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Freboldite (Freboldit)

Collectors Summary

Color ähnlich Kupfernickel, aber intensiver grün in Öl
Hardness (Mohs) 5.25
Crystal System hexagonal, P63/mmc

Chemism

Chemical formula

CoSe

Chemical composition

Kobalt, Selen

Unit weight: 137.8962009 u; Number of atoms in the formula: 2

Info

Empirical formula:

CoSe

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Cobalt

Co

42.74

1

50.00

58.9332009

58.9332009
Selenium

Se

57.26

1

50.00

78.9630000

78.9630000

Analysis wt%

Co : 42.74, Se : 57.26 (Ref: berechnet)

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.20-040

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.310

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

02.08.11.10

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

Erstbeschreibung vor CNMNC-Gründung (1959), als Mineral meist anerkannt

Mineral status

anerkanntes Mineral

Optical Properties

Color

ähnlich Kupfernickel, aber intensiver grün in Öl

Diaphaneity (Transparency)

opak

Crystallography

Crystal System

hexagonal

Class (H-M)

6/mmm

Space Group number

194

Space Group

P63/mmc

Cell parameters a (Å)

3.61

Cell parameters b (Å)

-

Cell parameters c (Å)

5.28

Cell parameters a/b or c/a

1.463

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

2

Volumne (ų)

59.591

X-Ray Powder Diffraction

2.4(50),
2.05(100),
1.71(50),
1.08(50),
1.066(100),
0.992(50),
0.963(100)
XRD chart Freboldite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hardness (Mohs)

5.25

VHN (Hardness Vickers)

470 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

7.68 (berechnet)

7.685 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Deutschland/Niedersachsen/Goslar, Landkreis/Langelsheim/Lautenthal/Trogtal

Preface

Author (Name, Year)

Strunz, 1957

References

Handbook of Mineralogy (Anthony et al.), 1 (1990), 161

Other languages

German

Freboldit

Spanish

Freboldita

English

Freboldite

French

Freboldite

Russian

Фребольдит

CNMNC symbol

Symbol

Fbd

Locations with GPS information