: r_{Buttgenbachite}=3.45 gm/cc.

Fermion Index

Fermion Index = 0.01374
Boson Index = 0.98626

Photoelectric:

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

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Buttgenbachite is Not Radioactive

Buttgenbachite Classification

Dana Class:

19.1.2.1 (19)Nitrates - Hydroxyl or Halogen

(19.1)with miscellaneous formulae

(19.1.2)Dana Group

19.1.2.1 Buttgenbachite Cu19Cl4(NO3)2(OH)32·2(H2O) P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

III/D.03-30 III - Halogenides

III/D - Oxi-halogenides with Mg - Mn - Cu - Zn - Sn

III/D.03 - Atacamite series, Claringbullite - Connellite

III/D.03-10 Claringbullite Cu4(OH)7Cl P 6₃/mmc 6/m 2/m 2/m

III/D.03-20 Simonkolleite Zn5(OH)8Cl2·(H2O) R 3m 3 2/m

III/D.03-25 Gordaite! NaZn(SO4)(OH)6Cl·6(H2O) P 3 3

III/D.03-30 Buttgenbachite Cu19Cl4(NO3)2(OH)32·2(H2O) P 6₃/mmc 6/m 2/m 2/m

III/D.03-40 Connellite Cu19Cl4(SO4)(OH)32·3(H2O) P 62c 6 m2

III/D.03-50 Khaidarkanite! Na0.34Cu4Al3(OH)14F3·2(H2O) C 2/m 2/m

Other Buttgenbachite Information

References:

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

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

Buttgenbachite

Cu19Cl4(NO3)2(OH)32·2(H2O)
Dana No: 19.1.2.1 Strunz No: III/D.03-30
Locality:

Notes: