Heyrovskyite Mineral Data

Heyrovskyite Mineral Data +

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General Heyrovskyite Information

Chemical Formula:

Pb10AgBi5S18

Composition:

Molecular Weight = 3,801.96 gm

Silver 2.84 % Ag

Bismuth 27.48 % Bi

Lead 54.50 % Pb

Sulfur 15.18 % S

______

100.00 %

Empirical Formula:

Pb₁₀AgBi₅S₁₈

Environment:

In high temperature quartz veins and fumaroles.

IMA Status:

Approved IMA 1971

Locality:

Hurky, Stredocesky kraj, Cechy (Bohemia), Czech Republic. Link to MinDat.org Location Data.

Name Origin:

Named after the Czech chemist, J. Heyrovsky (1890-1967).

Synonym:

ICSD 69962

PDF 46-1370

Heyrovskyite Image

Images:

Heyrovskyite

Comments: Metallic, gray heyrovskyite in quartz.
Location: H?rky u Cist?, Velk? Chmelistn? (Gro?meleschen), Rakovnik, Stredocesk? Kraj, Bohemia, Czech Republic. Scale: Picture size 4 mm.
© Thomas Witzke / Abraxas-Verlag

Heyrovskyite Crystallography

Axial Ratios:

a:b:c =0.3022:1:2.2415

Cell Dimensions:

a = 4.11, b = 13.6, c = 30.485, Z = 2; V = 1,703.99 Den(Calc)= 7.41

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: C mcm

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

By Intensity(I/I_o): 3.41(1), 2.09(0.4), 2.85(0.3),2.94(0.3), 3.35(0.3), 3.54(0.3), 2.18(0.2), 3.75(0.2),

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

Makovicky E , Mumme W G , Hoskins B F , The Canadian Mineralogist , 29 (1991) p.553-559, The crystal structure of Ag-Bi-bearing heyrovskyite

Physical Properties of Heyrovskyite

Cleavage:

None

Color:

Tin white.

Density:

7.11 - 7.18, Average = 7.14

Diaphaniety:

Opaque

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Acicular - Occurs as needle-like crystals.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Hardness:

3.5-4 - Copper Penny-Fluorite

Luster:

Metallic

Streak:

grayish black

Optical Properties of Heyrovskyite

RL Anisotrophism:

Moderate, gray to red brown.

RL Color:

Creamy white.

RL Pleochroism:

Not apparent.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Heyrovskyite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	50.60	46.30
420 nm	49.90	45.60
440 nm	49.70	44.90
460 nm	49.40	44.40
480 nm	49.20	43.90
500 nm	48.30	42.90
520 nm	47.60	42.30
540 nm	46.90	41.40
546 nm	46.60	41.30
560 nm	46.40	40.90
580 nm	46.20	40.60
589 nm	46.00	40.70
600 nm	45.90	40.50
620 nm	45.70	40.20
640 nm	45.60	39.90
650 nm	45.60	39.90
660 nm	45.50	39.90
680 nm	45.30	39.70
700 nm	45.20	39.60

**Calculated Relative Intensity Colors of Heyrovskyite in Air**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	220%
R₁
R₂

Calculated Properties of Heyrovskyite

Electron Density:

r_electron=6.12 gm/cc
note: r_Heyrovskyite=7.41 gm/cc.

Fermion Index

Fermion Index = 0.12157
Boson Index = 0.87843

Photoelectric:

PE_Heyrovskyite=1,557.27 barns/electron
U=PE_Heyrovskyite x r_electron=9,530.27 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Heyrovskyite is Not Radioactive

Heyrovskyite Classification

Dana Class:

3.3.3.1 (3)Sulfides - Sulfosalts

(3.3)where 3 < z/y < 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals

(3.3.3)Dana Group

3.3.3.1 Heyrovskyite Pb10AgBi5S18 C mcm 2/m 2/m 2/m

3.3.3.2 Mozgovaite! PbBi4(S,Se)7 Bbmm 2/m 2/m 2/m

Strunz Class:

II/E.29-20 II - Sulfides and sulphosalts

II/E - Sulfosalts (S : As,Sb,Bi = x) Lead-Sulfosalts (Pb-Cu/Ag) with predominant Vismut x = 6.0 - 1.6

II/E.29 - Aschamalmite - Heyrowskyite series

II/E.29-10 Aschamalmite Pb6Bi2S9 C 2/m 2/m

II/E.29-20 Heyrovskyite Pb10AgBi5S18 C mcm 2/m 2/m 2/m

Other Heyrovskyite Information

References:

NAME( Duda&Rejl90) PHYS. PROP.(Dana8) OPTIC PROP.(CanMin, v 41, p 431)

See Also:

Links to other databases for Heyrovskyite :
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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Heyrovskyite

Pb10AgBi5S18
Dana No: 3.3.3.1 Strunz No: II/E.29-20
Locality:

Notes: