Sederholmite Mineral Data (original) (raw)

General Sederholmite Information

Help on Chemical Formula: Chemical Formula:

NiSe

Help on Composition: Composition:

Molecular Weight = 137.65 gm

Nickel 42.64 % Ni

Selenium 57.36 % Se

______

100.00 %

Help on Empirical Formula: Empirical Formula:

NiSe

Help on Environment: Environment:

In calcite veins, in sills of albitite diabase in schist, associated with low-grade uranium mineralization. As grains in clausthalite.

Help on IMA Status: IMA Status:

Approved IMA 1964

Help on Locality: Locality:

Kuusamo, northeastern Finland Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named for J. J. Sederholm, former Director of the Gological Survey of Finland.

Help on Name Pronunciation: Name Pronunciation:

Sederholmite + Pronunciation Say SEDERHOLMITE

Help on Synonym: Synonym:

ICSD 29310

Nickel Selenide

PDF 18-188

Sederholmite Image

Click Here for Larger Sederholmite Image in a New Browser Window Images:

Click Here for Larger Sederholmite Image Sederholmite Kitkaite Penroseite Comments: B&W polished section image showing kitkaite replacing calcite in penroseite, clausthalite and sederholmite. Note the absence of the clausthalite envelope around kitkaite.. Location: Valley of the Kitka river in Kuusamo, northeast Finland. (AmMin, v50:581).Scale: 100 X. © American Mineralogist

Sederholmite Crystallography

Help on Axial Ratios: Axial Ratios:

a:c = 1:1.46301

Help on Cell Dimensions: Cell Dimensions:

a = 3.65, c = 5.34, Z = 2; V = 61.61 Den(Calc)= 7.42

Help on Crystal System: 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/Io): 2.7(1), 2.015(0.8), 1.806(0.6),

Click Here for Large Sederholmite Structure Window Crystal Structure:

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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 View Additional jPOWD Structure files for Sederholmite [1] [2] [3] [4] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------ |

Physical Properties of Sederholmite

Help on Cleavage: Cleavage:

None

Help on Color: Color:

Yellow, Orange yellow.

Help on Diaphaneity: Diaphaneity:

Opaque

Help on Habit: Habit:

Inclusions - Generally found as inclusions in other minerals.

Help on Hardness: Hardness:

2.5-3 - Finger Nail-Calcite

Help on Luster: Luster:

Metallic

Optical Properties of Sederholmite

Help on RL Anisotrophism: RL Anisotrophism:

Strong to distinct, in pinkish to greenish colors.

Help on RL Color: RL Color:

Yellow to orange yellow.

Help on RL Pleochroism: RL Pleochroism:

Distinct in shades of yellow.

Calculated Properties of Sederholmite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=6.68 gm/cc
note: Specific Gravity of Sederholmite =7.42 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.04
Boson Index = 0.96

Help on Photoelectric: Photoelectric:

PESederholmite = 63.01 barns/electron
U=PESederholmite x rElectron Density= 421.14 barns/cc.

Help on Radioactivity: Radioactivity:

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

Sederholmite Classification

Help on Dana Class: Dana Class:

02.08.11.03 (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

Help on Strunz Class: 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 Sederholmite Information

Help on References: References:

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

Help on See Also: See Also:

Links to other databases for Sederholmite :
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 Sederholmite Specimen Label here :

Sederholmite

NiSe
Dana No: 02.08.11.03 Strunz No: 02.CC.05
Locality:

Notes: