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Nekrasovite

Collectors Summary

Color rötlichbraun
Hardness (Mohs) 4.75
Crystal System kubisch, P43n

Chemism

Chem­ical formula

Cu13V(Sn,As,Sb)3S16

Chem­ical com­po­si­tion

Antimon, Arsen, Kupfer, Zinn, Schwefel, Vanadium

Unit weight: 1707.7281418 u; Number of atoms in the formula: 33

Info

Empirical formula:

Cu13V(Sn0.6As0.3Sb0.1)3S16

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

30.04

16

48.48

32.0655000

513.0480000

Vanadium

V

2.98

1

3.03

50.9415100

50.9415100

Copper

Cu

48.37

13

39.39

63.5463000

826.1019000

Arsenic

As

3.95

0.9

2.73

74.9216020

67.4294418

Tin

Sn

12.51

1.8

5.45

118.7107000

213.6792600

Antimony

Sb

2.14

0.3

0.91

121.7601000

36.5280300

Anal­y­sis wt%

Cu : 44.18, Fe : 4.11, V : 1.93, Sn : 11.40, As : 3.03, Sb : 4.20, S : 29.86 (Ref: Mineralogicheskii Zhurnal 84)

Strunz 9th edi­tion incl. updates

2.CB.30

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
C: Metallsulfide, M : S = 1 : 1 (und ähnliche)
B: mit Zink (Zn), Eisen (Fe), Kupfer (Cu), Silber (Ag), usw.
30:Germanit-Gruppe

Lapis Clas­sifica­tion

II/C.10-030

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

Clas­sifica­tion by Hölzel

2.CB.545

2: SULFIDES
C: Sulfides (etc) with Me/S=1/1
B: With Zn,Cu (etc), Coordination Number ~[4] Framework of Cornersharing Tetrahedra: Sphalerite-Germanite-Family
5: Germanite-Colusite-Mawsonite-Group

Dana 8th edi­tion

03.01.01.03

03: Sulfides - Sulfosalts
01: Sulfides - Sulfosalts where z/y > 4 - (A+)i (A++)j [By Cz], A=metals, B=semi-metals, C=non-metals
01: Colusite Group (Isometric: P-43n) with Cu and V

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

rötlichbraun

Diaphane­ity (Trans­parency)

opak

Crystallography

Crystal Sys­tem

kubisch

Class (H-M)

43m

Space Group number

218

Space Group

P43n

Cell param­e­ters a (Å)

10.73

Cell param­e­ters b (Å)

-

Cell param­e­ters c (Å)

-

Cell param­e­ters a/b or c/a

1

Cell param­e­ters c/b

-

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

2

Volumne (ų)

1235.376

X-Ray Pow­der Diffrac­tion

3.41(10),
3.09(100),
2.68(20),
1.894(80),
1.617(60),
1.230(50),
1.096(30),
1.033(30)

XRD chart Nekrasovite

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

Crystals 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

4.75

VHN (Hard­ness Vick­ers)

312 (20g)

Density (g/cm³)

4.62

4.591 ( ρ calc. Mineralienatlas )

Preface

Author (Name, Year)

Kovalenker & Evstigneeva & Malov & Trubkin & Gorshkov & Geinke, 1984

References

Mineralogicheskiy Zhurnal 6 (1984) (2), 88

Other languages

German

Nekrasovit

Spanish

Nekrasovita

French

Nekrasovite

English

Nekrasovite

Russian

Некрасовит

CNMNC (IMA)-Number

IMA 1983-051

CNMNC symbol

Symbol

Nek

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

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