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Zimbabweite

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Zimbabweit
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Zimbabweit

gelbes Aggregat von Zimbabweit auf weißem Trägermaterial, St Anns Mine, Mwami, Karoi District, Mashonaland West, Simbabwe; BB < 1 mm, analysiert

Copyright: MinTreasure.com (Carsten Slotta)
Contribution: openpit 2020-06-09
Locality: St. Anne's Mine / Mwami / Karoi (Urungwe), Distrikt / Mashonaland West, Provinz / Simbabwe

Collectors Summary

Color Gelb
Streak color weiß
Hardness (Mohs) 5.0 - 5.5
Solubility - Säuren, Alkalien
Crystal System orthorhombisch, Ccmb

Chemism

Chem­ical formula

(Na,K)2PbAs43+(Ta,Nb,Ti)4O18

Chem­ical com­po­si­tion

Arsen, Blei, Natrium, Niob, Tantal, Titan, Kalium, Sauerstoff

Unit weight: 1413.8294407 u; Number of atoms in the formula: 29

Info

Empirical formula:

(Na0.75K0.25)2PbAs4(Ta0.6Nb0.3Ti0.1)4O18

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)

Oxygen

O

20.37

18

62.07

15.9994300

287.9897400

Sodium

Na

2.44

1.5

5.17

22.9897702

34.4846553

Potassium

K

1.38

0.5

1.72

39.0983100

19.5491550

Titanium

Ti

1.35

0.4

1.38

47.8671000

19.1468400

Arsenic

As

21.20

4

13.79

74.9216020

299.6864080

Niobium

Nb

7.89

1.2

4.14

92.9063820

111.4876584

Tantalum

Ta

30.72

2.4

8.28

180.9479100

434.2749840

Lead

Pb

14.66

1

3.45

207.2100000

207.2100000

Anal­y­sis wt%

Ta2O5 : 46.50, As2O3 : 26.50, PbO : 15.00, Nb2O5 : 4.80, Na2O : 3.10, K2O : 1.50, TiO2 : 1.40, BaO : 0.40 (Ref: Bulletin de Mineralogie 86)

Strunz 9th edi­tion incl. updates

4.JA.40

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
J: Antimonite, Bismuthite, Sulfite, Selenite, Tellurite
A: [Arsenite], [Antimonite], [Bismuthite]; ohne zusätzliche [Anionen], ohne H20
40:Zimbabweit-Gruppe

Lapis Clas­sifica­tion

IV/J.04-010

IV: OXIDE
J: Arsenite (mit As3+)
4: Arsenite mit [AsO3] 3--Inseln

Clas­sifica­tion by Hölzel

4.CO.280

4: OXIDES
C: R2O3 Sesquioxides
O: Pseudopyrochlore-Group
2: Tomichite-Derbylite-Group

Dana 8th edi­tion

08.07.10.01

08: Multiple Oxides with Nb, Ta, and Ti
07: Multiple Oxides with Nb, Ta, and Ti

IMA sta­tus

Anerkannt von der CNMNC

Min­eral sta­tus

anerkanntes Mineral

Optical Properties

Color

Gelb

Streak color

weiß

RI value α / ω / n

2.10>

RI value β

2.10>

RI value γ / ε

2.10>

2V angle

Biaxial (+) 80°~

Crystallography

Crystal Sys­tem

orthorhombisch

Class (H-M)

mmm

Space Group number

64

Space Group

Ccmb

Cell param­e­ters a (Å)

12.245

Cell param­e­ters b (Å)

15.287

Cell param­e­ters c (Å)

8.684

Cell param­e­ters a/b or c/a

0.801

Cell param­e­ters c/b

0.568

Cell param­e­ters α

90°

Cell param­e­ters β

90°

Cell param­e­ters γ

90°

Z

4

Volumne (ų)

1625.552

X-Ray Pow­der Diffrac­tion

3.823(50),
3.242(40),
3.195(100),
3.033(60),
2.990(70),
2.882(70),
2.548(50),
1.913(50)

XRD chart Zimbabweite

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

Crystal Structure 3D

Open larger view

Physical Properties

Hard­ness (Mohs)

5.0 - 5.5

VHN (Hard­ness Vick­ers)

470 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

6.2 (gemessen) 6.16 (berechnet)

5.777 ( ρ calc. Mineralienatlas )

Insta­bil­ity

- Säuren, Alkalien

Preface

Author (Name, Year)

Foord & Taggart & Gaines & Grubb & Kristiansen, 1986

References

Bulletin de Minéralogie 109 (1986), 331

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

Zimbabweite

(Na,K)2PbAs43+(Ta,Nb,Ti)4O18

orthorhombisch : mmm : Ccmb

4.JA.40

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

Zimbabweite

(Na,K)2PbAs43+(Ta,Nb,Ti)4O18

orthorhombisch : mmm : Ccmb

IV/J.04-010

Cafarsite

Ca5.9Mn1.7Ti3Fe3(As3þO3)12·4-5H2O

kubisch : m3 : Pn3

IV/J.04-020

Magnussonite

Mn2+10As3+6O18(OH,Cl)2

kubisch : m3m : Ia3d

IV/J.04-030

Armangite

Mn262+[CO3|(AsO2(OH))4|(AsO3)14]

trigonal : 3 : P3

IV/J.04-040

Ekatite

(Fe3+,Fe2+,Zn)12(AsO3)6(AsO3,SiO3OH)2(OH)6

hexagonal : 6mm : P63mc

IV/J.04-050

Tooeleite

Fe6(AsO3)4SO4(OH)4·4H2O

monoklin : 2/m : C2/m

IV/J.04-060

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

Tomichite

AsTi3(V,Fe)4O13(OH)

monoklin : 2/m : A2/m

4.CO.200

Graeserite

Fe3+4Ti3As3+O13(OH)

monoklin : 2/m : A2/m

4.CO.210

Derbylite

(Fe3+,Fe2+,Ti)7Sb3+O13(OH)

monoklin : 2/m : P21/m

4.CO.220

Hemloite

(Ti,V3+,Fe3+,Al)12As3+2O23(OH)

triklin : 1 : P1

4.CO.260

Batisivite

V8Ti6[Ba(Si2O)]O28

triklin : 1 : P1

4.CO.265

Zimbabweite

(Na,K)2PbAs43+(Ta,Nb,Ti)4O18

orthorhombisch : mmm : Ccmb

4.CO.280

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

Zimbabweite

(Na,K)2PbAs43+(Ta,Nb,Ti)4O18

orthorhombisch : mmm : Ccmb

08.07.10.01

Cesplumtantite

(Cs,Na)2(Pb,Sb3+)3Ta8O24

08.07.11.01

Koragoite

Mn2+2Mn3+Nb2(Nb,Ta)3W2O20

monoklin : 2 : P21

08.07.12.01

Carmichaelite

(Ti,Cr,Fe)(O,OH)2

monoklin : 2/m : P21/c

08.07.13.01

CNMNC (IMA)-Number

IMA 1984-034

CNMNC symbol

Symbol

Zbb

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

German pages

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

English pages

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

Russian pages

Webmineral.ru - search for: Зимбабвеит

Mineral Dealer

German pages

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

Locations with GPS information