Jolliffeite Mineral Data

Jolliffeite Mineral Data +

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General Jolliffeite Information

Chemical Formula:

(Ni,Co)AsSe

Composition:

Molecular Weight = 212.63 gm

Cobalt 6.93 % Co

Nickel 20.70 % Ni

Arsenic 35.24 % As

Selenium 37.13 % Se

______

100.00 %

Empirical Formula:

Ni_0.75Co_0.25AsSe

Environment:

Se analogue of gersdorffite.

IMA Status:

Approved IMA 1991

Locality:

Shirley Penin., Lake Athabasca, SK, Canada. Link to MinDat.org Location Data.

Name Origin:

Named in 1991 for Alfred W. Jolliffe (1907-1988), Canadian geologist.

Synonym:

ICSD 40656

IMA1989-011

PDF 45-1383

Jolliffeite Image

Images:

Jolliffeite Eskebornite

Comments: Back-scattered electron image of jolliffeite in sulfurian eskebornite. Note the cracked appearance and the different brightness of eskebornite, which is a reflection of variable ratio of selenium to sulfur. (CanMin v 42, p 844).
Location: Niederschlema-Alberoda uranium deposit, in the Erzgebirge region of Germany. Scale: See Image.
© Canadian Mineralogist

Jolliffeite Crystallography

Cell Dimensions:

a = 5.831, Z = 4; V = 198.26 Den(Calc)= 7.12

Crystal System:

Isometric - DiploidalH-M Symbol (2/m 3) Space Group: P a3

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

By Intensity(I/I_o): 2.602(1), 1.757(0.8), 2.378(0.8),

Physical Properties of Jolliffeite

Color:

Tin white.

Density:

7.1

Diaphaniety:

Opaque

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Metallic

Calculated Properties of Jolliffeite

Electron Density:

r_electron=6.35 gm/cc
note: r_Jolliffeite=7.12 gm/cc.

Fermion Index

Fermion Index = 0.03056
Boson Index = 0.96944

Photoelectric:

PE_Jolliffeite= 66.27 barns/electron
U=PE_Jolliffeite x r_electron= 420.48 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Jolliffeite is Not Radioactive

Jolliffeite Classification

Dana Class:

2.12.3.9 (2)Sulfides - Including Selenides and Tellurides

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

(2.12.3)Cobaltite Group (Cubic or pseudocubic crystals)

2.12.3.1 Cobaltite CoAsS P ca2₁ mm2

2.12.3.2 Gersdorffite NiAsS P 2₁3 2 3

2.12.3.3 Ullmannite NiSbS P 2₁3 2 3

2.12.3.4 Willyamite (Co,Ni)SbS P 2₁3 2 3

2.12.3.5 Tolovkite IrSbS P 2₁3 2 3

2.12.3.6 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3

2.12.3.7 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3

2.12.3.8 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3

2.12.3.9 Jolliffeite (Ni,Co)AsSe P a3 2/m 3

2.12.3.10 Padmaite PdBiSe P 2₁3 2 3

2.12.3.11 Michenerite (Pd,Pt)BiTe P 2₁3 2 3

2.12.3.12 Maslovite PtBiTe P 2₁3 2 3

2.12.3.13 Testibiopalladite PdTe(Sb,Te) P 2₁3 2 3

2.12.3.14 Changchengite! IrBiS P 2₁3 2 3

2.12.3.15 Milotaite! PdSbSe P 2₁/3 2 3

2.12.3.16 IMA2004-047! PdAsSe Pa3 4/m 2/m 2/m

Strunz Class:

II/D.18-25 II - Sulfides and sulphosalts

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

II/D.18 - Cobaltite group, Cobaltite - Ullmannite - Tolovkite series

II/D.18-10 Cobaltite CoAsS P ca2₁ mm2

II/D.18-20 Gersdorffite NiAsS P 2₁3 2 3

II/D.18-25 Jolliffeite (Ni,Co)AsSe P a3 2/m 3

II/D.18-30 Willyamite (Co,Ni)SbS P 2₁3 2 3

II/D.18-40 Ullmannite NiSbS P 2₁3 2 3

II/D.18-50 Hollingworthite (Rh,Pt,Pd)AsS P a3 2/m 3

II/D.18-60 Irarsite (Ir,Ru,Rh,Pt)AsS P a3 2/m 3

II/D.18-70 Platarsite (Pt,Rh,Ru)AsS P a3 2/m 3

II/D.18-80 Tolovkite IrSbS P 2₁3 2 3

Other Jolliffeite Information

References:

NAME( Dana8) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996)

See Also:

Links to other databases for Jolliffeite :
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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Jolliffeite

(Ni,Co)AsSe
Dana No: 2.12.3.9 Strunz No: II/D.18-25
Locality:

Notes: