Bazirite Mineral Data

Bazirite Mineral Data +

General Bazirite Information

Chemical Formula:

BaZrSi3O9

Composition:

Molecular Weight = 456.80 gm

Barium 30.06 % Ba 33.57 % BaO

Zirconium 19.97 % Zr 26.98 % ZrO₂

Silicon 18.44 % Si 39.46 % SiO₂

Oxygen 31.52 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

BaZrSi₃O₉

Environment:

A late-stage interstitial mineral in aegrine-riebeckite granite (Rockall Island, Scotland).

IMA Status:

Approved IMA 1978

Locality:

On Apex Ridge, Rockall Island, in the North Atlantic Ocean, 294 km west of St. Kilda Island, Outer Hebrides, Scotland. Link to MinDat.org Location Data.

Name Origin:

For Barium and ZIRconium in the composition.

Synonym:

ICSD 71005

PDF 42-1361

Bazirite Image

Images:

Bazirite Sanbornite

Comments: Clear glassy minute grains of bazinite to 1mm through out matrix of milky-white sanbornite. The bazirite fluoresces light blue.
Location: Snow Cap mine, Rush Creek, Fresno Co., California, USA. Scale: 6.5 x 3 x 2.5cm.
© Tom Loomis / Dakota Matrix

Bazirite Crystallography

Axial Ratios:

a:c = 1:1.48027

Cell Dimensions:

a = 6.769, c = 10.02, Z = 2; V = 397.60 Den(Calc)= 3.82

Crystal System:

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

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

By Intensity(I/I_o): 2.8(1), 3.8(1), 5.85(0.35),

Crystal Structure:

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Hawthorne F C , Neues Jahrbuch fur Mineralogie, Monatshefte , 1987 (1987) p.16-30, The crystal chemistry of the benitoite group minerals and, structural relations in (Si3O9) ring structures, Sample: late-stage interstitial mineral in aegirine-riebeckite granite ,, Rockall Island, Scotland

Physical Properties of Bazirite

Cleavage:

[0001] Indistinct

Color:

Colorless.

Density:

3.82

Diaphaniety:

Transparent

Hardness:

6-6.5 - Orthoclase-Pyrite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Bazirite

Gladstone-Dale:

CI meas= 0.017 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.017 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1788,KPDmeas= 0.1788,KC= 0.182

Optical Data:

Uniaxial (+), w=1.6751-1.6813, e=1.685-1.691, bire=0.0097-0.0099.

Calculated Properties of Bazirite

Electron Density:

r_electron=3.51 gm/cc
note: r_Bazirite=3.82 gm/cc.

Fermion Index

Fermion Index = 0.08474
Boson Index = 0.91526

Photoelectric:

PE_Bazirite= 159.73 barns/electron
U=PE_Bazirite x r_electron= 561.01 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bazirite is Not Radioactive

Bazirite Classification

Dana Class:

59.1.1.1 (59)Cyclosilicate Three-Membered Rings

(59.1)anhydrous, no other anions

(59.1.1)Benitoite group

59.1.1.1 Bazirite BaZrSi3O9 P 6m2 6 m2

59.1.1.2 Benitoite BaTiSi3O9 P 6c2 6 m2

59.1.1.3 Pabstite Ba(Sn,Ti)Si3O9 P 6c2 6 m2

59.1.1.4 Wadeite K2ZrSi3O9 P 6₃/m 6/m

Strunz Class:

VIII/E.01-30 VIII - Silicates

VIII/E - Cyklosilicates, triplet rings [Si3O9]6-

VIII/E.01 - Benitoite series

VIII/E.01-10 Benitoite BaTiSi3O9 P 6c2 6 m2

VIII/E.01-20 Pabstite Ba(Sn,Ti)Si3O9 P 6c2 6 m2

VIII/E.01-30 Bazirite BaZrSi3O9 P 6m2 6 m2

VIII/E.01-40 Wadeite K2ZrSi3O9 P 6₃/m 6/m

Other Bazirite Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

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Bazirite

BaZrSi3O9
Dana No: 59.1.1.1 Strunz No: VIII/E.01-30
Locality:

Notes: