Bussenite Mineral Data

Bussenite Mineral Data

General Bussenite Information

Chemical Formula:

Na2(Ba,Sr)2(Fe,Mn)TiSi2O7(CO3)(OH)3F

Composition:

Molecular Weight = 657.06 gm

Barium 26.13 % Ba 29.17 % BaO

Sodium 6.65 % Na 8.96 % Na₂O

Strontium 5.33 % Sr 6.31 % SrO

Calcium 1.22 % Ca 1.71 % CaO

Titanium 7.29 % Ti 12.16 % TiO₂

Manganese 3.34 % Mn 4.32 % MnO

Iron 5.10 % Fe 6.56 % FeO

Silicon 8.55 % Si 18.29 % SiO₂

Hydrogen 0.44 % H 3.98 % H₂O

Carbon 1.65 % C 6.03 % CO₂

Oxygen 31.41 % O

Fluorine 2.89 % F 2.89 % F

- % F -1.22 % -O=F₂

______ ______

100.00 % 99.15 % = TOTAL OXIDE

Empirical Formula:

Na_1.9Ba_1.25Sr_0.4Ca_0.2Fe²⁺_0.6Mn²⁺_0.4TiSi₂O_7.3(CO₃)_0.9(OH)_2.9F

Environment:

Sodalite-matrolite-calcite veinlet that cuts urtite.

IMA Status:

Approved IMA 2001 (Dana # Added)

Locality:

Mount Kukisvumchorr, Khibiny alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named for Irina V. Bussen (1915-), Russian petrologist.

Synonym:

IMA2000-035

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Bussenite Crystallography

Axial Ratios:

a:b:c =0.7695:1:2.3195

Cell Dimensions:

a = 5.419, b = 7.042, c = 16.334, Z = 2; alpha = 102.45°, beta = 93.2°, gamma = 90° V = 607.71 Den(Calc)= 3.59

Crystal System:

Triclinic - PedialH-M Symbol (1) Space Group: P1

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

By Intensity(I/I_o): 3.186(1)(113,114), 2.738(0.62)(123,121), 3.91(0.44)(112,103), 3.055(0.38)(114,113), 2.613(0.32)(122,124), 2.695(0.32

Physical Properties of Bussenite

Cleavage:

[001] Perfect, [110] Distinct, [110] Distinct

Color:

Yellowish brown.

Density:

3.63

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

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

Hardness:

4 - Fluorite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Bussenite

Gladstone-Dale:

CI meas= 0.043 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.032 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1949,KPDmeas= 0.1927,KC= 0.2013

Optical Data:

Biaxial (+), a=1.671, b=1.694, g=1.734, bire=0.0630, 2V(Calc)=76, 2V(Meas)=71. Dispersion strong, r > v.

Calculated Properties of Bussenite

Electron Density:

r_electron=3.35 gm/cc
note: r_Bussenite=3.59 gm/cc.

Fermion Index

Fermion Index = 0.06513
Boson Index = 0.93487

Photoelectric:

PE_Bussenite= 122.79 barns/electron
U=PE_Bussenite x r_electron= 410.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Bussenite is Not Radioactive

Bussenite Classification

Dana Class:

56.5.1.1 (56)Sorosilicate Si2O7 Groups and O, OH, F. and H2O

(56.5)Dana Type

(56.5.1)Dana Group

56.5.1.1 Bussenite ! Na2(Ba,Sr)2(Fe,Mn)TiSi2O7(CO3)(OH)3F P1 1

Strunz Class:

VIII/C.14-110 VIII - Silicates

VIII/C - Sorosilicates with [Si2O7]6-, with anions unfamiliar to tetraheders [O,OH,F]

VIII/C.14 - Fresnoite - Belkovite series

VIII/C.14-20 Muirite Ba10Ca2MnTiSi10O30(OH,Cl,F)10 P 4/mmm 4/m 2/m 2/m

VIII/C.14-30 Belkovite! Ba3(Nb,Ti)6(Si2O7)2O12 P 62m 6 m2

VIII/C.14-40 Murmanite Na3(Ti,Nb)4(Si2O7)2O4·4(H2O) P1 ? 1

VIII/C.14-50 Epistolite Na4Nb2Ti(Si2O7)2O2(OH)2·4(H2O) P1 1

VIII/C.14-70 Lomonosovite Na5Ti2O2(Si2O7)(PO4) P1 1

VIII/C.14-80 Vuonnemite Na11Nb2TiSi4O12(PO4)2O5F2 P1 1

VIII/C.14-110 Bussenite Na2(Ba,Sr)2(Fe,Mn)TiSi2O7(CO3)(OH)3F P1 1

VIII/C.14-120* Quadruphite-VII Na14CaMgTi4[Si2O7]2(PO4)4O4F2 P1 1

VIII/C.14-120 Quadruphite-VIII Na14CaMgTi4(Si2O7)2(PO4)4O4F2 P1 1

VIII/C.14-130 Sobolevite Na11(Na,Ca)4(Mg,Mn)Ti4(Si4O12)(PO4)4O5F3 P1 1

VIII/C.14-140* Polyphite-VII Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6 P1 1

VIII/C.14-140 Polyphite-VIII Na17Ca3Mg(Ti,Mn)4[Si2O7]2(PO4)6O2F6 P1 1

Other Bussenite Information

References:

NAME( AmMin, Vol 87, p 1509) PHYS. PROP.(AmMin, Vol 87, p 1509) OPTIC PROP.(AmMin, Vol 87, p 1509)

See Also:

Links to other databases for Bussenite :
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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Bussenite

Na2(Ba,Sr)2(Fe,Mn)TiSi2O7(CO3)(OH)3F
Dana No: 56.5.1.1 Strunz No: VIII/C.14-110
Locality:

Notes: