Hodrushite Mineral Data

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General Hodrushite Information

Chemical Formula:

Cu8Bi12S22

Composition:

Molecular Weight = 3,721.58 gm

Copper 13.66 % Cu

Bismuth 67.38 % Bi

Sulfur 18.96 % S

______

100.00 %

Empirical Formula:

Cu₈Bi₁₂S₂₂

Environment:

In polymetallic ore deposits of subvolcanic type, in a quartz vein system developed in propylitized pryoxenite andesite.

IMA Status:

Approved IMA 1970

Locality:

Hodursa, Czechoslovakia. Link to MinDat.org Location Data.

Name Origin:

Named after its locality.

Name Pronunciation:

Hodrushite + Pronunciation

Synonym:

ICSD 24462

PDF 25-267

Hodrushite Image

Images:

Hodrushite Cupromakovickyite

Comments: Kup?cíkite (ku) and hodrushite (ho) partly replaced by bismuthinite derivative (bd56) with relict lamellae of low-Cu (4P) and cupromakovickyite [4P(Cu,Pb)]. (CanMin, 41:1165).
Location: Scheelite deposit of Felbertal, Austria. Scale: Scale Bar 100 µm.
© Canadian Mineralogist

Hodrushite Crystallography

Axial Ratios:

a:b:c =6.9236:1:4.4732

Cell Dimensions:

a = 27.21, b = 3.93, c = 17.58, Z = 2; beta = 92.15° V = 1,878.60 Den(Calc)= 6.58

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: A2/m

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

By Intensity(I/I_o): 3.102(1), 2.715(0.8), 3.62(0.8),

Crystal Structure:

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

Topa D , Makovicky E , Balic-Zunic T , The Canadian Mineralogist , 41 (2003) p.1481-1501, Crystal structures and crystal chemistry of members of the cuprobismutite, homologous series of sulfosalts, Locality: Felbertal Austria

View Additional jPOWD Structure files for Hodrushite
[1]

Physical Properties of Hodrushite

Cleavage:

None

Color:

Brown, Brownish bronze, Steel gray.

Density:

6.45

Diaphaneity:

Opaque

Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Hardness:

4-5 - Fluorite-Apatite

Luster:

Metallic

Streak:

grayish black

Optical Properties of Hodrushite

RL Anisotrophism:

Very feeble, in grays.

RL Color:

Creamy with very slight pinkish tint.

RL Pleochroism:

Very weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Hodrushite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	36.20	39.80
420 nm	36.20	40.40
440 nm	36.20	41.00
460 nm	36.30	41.60
480 nm	36.40	42.00
500 nm	36.60	42.40
520 nm	36.90	42.60
540 nm	37.40	42.80
560 nm	37.60	43.00
580 nm	37.80	43.20
600 nm	37.90	43.30
620 nm	38.00	43.50
640 nm	38.00	43.70
660 nm	38.00	43.70
680 nm	37.90	43.60
700 nm	37.80	43.40

**Calculated Relative Intensity Colors of Hodrushite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	250%
R₁
R₂

Calculated Properties of Hodrushite

Electron Density:

Bulk Density (Electron Density)=5.59 gm/cc
note: Specific Gravity of Hodrushite =6.58 gm/cc.

Fermion Index:

Fermion Index = 0.0014223504
Boson Index = 0.9985776496

Photoelectric:

PE_Hodrushite=1,285.05 barns/electron
U=PE_Hodrushite x rElectron Density=7,179.69 barns/cc.

Radioactivity:

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

Hodrushite Classification

Dana Class:

03.08.04.01 (03)Sulfides - Sulfosalts

(03.08)where 1 < z/y <2 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(03.08.04)Dana Group

03.08.04.01 Hodrushite Cu8Bi12S22 A2/m 2/m

03.08.04.02 Paderaite Cu7((Cu,Ag)0.33Pb1.33Bi11.33)13S22 P 2₁/m 2/m

Strunz Class:

02.JA.10c 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.J - Sulfosalts of PbS Archetype

02.JA -Galena derivatives with little or no Pb

02.JA.10c Hodrushite Cu8Bi12S22 A2/m 2/m

Other Hodrushite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic1)

See Also:

Links to other databases for Hodrushite :
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

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Ask about Hodrushite here :
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Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Hodrushite

Cu8Bi12S22
Dana No: 03.08.04.01 Strunz No: 02.JA.10c
Locality:

Notes: