Freboldite Mineral Data

General Freboldite Information

Chemical Formula:

CoSe

Composition:

Molecular Weight = 137.89 gm

Cobalt 42.74 % Co

Selenium 57.26 % Se

______

100.00 %

Empirical Formula:

CoSe

Environment:

In dolomite veinlets.

IMA Status:

Valid Species (Pre-IMA) 1957

Locality:

From the Trogtal quarry, Steinbruch, and at Rote Berg, St. Andreasberg, Harz. Link to MinDat.org Location Data.

Name Origin:

For Professor Georg Frebold of Hannover, Germany.

Name Pronunciation:

Freboldite + Pronunciation

Synonym:

ICSD 42541

PDF 15-464

Freboldite Image

Images:

Freboldite

Comments: Copper-red, tarnished, freboldite, as granular material intermixed with darker colored sandstone matrix.
Location: Temple Mountain, San Rafael District (San Rafael Swell), Emery Co., Utah, USA. Scale: Specimen Size 2 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Freboldite Crystallography

Axial Ratios:

a:c = 1:1.4626

Cell Dimensions:

a = 3.61, c = 5.28, Z = 2; V = 59.59 Den(Calc)= 7.68

Crystal System:

Hexagonal - Dihexagonal DipyramidalH-M Symbol (6/m 2/m 2/m) Space Group: P 6₃/mmc

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

By Intensity(I/I_o): 1.066(1), 2.05(1), 9.63(1),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Wyckoff R W G , Crystal Structures , 1 (1963) p.85-237, Second edition. Interscience Publishers, New York, New York, Note: ideal nickel arsenide structure

Physical Properties of Freboldite

Cleavage:

None

Color:

Copper red, Pink.

Diaphaneity:

Opaque

Hardness:

2.5-3 - Finger Nail-Calcite

Luster:

Metallic

Optical Properties of Freboldite

RL Anisotrophism:

Less than nickeline.

RL Color:

Similar to nickeline, but more intense violet in oil.

Calculated Properties of Freboldite

Electron Density:

Bulk Density (Electron Density)=6.79 gm/cc
note: Specific Gravity of Freboldite =7.68 gm/cc.

Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Photoelectric:

PE_Freboldite= 61.17 barns/electron
U=PE_Freboldite x rElectron Density= 415.66 barns/cc.

Radioactivity:

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

Freboldite Classification

Dana Class:

02.08.11.10 (02)Sulfides - Including Selenides and Tellurides

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

(02.08.11)Nickeline Group (Hexagonal: P63/mmc)

02.08.11.01 Nickeline NiAs P 6₃/mmc 6/m 2/m 2/m

02.08.11.02 Breithauptite NiSb P 6₃/mmc 6/m 2/m 2/m

02.08.11.03 Sederholmite NiSe P 6₃/mmc 6/m 2/m 2/m

02.08.11.04 Hexatestibiopanickelite (Ni,Pd)(Te,Sb) P 6₃/mmc 6/m 2/m 2/m

02.08.11.05 Sudburyite (Pd,Ni)Sb P 6₃/mmc 6/m 2/m 2/m

02.08.11.06 Kotulskite Pd(Te,Bi) P 6₃/mmc 6/m 2/m 2/m

02.08.11.07 Sobolevskite PdBi P 6₃/mmc 6/m 2/m 2/m

02.08.11.08 Stumpflite Pt(Sb,Bi) P 6₃/mmc 6/m 2/m 2/m

02.08.11.09 Langisite (Co,Ni)As P 6₃/mmc 6/m 2/m 2/m

02.08.11.10 Freboldite CoSe P 6₃/mmc 6/m 2/m 2/m

02.08.11.11 Achavalite! FeSe P 6₃/mmc 6/m 2/m 2/m

02.08.11.12 Sorosite! Cu(Sn,Sb) P 6₃/mmc 6/m 2/m 2/m

02.08.11.13 Vavrinite! Ni2SbTe2 P 6₃/mmc 6/m 2/m 2/m

Strunz Class:

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

02.C - Metal Sulfides, M:S = 1:1 (and similar)

02.CC -With Ni, Fe, Co, PGE, etc.

02.CC.05 Achavalite FeSe P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Breithauptite NiSb P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Freboldite CoSe P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Hexatestibiopanickelite (Ni,Pd)(Te,Sb) P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Langisite (Co,Ni)As P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Jaipurite* CoS P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Kotulskite Pd(Te,Bi) P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Nickeline NiAs P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Zlatogorite! CuNiSb2 P 3m1 3 2/m

02.CC.05 Sederholmite NiSe P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Stumpflite Pt(Sb,Bi) P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Sudburyite (Pd,Ni)Sb P 6₃/mmc 6/m 2/m 2/m

02.CC.05 Sobolevskite PdBi P 6₃/mmc 6/m 2/m 2/m

Other Freboldite Information

References:

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

See Also:

Links to other databases for Freboldite :
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

Search for Freboldite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Freboldite :

A Bijoux Google Search for Freboldite
Adam's Minerals Google Search for Freboldite
Cape Minerals Google Search for Freboldite
Dakota Matrix Minerals Google Search for Freboldite
Excalibur Mineral Corp. Google Search for Freboldite
Exceptional Minerals Google Search for Freboldite
John Betts Fine Minerals Search for Freboldite
McDougall Minerals Google Search for Freboldite
Mineral News Website Link
Rock and Mineral Shows Google Search for Freboldite
Weinrich Minerals, Inc. Google Search for Freboldite

Ask about Freboldite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Freboldite

CoSe
Dana No: 02.08.11.10 Strunz No: 02.CC.05
Locality:

Notes: