Julienite Mineral Data

General Julienite Information

Chemical Formula:

Na2Co++(SCN)4•8(H2O)

Composition:

Molecular Weight = 481.37 gm

Sodium 9.55 % Na

Cobalt 12.24 % Co

Hydrogen 3.35 % H

Carbon 9.98 % C

Sulfur 26.65 % S

Nitrogen 11.64 % N

Oxygen 26.59 % O

______

100.00 %

Empirical Formula:

Na₂Co(SCN)₄•8(H₂O)

Environment:

Cobaltian wad in a white talc schist.

IMA Status:

Not Approved (Pre-IMA) 1928

Locality:

Chamitumba, near Kambove, Shaba, Zaire. Link to MinDat.org Location Data.

Name Origin:

Named for Henri Julien (-1920), Belgian scientist.

Name Pronunciation:

Julienite + Pronunciation

Synonym:

ICSD 16830

PDF 2-372

Sodium colbalt thiocyanate

Julienite Image

Images:

Julienite

Comments: Bright blue nearly opaque prismatic micro crystal of julienite.
Location: Chamibumba, near Kambove, Katanga, Shaba, Zaire. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Julienite Crystallography

Axial Ratios:

a:c = 1:0.60281

Cell Dimensions:

a = 9.24, c = 5.57, Z = 1; V = 475.55 Den(Calc)= 1.68

Crystal System:

Tetragonal - Dipyramidal H-M Symbol (4/m) Space Group: P 4₁/n

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

By Intensity(I/I_o): 1.375(1), 3.23(1), 3.55(1),

Physical Properties of Julienite

Cleavage:

{001} Good

Color:

Blue.

Density:

1.648

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Optical Properties of Julienite

Optical Data:

Uniaxial (+), w=1.556, e=1.645, bire=0.0890.

Calculated Properties of Julienite

Electron Density:

Bulk Density (Electron Density)=1.71 gm/cc
note: Specific Gravity of Julienite =1.68 gm/cc.

Fermion Index:

Fermion Index = 0.11
Boson Index = 0.89

Photoelectric:

PE_Julienite= 5.62 barns/electron
U=PE_Julienite x rElectron Density= 9.61 barns/cc.

Radioactivity:

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

Julienite Classification

Dana Class:

50.02.03.01 (50)Salts of Organic Acids

(50.02)(Mellitates, Citrates, Cyanates, and Acetates)

(50.02.03)Dana Group

50.02.03.01 Julienite* Na2Co(SCN)4•8(H2O) P 4₁/n 4/m

Strunz Class:

10.AD.05 10 - ORGANIC COMPOUNDS

10.A - Salts of Organic Acids

10.AD -Cyanates

10.AD.05 Julienite* Na2Co(SCN)4•8(H2O) P 4₁/n 4/m

Other Julienite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Julienite :
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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Print or Cut-and-Paste your Julienite Specimen Label here :

Julienite

Na2Co++(SCN)4•8(H2O)
Dana No: 50.02.03.01 Strunz No: 10.AD.05
Locality:

Notes:

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