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Museumite (Muscovite-1M)

Additional Functions

Collectors Summary

Color dunkel silbergrau
Lustre Metallglanz
Hardness (Mohs) 1 - 1.5
Cleavages vollkommen {001}
Fracture hakig
Crystal System monoklin, P21/m, P21

Additional information / Summary

Die chemische Formel von Museumit wird neu mit [Pb2(Pb,Sb)2S8][Te,Au]2 angegeben.

Die Kristallstruktur ist bisher ungelöst. (European Journal Mineralogy, 20 (2008), 7-46)

Chemism

Chem­ical formula

Pb5AuSbTe2S12

Addi­tional chem. informa­tion

Nagyágit-Buckhornit gleichwertige Serie;

Formel lt. CNMNC (Juni 2013): [Pb2(Pb,Sb)2S8][Te,Au]2

Chem­ical com­po­si­tion

Antimon, Blei, Gold, Tellur, Schwefel

Unit weight: 1994.768652 u; Number of atoms in the formula: 21

Info

Empirical formula:

Pb5AuSbTe2S12

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Sulfur

S

19.29

12

57.14

32.0655000

384.7860000

Antimony

Sb

6.10

1

4.76

121.7601000

121.7601000

Tellurium

Te

12.79

2

9.52

127.6030000

255.2060000

Gold

Au

9.87

1

4.76

196.9665520

196.9665520

Lead

Pb

51.94

5

23.81

207.2100000

1,036.0500000

Anal­y­sis wt%

Pb : 52.00, Au : 10.68, Sb : 6.16, Te : 11.71, S : 19.43 (Ref: European Journal of Mineralogy 2004)

Strunz 9th edi­tion incl. updates

2.HB.20

2: Sulfide und Sulfosalze (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide, Sulfarsenite, Sulfantimonite, Sulfbismuthite)
H: Sulfosalze mit SnS als Vorbild
B: Mit Cu, Ag, Fe, Sn und Pb
20:Nagyágit-Gruppe

Lapis Clas­sifica­tion

II/D.15-015

II: SULFIDE UND SULFOSALZE (Sulfide, Selenide, Telluride, Arsenide, Antimonide, Bismutide)
D: Sulfide mit Metall : S,Se,Te < 1:1
15: Telluride mit Kupfer, Silber, Gold

Clas­sifica­tion by Hölzel

2.EA.250

2: SULFIDES
E: Me/S=1/2 (also < 1/2)
A: Me/S=1/2 with Cu,Ag,Au, etc.
2: Unclassified

Dana 8th edi­tion

02.11.14.01

02: Sulfide Minerals
11: Sulfides - Including Selenides and Tellurides where Am Bn Xp, with (m+n):p=2:3

IMA sta­tus

anerkannt 2003

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

dunkel silbergrau

Change in color

Reflektiertes Licht: grau, sehr niedrige Bireflektion und Pleochroismus, deutliche Anisotropie.

R(Luft): 38.4-40.3 (471 nm), 38.1-40.1 (548 nm), 37.5-39.4 (587 nm), 35.9-38.0 (652 nm)

Diaphane­ity (Trans­parency)

opak

Lus­tre

Metallglanz

Pleochro­ism

geringfügig

Reflec­tiv­ity Ø

38.46

Crystallography

Crystal Sys­tem

monoklin

Class (H-M)

2/m, 2

Space Group number

11, 4

Space Group

P21/m, P21

Cell param­e­ters a (Å)

4.361

Cell param­e­ters b (Å)

6.618

Cell param­e­ters c (Å)

20.858

Cell param­e­ters a/b or c/a

0.659

Cell param­e­ters c/b

3.152

Cell param­e­ters α

90°

Cell param­e­ters β

92.72

Cell param­e­ters γ

90°

Z

1

Volumne (ų)

601.307

X-Ray Pow­der Diffrac­tion

6.93(38), 4.80(52), 4.10(40), 3.56(100), 3.47(58), 3.31(40), 2.99(50), 2.98(30), 2.56(41)

XRD chart Museumite

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

Physical Properties

Hard­ness (Mohs)

1 - 1.5

VHN (Hard­ness Vick­ers)

42 (15g)

Density (g/cm³)

5.51 (berechnet)

5.508 ( ρ calc. Mineralienatlas )

Cleav­ages

vollkommen {001}

Frac­ture

hakig

(Co-)Type locality

(Co-)Type locality

Rumänien/Hunedoara, Kreis/Sacarimb (Nagyag)

Preface

Name from

Das Mineral wurde auf einer alten Museumsprobe entdeckt und zu Ehren aller Museen als Museumit benannt

Author (Name, Year)

Bindi & Cipriani, 2004

References

European Journal of Mineralogy 16 (2004), 835

European Journal Mineralogy, 20 (2008), 7-46 http://pubsites.uws.edu.au/ima-cnmnc/sulfosalts.pdf

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

Museumite

Pb5AuSbTe2S12

monoklin : 2/m, 2 : P21/m, P21

2.HB.20

Nagyágite

Pb(Pb,Sb)S2(Te,Au)

monoklin : 2/m : P21/m

2.HB.20

Buckhornite

(Pb2BiS3)(AuTe2)

orthorhombisch : mmm : Pmmn

2.HB.20

Watkinsonite

PbCu2Bi4(Se,S)8

monoklin : 2, m, 2/m : P21/m für das schwefelfreie Endglied
P2, Pm, P2/m

2.HB.20

Jaszczakite

[Bi3S3][AuS2]

orthorhombisch : mmm : Pmmn

2.HB.20b

Litochlebite

Ag2PbBi4Se8

monoklin : 2/m : P21/m

2.HB.20e

Luxembourgite

AgCuPbBi4Se8

monoklin : 2/m : P21/m

2.HB.20e

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

Montbrayite

(Au,Ag,Sb,Bi,Pb)23(Te,Sb,Bi,Bi,Pb)38

triklin : 1 : P1

II/D.15-010

Museumite

Pb5AuSbTe2S12

monoklin : 2/m, 2 : P21/m, P21

II/D.15-015

Nagyágite

Pb(Pb,Sb)S2(Te,Au)

monoklin : 2/m : P21/m

II/D.15-020

Buckhornite

(Pb2BiS3)(AuTe2)

orthorhombisch : mmm : Pmmn

II/D.15-030

Jonassonite

Au(Bi,Pb)5S4

II/D.15-040

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

Cameronite

Cu5-x(Cu,Ag)3+xTe10 {x=0.43}

monoklin : 2/m : C2/c

2.EA.200

Montbrayite

(Au,Ag,Sb,Bi,Pb)23(Te,Sb,Bi,Bi,Pb)38

triklin : 1 : P1

2.EA.220

Nagyágite

Pb(Pb,Sb)S2(Te,Au)

monoklin : 2/m : P21/m

2.EA.240

Museumite

Pb5AuSbTe2S12

monoklin : 2/m, 2 : P21/m, P21

2.EA.250

Buckhornite

(Pb2BiS3)(AuTe2)

orthorhombisch : mmm : Pmmn

2.EA.260

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

Nagyágite

Pb(Pb,Sb)S2(Te,Au)

monoklin : 2/m : P21/m

02.11.10.01

Buckhornite

(Pb2BiS3)(AuTe2)

orthorhombisch : mmm : Pmmn

02.11.11.01

Bowieite

(Rh,Ir,Pt)1.77S3

orthorhombisch : mmm : Pbcn

02.11.12.01

Kashinite

(Ir,Rh)2S3

orthorhombisch : mmm : Pbcn

02.11.12.02

Edgarite

FeNb3+2Nb4+S6

hexagonal : 6 : P63

02.11.13.01

Museumite

Pb5AuSbTe2S12

monoklin : 2/m, 2 : P21/m, P21

02.11.14.01

Other languages

German

Museumit

Spanish

Museumita

French

Museumite

English

Museumite

Russian

Мусковит-1M

Alternative Name

French

Muscovite-1M

IMA Number

IMA 2003-039

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Мусковит-1M

Mineral Dealer

German pages

hausen - Mineralgroßhandel - search for: Museumit
Crystal-Treasure.com - search for: Museumit
Bosse - search for: Museumit