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Pittongite (Pittongit)

Collectors Summary

Color cremegelb
Streak color cremefarben
Lustre Perlmuttglanz in offenen Aggregaten, ansonsten erdig, durchsichtig
Hardness (Mohs) 2 - 3
Crystal System hexagonal, P6m2

Chemism

Chemical formula

Na0.22[(W,Fe3+)(O,OH)3·0.44H2O

Chemical composition

Eisen, Natrium, Sauerstoff, Wasserstoff, Wolfram

Unit weight: 213.580792254 u; Number of atoms in the formula: 6.29

Info

Empirical formula:

Na0.22[(W0.75Fe0.25)(O0.75(OH)0.25)3·0.44H2O

Element

Symbol

Weight%

Atoms

Atoms%

Atom weight (u)

Sum weight (u)
Hydrogen

H

0.77

1.63

25.91

1.0079470

1.6429536
Oxygen

O

25.77

3.44

54.69

15.9994300

55.0380392
Sodium

Na

2.37

0.22

3.50

22.9897702

5.0577494
Iron

Fe

6.54

0.25

3.97

55.8452000

13.9613000
Tungsten

W

64.56

0.75

11.92

183.8410000

137.8807500

Analysis wt%

WO3 : 84.15, Fe2O3 : 5.66, Al2O3 : 0.51, Na2O : 2.97, H2O : 4.73 (Ref: Canadian Mineralogist 2007)

Strunz 9th edition incl. updates

4.DH.45

4: Oxide, Hydroxide (Oxide, Hydroxide, V[5,6]-Vanadate, Arsenite, Antimonite, Bismutite, Sulfite, Selenite, Tellurite, Iodate)
D: Metall: Sauerstoff = 1:2 und vergleichbare
H: Mit großen (± mittelgroßen) [Kationen]; Lagen kantenverknüpfter Oktaeder
45:

Lapis Classification

IV/C.19-010

IV: OXIDE
C: Oxide mit Verhältnis Metall : Sauerstoff = 2:3 (M2O3 und verwandte Verbindungen)
19: Pyrochlor-Gruppe; ELSMOREIT-Untergruppe [W ± Fe]

Classification by Hölzel

4.EC.350

4: OXIDES
E: R2O5 RO3 and others
C: Woxides

IMA status

anerkannt 2006

Mineral status

anerkanntes Mineral

Optical Properties

Color

cremegelb

Streak color

cremefarben

Lustre

Perlmuttglanz in offenen Aggregaten, ansonsten erdig, durchsichtig

RI value α / ω / n

2.085

Ri mean

2.085

2V angle

Uniaxial (-)

Crystallography

Crystal System

hexagonal

Class (H-M)

6m2

Space Group number

187

Space Group

P6m2

Cell parameters a (Å)

7.286

Cell parameters b (Å)

-

Cell parameters c (Å)

50.49

Cell parameters a/b or c/a

6.930

Cell parameters c/b

-

Cell parameters α

90°

Cell parameters β

90°

Cell parameters γ

120°

Z

36

Volume (ų)

2321.209

X-Ray Powder Diffraction

5.956(52), 3.306(62), 3.153(100), 3.111(91), 2.450(59), 1.823(76), 1.578(64), 1.192(44)
XRD chart Pittongite

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

Physical Properties

Hardness (Mohs)

2 - 3

VHN (Hardness Vickers)

53 (ungefähre Angabe abgeleitet aus der Mohshärte)

Density (g/cm³)

5.72 ber.

5.5 ( ρ calc. Mineralienatlas )

(Co-)Type locality

(Co-)Type locality

Australien/Victoria/Ballarat/Pittong/Wolfram Mine

Paragenesis of type material

Wismut, Gold, Bismuthinit, Koechlinit, Elsmoreit

Preface

Name from

Typlokalität Pittong

Author (Name, Year)

William D. Birch, 2006

References

Neue Mineralien - IMA WEB Seite Veröffentlichungen 2006
Mineralien Welt 06/08, Steffen Jahn, Die neuen Mineralien 2007 - 2008

Other languages

German

Pittongit

English

Pittongite

Simplified Chinese

羟铁钨钠石

CNMNC (IMA)-Number

IMA 2005-034a

CNMNC symbol

Symbol

Pit

Locations with GPS information

IDs

GUSID (Global unique identifier short form) CyB0HbMr20S5jG8Jgyyw-A
GUID (Global unique identifier) 1D74200B-2BB3-44DB-B98C-6F09832CB0F8
Database ID 4389