Brizziite-III Mineral Data

Brizziite-III Mineral Data +

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General Brizziite-III Information

Chemical Formula:

NaSb+++++O3

Composition:

Molecular Weight = 192.74 gm

Sodium 11.93 % Na 16.08 % Na₂O

Antimony 63.17 % Sb 88.07 % SbO₃

Oxygen 24.90 % O

______ ______

100.00 % 104.15 % = TOTAL OXIDE

Empirical Formula:

NaSbO₃

Environment:

The result of deep weathering of stibnite.

IMA Status:

Approved IMA 1994

Locality:

The Cetine mine, approximately 20 km SW of Sienna, Tuscany, Italy. Link to MinDat.org Location Data.

Name Origin:

For Dr. Giancarlo Brizzi (1936-1992) who discovered the mineral.

Synonym:

IMA1993-044

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Brizziite-III Crystallography

Axial Ratios:

a:c = 1:3.00547

Cell Dimensions:

a = 5.301, c = 15.932, Z = 6; V = 387.72 Den(Calc)= 4.95

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 1.874(1), 1.471(0.69), 2.365(0.69),

Physical Properties of Brizziite-III

Cleavage:

[001] Perfect

Color:

Colorless.

Density:

4.8 - 4.95, Average = 4.87

Diaphaniety:

Transparent

Fracture:

Unknown - Minerals too small to observe fractures.

Habit:

Encrustations - Forms crust-like aggregates on matrix.

Habit:

Platy - Sheet forms (e.g. micas).

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Pearly

Streak:

white

Optical Properties of Brizziite-III

Dichroism (e):

colorless.

Dichroism (w):

colorless.

Gladstone-Dale:

CI meas= -3.939 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -3.864 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1486,KPDmeas= 0.1509,KC= 0.0305

Optical Data:

Uniaxial (-), e=1.631, w=1.84, bire=0.2090.

Calculated Properties of Brizziite-III

Electron Density:

r_electron=4.42 gm/cc
note: r_{Brizziite-III}=4.95 gm/cc.

Fermion Index

Fermion Index = 0.00011
Boson Index = 0.99989

Photoelectric:

PE_{Brizziite-III}= 208.40 barns/electron
U=PE_{Brizziite-III} x r_electron= 920.59 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Brizziite-III is Not Radioactive

Brizziite-III Classification

Dana Class:

4.3.5.6 (4)Simple Oxides

(4.3)with a cation charge of 3+ (A+++2 O3)

(4.3.5)Dana Group

4.3.5.1 Ilmenite FeTiO3 R 3 3

4.3.5.2 Geikielite MgTiO3 R 3 3

4.3.5.3 Pyrophanite MnTiO3 R 3 3

4.3.5.4 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

4.3.5.5 Melanostibite Mn(Sb,Fe)O3 R 3 3

4.3.5.6 Brizziite-III NaSbO3 R 3 3

4.3.5.7 Akimotoite! (Mg,Fe)SiO3 R 3 3

Strunz Class:

IV/C.05-60 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.05 - Ilmenite group, Geikilith - Brizziite series

IV/C.05-05 Akimotoite! (Mg,Fe)SiO3 R 3 3

IV/C.05-10 Geikielite MgTiO3 R 3 3

IV/C.05-20 Ilmenite FeTiO3 R 3 3

IV/C.05-30 Pyrophanite MnTiO3 R 3 3

IV/C.05-40 Ecandrewsite (Zn,Fe,Mn)TiO3 R 3 3

IV/C.05-50 Melanostibite Mn(Sb,Fe)O3 R 3 3

IV/C.05-60 Brizziite-III NaSbO3 R 3 3

IV/C.05-60* Brizziite-VII NaSbO3 R 3 3

Other Brizziite-III Information

References:

NAME( MinRec) PHYS. PROP.(37th List of New Min.,Min. Mag.,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Brizziite-III :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas

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Print or Cut-and-Paste your Brizziite-III Specimen Label here :

Brizziite-III

NaSb+++++O3
Dana No: 4.3.5.6 Strunz No: IV/C.05-60
Locality:

Notes: