Paakkonenite Mineral Data

General Paakkonenite Information

Chemical Formula:

Sb2AsS2

Composition:

Molecular Weight = 382.55 gm

Antimony 63.65 % Sb

Arsenic 19.58 % As

Sulfur 16.76 % S

______

100.00 %

Empirical Formula:

Sb₂AsS₂

IMA Status:

Approved IMA 1981

Locality:

Kalliosalo deposit, Seinajoki region, Finland. Link to MinDat.org Location Data.

Name Origin:

Named for Viekko Paakkonen, who studied the ore deposits of the region.

Name Pronunciation:

Paakkonenite + Pronunciation

Paakkonenite Image

Images:

Click Here for Larger Paakkonenite Image

Paakkonenite Kermesite

Comments: Much of the matrix is the gray metallic paakkonenite with red crystals of kermesite and minute yellow crystals of valentinite.
Location: Cai' ao mine, Danfong Co., Shaanxi Prov., China. Scale: 3x2x2cm.
© Tom Loomis / Dakota Matrix

Images:

Paakkonenite Vaughanite Stibarsen

Comments: B&W image of vaughanite (Va) aggregate surrounding a fibrous bundle of paakkonenite (Pfi) and associated with stibarsen (Star) and realgar (Re). Oil immersion. (CanMin, v53:369).
Location: Rare primary constituent of the Golden Giant orebody of the Hemlo gold deposit, Hemlo, Ontario, Canada. Scale: See Image.
© Canadian Mineralogist

Paakkonenite Crystallography

Axial Ratios:

a:b:c =2.7153:1:3.1548

Cell Dimensions:

a = 10.75, b = 3.959, c = 12.49, Z = 4; beta = 115.25° V = 480.78 Den(Calc)= 5.28

Crystal System:

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

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

By Intensity(I/I_o): 2.87(1), 2.68(0.6), 3.13(0.4),

Crystal Structure:

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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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Bonazzi P , Borrini D , Mazzi F , Olmi F , American Mineralogist , 80 (1995) p.1054-1058, Crystal structure and twinning of Sb2AsS2, the synthetic analogue of, paakkonenite

Physical Properties of Paakkonenite

Color:

Gray.

Density:

5.21

Diaphaneity:

Opaque

Habit:

Irregular Grains - Occurs as splotchy, anhedral crystals forming inclusions in other minerals or rocks.

Hardness:

2 - Gypsum

Luster:

Metallic

Streak:

brownish gray

Optical Properties of Paakkonenite

RL Anisotrophism:

Strong.

RL Color:

Light pale gray with bright red internam reflections.

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Paakkonenite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
440 nm	40.90	52.10
460 nm	39.80	51.70
480 nm	38.70	50.80
500 nm	38.00	49.80
520 nm	37.50	48.70
540 nm	37.20	47.80
560 nm	36.90	47.00
580 nm	36.70	46.30
600 nm	36.50	45.80
620 nm	36.50	45.50
640 nm	36.40	45.30
660 nm	36.20	45.10
680 nm	36.20	45.40
700 nm	36.00	45.30

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

Calculated Properties of Paakkonenite

Electron Density:

Bulk Density (Electron Density)=4.61 gm/cc
note: Specific Gravity of Paakkonenite =5.28 gm/cc.

Fermion Index:

Fermion Index = 0.001257314
Boson Index = 0.998742686

Photoelectric:

PE_Paakkonenite= 229.83 barns/electron
U=PE_Paakkonenite x rElectron Density=1,059.48 barns/cc.

Radioactivity:

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

Paakkonenite Classification

Dana Class:

02.11.05.01 (02)Sulfides - Including Selenides and Tellurides

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

(02.11.05)Dana Group

02.11.05.01 Paakkonenite Sb2AsS2 C 2/m 2/m

Strunz Class:

02.DB.05b 02 - SULFIDES and SULFOSALTS (sulfides, selenides, tellurides; arsenides, antimonides, bismuthides; sulfarsenites, sulf

02.D - Metal Sulfides, M:S = 3:4 and 2:3

02.DB -M:S = 2:3 and similar

02.DB.05b Paakkonenite Sb2AsS2 C 2/m 2/m

Other Paakkonenite Information

References:

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

See Also:

Links to other databases for Paakkonenite :
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
15 - WWW-MINCRYST

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Ask about Paakkonenite here :
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Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Paakkonenite

Sb2AsS2
Dana No: 02.11.05.01 Strunz No: 02.DB.05b
Locality:

Notes: