Paracostibite Mineral Data

Paracostibite Mineral Data +

General Paracostibite Information

Chemical Formula:

CoSbS

Composition:

Molecular Weight = 212.75 gm

Cobalt 27.70 % Co

Antimony 57.23 % Sb

Sulfur 15.07 % S

______

100.00 %

Empirical Formula:

CoSbS

Environment:

Massive base-metal sulfide deposit in a carbonatized chlorite-anthophyllite schist that is most likely an altered mafic rock.

IMA Status:

Approved IMA 1970

Locality:

Drill core from Trout Bay, Red Lake, Mulcahy Township, Kenora district, Ontario, Canada Link to MinDat.org Location Data.

Name Origin:

Named for the chemical composition and probable structural relationship to pararammelsbergite.

Synonym:

ICSD 40045

IMA1969-023

PDF 23-106

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Paracostibite Crystallography

Axial Ratios:

a:b:c =0.9684:1:1.9548

Cell Dimensions:

a = 5.764, b = 5.952, c = 11.635, Z = 8; V = 399.17 Den(Calc)= 7.08

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: P bca

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

By Intensity(I/I_o): 2.555(1), 2.035(0.8), 5.813(0.8),

Crystal Structure:

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Rowland J F , Gabe E J , Hall S R , The Canadian Mineralogist , 13 (1975) p.188-196, The crystal structures of costibite (CoSbS) and paracostibite(CoSbS)

Physical Properties of Paracostibite

Color:

Gray white, White.

Density:

6.9

Diaphaniety:

Opaque

Habit:

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

Hardness:

7 - Quartz

Luster:

Metallic

Optical Properties of Paracostibite

RL Anisotrophism:

Weak, faint pink to pale buff.

RL Color:

White with a faint grayish tinge.

RL Pleochroism:

Weak.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Paracostibite in Air**
λ	R₁	R₂	∑ R₁(λ)	∑ R₂(λ)
400 nm	47.80	47.90
420 nm	48.00	48.50
440 nm	48.20	48.90
460 nm	48.20	48.90
480 nm	48.20	49.20
500 nm	48.40	49.60
520 nm	48.70	49.60
540 nm	48.90	49.40
560 nm	49.00	49.30
580 nm	49.20	49.20
600 nm	49.50	49.30
620 nm	49.70	49.60
640 nm	49.90	49.90
660 nm	50.20	50.30
680 nm	50.30	50.60
700 nm	50.50	50.90

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

Calculated Properties of Paracostibite

Electron Density:

r_electron=6.26 gm/cc
note: r_{Paracostibite}=7.08 gm/cc.

Fermion Index

Fermion Index = 0.00113
Boson Index = 0.99887

Photoelectric:

PE_{Paracostibite}= 201.52 barns/electron
U=PE_{Paracostibite} x r_electron=1,260.77 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Paracostibite is Not Radioactive

Paracostibite Classification

Dana Class:

2.12.7.2 (2)Sulfides - Including Selenides and Tellurides

(2.12)where Am Bn Xp, with (m+n):p=1:2

(2.12.7)Costibite Group (Orthorhombic Cobalt Arsenides or Antimonides)

2.12.7.1 Costibite CoSbS P mn2₁ mm2

2.12.7.2 Paracostibite CoSbS P bca 2/m 2/m 2/m

2.12.7.3 Oenite! CoSbAs Unk Ortho

Strunz Class:

II/D.24-30 II - Sulfides and sulphosalts

II/D - Sulfides with metal: sulfur, selenium and tellurium < 1:1, Tellurides with Copper, Silver, Gold

II/D.24 - Clinosafflorite - Paracostibite series

II/D.24-10 Clinosafflorite (Co,Fe,Ni)As2 P 2₁/n 2/m

II/D.24-20 Pararammelsbergite NiAs2 Pbma 2/m 2/m 2/m

II/D.24-30 Paracostibite CoSbS P bca 2/m 2/m 2/m

Other Paracostibite Information

References:

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

See Also:

Links to other databases for Paracostibite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Paracostibite

CoSbS
Dana No: 2.12.7.2 Strunz No: II/D.24-30
Locality:

Notes: