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Modderite (Modderit)

Additional Functions

Collectors Summary

Color bläulichweiß, stahlgrau
Streak color grau
Hardness (Mohs) 4
Crystal System orthorhombisch, Pmcn, Pna21

Chemism

Chem­ical formula

(Co,Fe)As

Chem­ical com­po­si­tion

Arsen, Eisen, Kobalt

Unit weight: 133.082802675 u; Number of atoms in the formula: 2

Info

Empirical formula:

(Co0.75Fe0.25)As

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Iron

Fe

10.49

0.25

12.50

55.8452000

13.9613000

Cobalt

Co

33.21

0.75

37.50

58.9332009

44.1999007

Arsenic

As

56.30

1

50.00

74.9216020

74.9216020

Anal­y­sis wt%

Ø Co : 38.30, Fe : 6.50, As : 56.70 (Ref: Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva, 1904-1974 77)

Strunz 9th edi­tion incl. updates

2.CC.15

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.
15:Westerveldit-Gruppe

Lapis Clas­sifica­tion

II/C.19-040

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

Clas­sifica­tion by Hölzel

2.CC.510

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

Dana 8th edi­tion

02.08.18.01

02: Sulfide Minerals
08: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=1:1

IMA sta­tus

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

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

bläulichweiß, stahlgrau

Streak color

grau

Diaphane­ity (Trans­parency)

opak

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm, mm2

Space Group number

62, 33

Space Group

Pmcn, Pna21

Cell param­e­ters a (Å)

3.458

Cell param­e­ters b (Å)

5.869

Cell param­e­ters c (Å)

5.292

Cell param­e­ters a/b or c/a

0.589

Cell param­e­ters c/b

0.902

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

107.401

X-Ray Pow­der Diffrac­tion

2.59(90),
2.55(60),
2.06(50),
1.97(100),
1.047(60),
0.999(60),
0.957(70),
0.927(60)

XRD chart Modderite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4

VHN (Hard­ness Vick­ers)

190 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

8.28 (berechnet)

8.23 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Cooper, 1923

References

Zapiski Vsesoyuznogo Mineralogicheskogo Obshchestva 106 (1977), 347

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

Modderite

(Co,Fe)As

orthorhombisch : mmm, mm2 : Pmcn, Pna21

2.CC.15

Minakawaite

RhSb

orthorhombisch : mmm : Pnma

2.CC.15

Cherepanovite

RhAs

orthorhombisch : mmm : Pnma

2.CC.15

Westerveldite

(Fe,Ni,Co)As

orthorhombisch : mmm : Pmcn

2.CC.15

Ruthenarsenite

(Ru,Ni)As

2.CC.15

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

Troilite

FeS

hexagonal : 6m2 : P62c

II/C.19-010

Pyrrhotite

Fe1-xS

II/C.19-020

'Jaipurite'

CoS

hexagonal : 6/mmm : P63/mmc

II/C.19-025

Westerveldite

(Fe,Ni,Co)As

orthorhombisch : mmm : Pmcn

II/C.19-030

Modderite

(Co,Fe)As

orthorhombisch : mmm, mm2 : Pmcn, Pna21

II/C.19-040

Smythite

(Fe,Ni)3+xS4 {x≈0-0.3}

trigonal : 3m : R3m

II/C.19-050

Achávalite

FeSe

hexagonal : 6/mmm : P63/mmc

II/C.19-060

Heideite

(Fe,Cr)1.15(Ti,Fe)2S4

monoklin : 2/m : I2/m

II/C.19-070

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

Westerveldite

(Fe,Ni,Co)As

orthorhombisch : mmm : Pmcn

2.CC.500

Modderite

(Co,Fe)As

orthorhombisch : mmm, mm2 : Pmcn, Pna21

2.CC.510

Ruthenarsenite

(Ru,Ni)As

2.CC.550

Cherepanovite

RhAs

orthorhombisch : mmm : Pnma

2.CC.560

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

Alternative Name

Lederkobold

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

German pages

DeWikiPedia - search for: Modderit
Google-Bilder-Suche - search for: Modderit
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English pages

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Russian pages

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