Jonassonite Mineral Data

General Jonassonite Information

Chemical Formula:

Au(Bi,Pb)5S4

Composition:

Molecular Weight = 1,344.86 gm

Cadmium 0.08 % Cd

Silver 0.08 % Ag

Bismuth 68.68 % Bi

Antimony 0.09 % Sb

Lead 6.01 % Pb

Gold 14.94 % Au

Selenium 0.41 % Se

Sulfur 9.70 % S

______

100.00 %

Empirical Formula:

Au_1.02Ag_0.01Bi_4.42Pb_0.39Cd_0.01Sb_0.01S_4.07Se_0.07

Environment:

Detected in old mining dumps of the abandoned Nagyb�rzs�ny deposit.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Nagyb�rzs�ny ore deposit, B�rzs�ny Mountains, Hungary Link to MinDat.org Location Data.

Name Origin:

Named for Ian Roy Jonasson, an economic geologist at the Geological Survey of Canada, Ottawa,

Synonym:

IMA2004-031

Jonassonite Image

Images:

Jonassonite

Comments: PPL (a) and XPL (b) of jonassonite (Jo) with inclusions of native bismuth (Bi) is intergrown with native bismuth (Bi) and bismuthinite (Bmt). (b) demonstrates the characteristic orange-red color of jonassonite. (CanMin, v44:1127).
Location: Nagybörzsöny ore deposit, Börzsöny Mountains, Hungary. Scale: Scale bar 100 µm.
© Canadian Mineralogist

Jonassonite Crystallography

Axial Ratios:

a:b:c =4.4617:1:3.4016

Cell Dimensions:

a = 18.329, b = 4.108, c = 13.974, Z = 4; beta = 100.9° V = 1,033.20 Den(Calc)= 8.65

Crystal System:

Monoclinic Space Group: F2/m, F2 or Fm

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

By Intensity(I/I_o): 2.959(1), 2.086(0.5), 2.101(0.5),3.382(0.4), 9.002(0.4), 3.46(0.3), 6.876(0.3), 6.046(0.2),

Physical Properties of Jonassonite

Cleavage:

None

Color:

Tin white.

Diaphaneity:

Opaque

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Metallic

Streak:

black

Optical Properties of Jonassonite

RL Anisotrophism:

Distinct in shades of green and purple.

RL Bireflectance:

Weak.

RL Color:

Pale gray.

RL Pleochroism:

Weak pale slightly bluish gray to pale gray.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Jonassonite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	48.80	49.50
420 nm	49.10	50.10
440 nm	49.10	50.20
460 nm	48.80	50.10
480 nm	48.40	50.00
500 nm	47.60	49.70
520 nm	47.10	49.40
540 nm	46.70	49.20
560 nm	46.50	49.00
580 nm	46.50	49.90
600 nm	46.70	48.80
620 nm	47.20	48.80
640 nm	47.70	48.40
660 nm	48.20	48.90
680 nm	45.40	49.00
700 nm	45.60	49.00

**Standardized Intensity (100%) Reflection Spectra of Jonassonite in Oil**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	35.80	36.60
420 nm	35.80	36.80
440 nm	35.80	36.80
460 nm	35.30	36.80
480 nm	34.70	36.60
500 nm	33.70	36.30
520 nm	33.10	35.90
540 nm	32.70	35.70
560 nm	32.60	35.50
580 nm	32.70	35.30
600 nm	33.10	35.10
620 nm	33.50	35.00
640 nm	34.00	35.00
660 nm	34.40	35.00
680 nm	34.60	35.10
700 nm	34.80	35.10

**Calculated Relative Intensity Colors of Jonassonite in Air**
Relative Intensity	0%	20%	40%	60%	80%	100%	120%	140%	160%	180%	190%
R₁
R₂

**Calculated Relative Intensity Colors of Jonassonite in Oil**
Relative Intensity	0%	30%	60%	90%	100%	120%	150%	180%	210%	240%	270%
R₁
R₂

Calculated Properties of Jonassonite

Electron Density:

Bulk Density (Electron Density)=7.05 gm/cc
note: Specific Gravity of Jonassonite =8.65 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Jonassonite=1,719.41 barns/electron
U=PE_Jonassonite x rElectron Density=12129.08 barns/cc.

Radioactivity:

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

Jonassonite Classification

Dana Class:

02.05.11.01 (02)Sulfides - Including Selenides and Tellurides

(02.05)where Am Bn Xp, with (m+n):p=3:2

(02.05.11)Dana Group

02.05.11.01 Jonassonite! Au(Bi,Pb)5S4 F2/m, F2 or Fm Mono

Strunz Class:

02.LA.65 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.L - Unclassified Sulfosalts

02.LA -Without essential Pb

02.LA.65 Jonassonite! Au(Bi,Pb)5S4 F2/m, F2 or Fm Mono

Other Jonassonite Information

References:

NAME( CanMin, v44:1127) PHYS. PROP.(CanMin, v44:1127) OPTIC PROP.(CanMin, v44:1127)

See Also:

Links to other databases for Jonassonite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Jonassonite

Au(Bi,Pb)5S4
Dana No: 02.05.11.01 Strunz No: 02.LA.65
Locality:

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