Pittongite Mineral Data

General Pittongite Information

Chemical Formula:

Na0.22[(W,Fe+++)(O,OH)3•0.44H2O

Composition:

Molecular Weight = 222.44 gm

Potassium 0.05 % K 0.06 % K₂O

Sodium 2.27 % Na 3.07 % Na₂O

Calcium 0.36 % Ca 0.50 % CaO

Aluminum 0.24 % Al 0.46 % Al₂O₃

Iron 4.02 % Fe 5.17 % FeO

Hydrogen 0.53 % H 4.78 % H₂O

Tungsten 67.78 % W 85.47 % WO₃

Oxygen 24.74 % O

______ ______

100.00 % 99.51 % = TOTAL OXIDE

Empirical Formula:

Na_0.22(H₂O)_0.44Ca_0.02K_0.003W_0.82Fe²⁺_0.16Al_0.02O_2.7(OH)_0.3

Environment:

Formed by direct alteration of ferberite in the presence of acidic, oxidizing solutions containing sodiumNew structure type

IMA Status:

Approved IMA 2006 (Dana # Added)

Locality:

Mine dumps near the main shaft of a tungsten deposit 35 km west of Ballerat in the New England District of New South Wales, Australia. Link to MinDat.org Location Data.

Name Origin:

Named for the former village of Pittong near the deposit.

Synonym:

IMA2005-034a

Pittongite Crystallography

Axial Ratios:

a:c = 1:6.92972

Cell Dimensions:

a = 7.286, c = 50.49, Z = 36; V = 2,321.21 Den(Calc)= 5.73

Crystal System:

Hexagonal - Ditrigonal Dipyramidal H-M Symbol (6 m2) Space Group: P 6m2

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 3.153(1), 3.111(0.91), 1.823(0.76),1.578(0.64), 3.306(0.62), 2.45(0.59), 5.956(0.52), 1.192(0.44),

Physical Properties of Pittongite

Color:

Creamy yellow.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Hardness:

2-3 - Gypsum-Calcite

Luster:

Pearly

Streak:

cream

Optical Properties of Pittongite

Gladstone-Dale:

CI calc= -0.052 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1894,KC= 0.1801
Ncalc = 2.03

Optical Data:

Uniaxial (-), w=2.085.

Calculated Properties of Pittongite

Electron Density:

Bulk Density (Electron Density)=4.98 gm/cc
note: Specific Gravity of Pittongite =5.73 gm/cc.

Fermion Index:

Fermion Index = 0.09
Boson Index = 0.91

Photoelectric:

PE_Pittongite= 842.75 barns/electron
U=PE_Pittongite x r_electron=4,197.63 barns/cc.

Radioactivity:

GRapi = 0.66 (Gamma Ray American Petroleum Institute Units)
Concentration of Pittongite per GRapi unit =150.99 (%)

Estimated Radioactivity from Pittongite - barely detectable

Pittongite Classification

Dana Class:

49.02.06.01 (49)Basic and Hydrated Molybdates and Tungstates

(49.02)(Hydrated)

(49.02.06)Dana Group

49.02.06.01 Pittongite! Na0.22[(W,Fe)(O,OH)3•0.44H2O P 6m2 6 m2

Strunz Class:

04.DH.45 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.D - Metal:Oxygen = 1:2 and similar

04.DH -With large (ï¿½ medium-sized) cations; sheets of edge-sharing octahedra

04.DH.45 Pittongite! Na0.22[(W,Fe)(O,OH)3•0.44H2O P 6m2 6 m2

Other Pittongite Information

References:

NAME( AmMin, v93:704) PHYS. PROP.(AmMin, v93:704) OPTIC PROP.(AmMin, v93:704)

See Also:

Links to other databases for Pittongite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Pittongite Specimen Label here :

Pittongite

Na0.22[(W,Fe+++)(O,OH)3•0.44H2O
Dana No: 49.02.06.01 Strunz No: 04.DH.45
Locality:

Notes:

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