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Sederholmite (Sederholmit)

Collectors Summary

Color gelb zu orange gelb
Lustre Metallglanz
Crystal System hexagonal, P63/mmc

Chemism

Chemical formula

NiSe

Chemical composition

Nickel, Selen

Unit weight: 137.65642 u; Number of atoms in the formula: 2

Info

Empirical formula:

NiSe

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Nickel

Ni

42.64

1

50.00

58.6934200

58.6934200

Selenium

Se

57.36

1

50.00

78.9630000

78.9630000

Analysis wt%

Ni : 36.80, Co : 1.90, Se : 61.30 (Ref: C.R.Soc.Geol.Finlande,64)

Strunz 9th edition incl. updates

2.CC.05

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
C: mit Nickel (Ni), Eisen (Fe), Cobalt (Co), usw.
05:Nickelin-Gruppe

Lapis Classification

II/C.20-050

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
C: Sulfide mit Metall : S,Se,Te ~ 1:1
20: Nickelin-Gruppe

Classification by Hölzel

2.CC.320

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
C: With Pd,Pt, etc. - Coordination Number ~[4], Planar
3: Coordination Number ~[3+3] Nickeline-Group

Dana 8th edition

02.08.11.03

02: Sulfide Minerals
08: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1
11: Nickeline Group (Hexagonal: P63/mmc)

IMA status

Anerkannt von der CNMNC

Mineral status

anerkanntes Mineral

Optical Properties

Color

gelb zu orange gelb

Diaphaneity (Transparency)

opak

Lustre

Metallglanz

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

194

Space Group

P63/mmc

Cell parameters a (Å)

3.624

Cell parameters b (Å)

-

Cell parameters c (Å)

5.288

Cell parameters a/b or c/a

1.459

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

60.145

X-Ray Powder Diffraction

2.70(100),
2.015(90),
1.806(80),
1.535(70),
1.50(70),
1.348(50),
1.155(50),
1.082(50)

XRD chart Sederholmite

Calculated from d-spacing and intensity at 0.1541838 nm (Cu)

Crystal Structure 3D

Open larger view

Physical Properties

Density (g/cm³)

7.6 (berechnet)

7.601 ( ρ calc. Mineralienatlas )

Preface

Name from

Jakob Johannes Sederholm (1863–1934), ehemelaiger Direktor des Geological Survey von Finland

Author (Name, Year)

Vuorelainen & Huhma & Häkli, 1964

References

Comptes Rendus, Société Géologique de Finlande 36 (1964), 113

American Mineralogist, 50 (1965), 519–520

Related minerals "Strunz Classification" (9. Edition) [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Achávalite

FeSe

hexagonal : 6/mmm : P63/mmc

2.CC.05

Breithauptite

NiSb

hexagonal : 6/mmm : P63/mmc

2.CC.05

Freboldite

CoSe

hexagonal : 6/mmm : P63/mmc

2.CC.05

'Hexatestibiopanickelite'

(Ni,Pd)(Te,Sb)

hexagonal : 6/mmm : P63/mmc

2.CC.05

'Imgreite'

NiTe

hexagonal : 6/mmm : P63/mmc

2.CC.05

'Jaipurite'

CoS

hexagonal : 6/mmm : P63/mmc

2.CC.05

Kotulskite

Pd(Te,Bi)2-x {x ≈ 0.4}

hexagonal : 6/mmm : P63/mmc

2.CC.05

Langisite

(Co,Ni)As

hexagonal : 6/mmm : P63/mmc

2.CC.05

Nickeline

NiAs

hexagonal : 6/mmm : P63/mmc

2.CC.05

Sederholmite

NiSe

hexagonal : 6/mmm : P63/mmc

2.CC.05

Sobolevskite

PdBi

2.CC.05

Stumpflite

Pt(Sb,Bi)

hexagonal : 6/mmm : P63/mmc

2.CC.05

Sudburyite

(Pd,Ni)Sb

hexagonal : 6/mmm : P63/mmc

2.CC.05

Vavřínite

Ni2SbTe2

2.CC.05

Zlatogorite

CuNiSb2

trigonal : 3m : P3m1

2.CC.05

Related minerals "Lapis Classification" [Mineral | Chemical formula | Crystal system : Class (H-M) : Space Group | Indenture number]

Sorosite

Cu1+x(Sn,Sb)

hexagonal : 6/mmm : P63/mmc

II/C.20-005

Langisite

(Co,Ni)As

hexagonal : 6/mmm : P63/mmc

II/C.20-010

Nickeline

NiAs

hexagonal : 6/mmm : P63/mmc

II/C.20-020

Breithauptite

NiSb

hexagonal : 6/mmm : P63/mmc

II/C.20-030

Freboldite

CoSe

hexagonal : 6/mmm : P63/mmc

II/C.20-040

Sederholmite

NiSe

hexagonal : 6/mmm : P63/mmc

II/C.20-050

Vavřínite

Ni2SbTe2

II/C.20-060

'Hexatestibiopanickelite'

(Ni,Pd)(Te,Sb)

hexagonal : 6/mmm : P63/mmc

II/C.20-070

Kotulskite

Pd(Te,Bi)2-x {x ≈ 0.4}

hexagonal : 6/mmm : P63/mmc

II/C.20-080

Sudburyite

(Pd,Ni)Sb

hexagonal : 6/mmm : P63/mmc

II/C.20-090

Stumpflite

Pt(Sb,Bi)

hexagonal : 6/mmm : P63/mmc

II/C.20-095

Polarite

Pd(Pb,Bi)

orthorhombisch : mm2 : Ccm21

II/C.20-100

Sobolevskite

PdBi

II/C.20-110

Ruthenarsenite

(Ru,Ni)As

II/C.20-120

Cherepanovite

RhAs

orthorhombisch : mmm : Pnma

II/C.20-130

Wassonite

TiS

trigonal : 3m : R3m

II/C.20-140

Related minerals "Hoelzel Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Achávalite

FeSe

hexagonal : 6/mmm : P63/mmc

2.CC.300

Freboldite

CoSe

hexagonal : 6/mmm : P63/mmc

2.CC.310

Sederholmite

NiSe

hexagonal : 6/mmm : P63/mmc

2.CC.320

'Imgreite'

NiTe

hexagonal : 6/mmm : P63/mmc

2.CC.325

Langisite

(Co,Ni)As

hexagonal : 6/mmm : P63/mmc

2.CC.340

Nickeline

NiAs

hexagonal : 6/mmm : P63/mmc

2.CC.350

Breithauptite

NiSb

hexagonal : 6/mmm : P63/mmc

2.CC.355

Zlatogorite

CuNiSb2

trigonal : 3m : P3m1

2.CC.360

Sorosite

Cu1+x(Sn,Sb)

hexagonal : 6/mmm : P63/mmc

2.CC.365

'Hexatestibiopanickelite'

(Ni,Pd)(Te,Sb)

hexagonal : 6/mmm : P63/mmc

2.CC.370

Sudburyite

(Pd,Ni)Sb

hexagonal : 6/mmm : P63/mmc

2.CC.380

Sobolevskite

PdBi

2.CC.385

Stumpflite

Pt(Sb,Bi)

hexagonal : 6/mmm : P63/mmc

2.CC.390

Vavřínite

Ni2SbTe2

2.CC.395

Related minerals "Dana 8. Classification" [Mineral | Chemical formula : Crystal system : Class (H-M) | Space Group | Indenture number]

Smythite

(Fe,Ni)3+xS4 {x≈0-0.3}

trigonal : 3m : R3m

02.08.10.02

Nickeline

NiAs

hexagonal : 6/mmm : P63/mmc

02.08.11.01

Breithauptite

NiSb

hexagonal : 6/mmm : P63/mmc

02.08.11.02

Sederholmite

NiSe

hexagonal : 6/mmm : P63/mmc

02.08.11.03

Sudburyite

(Pd,Ni)Sb

hexagonal : 6/mmm : P63/mmc

02.08.11.05

Kotulskite

Pd(Te,Bi)2-x {x ≈ 0.4}

hexagonal : 6/mmm : P63/mmc

02.08.11.06

Sobolevskite

PdBi

02.08.11.07

Stumpflite

Pt(Sb,Bi)

hexagonal : 6/mmm : P63/mmc

02.08.11.08

Langisite

(Co,Ni)As

hexagonal : 6/mmm : P63/mmc

02.08.11.09

Freboldite

CoSe

hexagonal : 6/mmm : P63/mmc

02.08.11.10

Sorosite

Cu1+x(Sn,Sb)

hexagonal : 6/mmm : P63/mmc

02.08.11.11

Covellite

CuS

hexagonal : 6/mmm : P63/mmc

02.08.12.01

Klockmannite

Cu5.2Se6

hexagonal : 6/mmm : P63/mmc

02.08.12.02

Vulcanite

CuTe

orthorhombisch : mmm : Pmnm

02.08.13.01

Cinnabar

HgS

trigonal : 32, 32 : P3121, P3221

02.08.14.01

Millerite

NiS

trigonal : 3m : R3m

02.08.16.01

Mäkinenite

gamma-NiSe

trigonal : 3m : R3m

02.08.16.02

Ruthenarsenite

(Ru,Ni)As

02.08.17.01

Cherepanovite

RhAs

orthorhombisch : mmm : Pnma

02.08.17.02

Modderite

(Co,Fe)As

orthorhombisch : mmm, mm2 : Pmcn, Pna21

02.08.18.01

Westerveldite

(Fe,Ni,Co)As

orthorhombisch : mmm : Pmcn

02.08.19.01

Other languages

German

Sederholmit

Spanish

Sederholmita

English

Sederholmite

French

Sederholmite

Russian

Седерхолмит

Automatic Links to external internet sources (Responsibility is with the operator)

German pages

DeWikiPedia - search for: Sederholmit
Google-Bilder-Suche - search for: Sederholmit
Mineralogisch-Petrographisches-Institut Hamburg - search for: Sederholmit

English pages

Mindat - search for: Sederholmite
Webmineral - search for:Sederholmite
Handbook-of-Mineralogy - search for: Sederholmite
RRUFF - Raman, XRD and other mineral data - search for: Sederholmite
RRUFF - References and PDF downloads - search for: Sederholmite
American-Mineralogist-Crystal-Structure-Database - search for: Sederholmite
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Russian pages

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Mineral Dealer

German pages

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Locations with GPS information




Notice: "Undefined variable: ub"