Bussyite-(Ce) Mineral Data
General Bussyite-(Ce) Information
Chemical Formula:
(Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4
Composition:
Molecular Weight = 1,329.21 gm
Potassium 0.04 % K 0.05 % K2 O
Sodium 5.88 % Na 7.93 % Na2 O
Calcium 3.98 % Ca 5.56 % CaO
Europium 0.09 % Eu 0.11 % Eu2 O3
Lanthanum 2.35 % La 2.76 % La2 O3
Cerium 8.68 % Ce 10.16 % Ce2 O3
Praeseodymium 1.09 % Pr 1.28 % Pr2 O3
Samarium 0.89 % Sm 1.04 % Sm2 O3
Gadolinium 0.92 % Gd 1.06 % Gd2 O3
Yttrium 1.62 % Y 2.06 % Y2 O3
Thorium 3.02 % Th 3.44 % ThO2
Magnesium 0.02 % Mg 0.04 % MgO
Manganese 2.00 % Mn 2.59 % MnO
Beryllium 3.12 % Be 8.67 % BeO
Aluminum 0.45 % Al 0.85 % Al2 O3
Silicon 18.80 % Si 40.22 % SiO2
Hydrogen 0.25 % H 2.26 % H2 O
Neodymium 4.05 % Nd 4.72 % Nd2 O3
Oxygen 38.91 % O
Fluorine 3.82 % F 3.82 % F
- %
F -1.61 % -O=F2
______ ______
100.00 % 96.99 % = TOTAL OXIDE
Empirical Formula:
Ce0.82 Nd0.37 Y0.24 Th0.17 Pr0.1 Sm0.07 Gd0.07 Eu0.008 Ca0.77 La0.22 Na3 �(H2 O)Ca0.54 K0.01
Mn2+ 0.48 Na0.4 Mg0.01 Si8.89 Be4.6 Al0.22 (OH)1.33
Environment:
Found in a serandite-bearing pocket, approximately 15 x 30 cm across, in a pegmatite hosted by nepheline syenite with albite phenocrysts. Strongly resembles that of semenovite-(Ce) and the closely related mineral harsti
IMA Status:
Approved IMA 2007 (Dana # Added)
Locality:
Poudrette quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada. Link to MinDat.org Location Data.
Name Origin:
Named for Antoine Alexandre Brutus Bussy (1794-1882), French chemist who is co-credited in isolating the element beryllium in August 1828.
Synonym:
IMA2007-039
Bussyite-(Ce) Image
Images:
Bussyite-(Ce)
Comments: SEM image of a spray of bussyite-(Ce) with hexagonal plates of catapleiite. Inset image shows detail of crystal terminations. (CanMin, v47:193).
Location: Poudrette quarry, Mont Saint-Hilaire, Rouville County, Quebec, Canada.
Scale: Picture size 1.5mm.
© Canadian Mineralogist
Bussyite-(Ce) Crystallography
Axial Ratios:
a:b:c =0.8374:1:1.1916
Cell Dimensions:
a = 11.654, b = 13.916, c = 16.583, Z = 4; beta = 95.86° V = 2,675.33 Den(Calc)= 3.30
Crystal System:
Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/c
X Ray Diffraction:
By Intensity(I/Io ): 8.12(1), 2.863(0.48), 3.543(0.39), 2.668(0.33), 2.959(0.24), 2.749(0.23), 3.454(0.21), 3.176(0.19),
Physical Properties of Bussyite-(Ce)
Cleavage:
{101} Perfect
Color:
Pale pinkish orange.
Density:
3
Diaphaneity:
Transparent to translucent
Fracture:
Brittle - Splintery - Brittle fracture leaving splintery fragments.
Habit:
Acicular - Occurs as needle-like crystals.
Luster:
Vitreous (Glassy)
Streak:
white
Optical Properties of Bussyite-(Ce)
Gladstone-Dale:
CI meas = -0.049 (Good) - where the CI = (1-KPDmeas /KC ) CI calc = 0.047 (Good) - where the CI = (1-KPDcalc /KC )
KPDcalc = 0.178,KPDmeas = 0.1958,KC = 0.1867 Ncalc = 1.56 - 1.62
Optical Data:
Biaxial (-), a=1.574, b=1.591, g=1.597, bire=0.0230, 2V(Calc)=60, 2V(Meas)=63. Dispersion dispersion not observed.
Calculated Properties of Bussyite-(Ce)
Electron Density:
Bulk Density (Electron Density)=3.14 gm/cc note: Specific Gravity of Bussyite-(Ce) =3.30 gm/cc.
Fermion Index:
Fermion Index = 0.05 Boson Index = 0.95
Photoelectric:
PEBussyite-(Ce) = 163.73 barns/electronU=PEBussyite-(Ce) x r electron = 514.33 barns/cc.
Radioactivity:
GRapi = 61,380.67 (Gamma Ray American Petroleum Institute Units)
Concentration of Bussyite-(Ce) per GRapi unit = 16.29 (PPM)
Bussyite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.
Estimated Maximum U.S. Postal Shipping Size
(10 mRem/hr limit, Unshielded 10 cm box)
495.54 ±123.89 grams of pure Bussyite-(Ce) .
Estimated Radioactivity from Bussyite-(Ce) - weak
Specimen Size Weight/Volume (Sphere) *
Calculated Activity Bequerols (Bq)
Calculated Activity Curies (Ci)
Estimated Activity GR(api)
Estimated Exposure (mRem** )/hr If Held in Hand For One Hour
1000 gm / 8.33 cm
1,354,125
3.66E-05
61,380.67
20.18
100 gm / 3.87 cm
135,413
3.66E-06
6,138.07
2.02
10 gm / 1.80 cm
13,541
3.66E-07
613.81
0.20
1 gm / 8.33 mm
1,354
3.66E-08
61.38
0.02
0.1 gm / 3.87 mm
135
3.66E-09
6.14
0.00
0.01 gm / 1.80 mm
14
3.66E-10
0.61
0.00
0.001 gm / 0.83 mm
1
3.66E-11
0.06
0.00
Weight of pure Bussyite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.30 gm/cc. *
Goverment Estimate of Average Annual Exposure (
360 mRem )
**
Note: 10 microsieverts/hr = 1 mRem/hr **
Max Permissable Adult Dose 50,000 mRem/yr (hands), 15,000 mRem/yr (eyes)
Lethal Dose LD(50) Exposure 400,000 to 500,000 mRem
Bussyite-(Ce) Classification
Dana Class:
72.05.02.08 (72) Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings
(72.05) with corrugated and complex layers
(72.05.02) Leucospenite and related species
72.05.02.01 Leucosphenite Na4BaTi2O2[B2Si10O28] C 2/m 2/m
72.05.02.02 Nordite-(Ce) (Ce,La,Ca)(Sr,Ca)Na2(Na,Mn)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m
72.05.02.03 Nordite-(La) (Na,Mn)3(Sr,Ca)(La,Ce)(Zn,Mg)Si6O17 Pcca 2/m 2/m 2/m
72.05.02.04 Semenovite (Na,Ca)9(Ce,La)2(Fe,Mn)(Si,Be)20(O,OH,F)48 Pmmn 2/m 2/m 2/m
72.05.02.05 Ferronordite-(Ce) ! Na3SrCeFeSi6O17 Pcca 2/m 2/m 2/m
72.05.02.06 Manganonordite-(Ce) ! Na3SrCeMnSi6O17 Pcca 2/m 2/m 2/m
72.05.02.07 Ferronordite-(La) ! Na3Sr(La,Ce)FeSi6O17 Pcca 2/m 2/m 2/m
72.05.02.08 Bussyite-(Ce) ! (Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4 C 2/c 2/m
Strunz Class:
09.EA.80 09 - SILICATES (Germanates)
09.E - Phyllosilicates
09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings
09.EA.80 Bussyite-(Ce) ! (Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4 C 2/c 2/m
Other Bussyite-(Ce) Information
References:
NAME( CanMin, v47:193) PHYS. PROP.(CanMin, v47:193) OPTIC PROP.(CanMin, v47:193)
See Also:
Links to other databases for Bussyite-(Ce) :
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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Bussyite-(Ce)
(Ce,REE)3(Na,H2O)6MnSi9Be5(O,OH)30F4
Dana No: 72.05.02.08 Strunz No: 09.EA.80
Locality:
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