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 % K₂O

Sodium 5.88 % Na 7.93 % Na₂O

Calcium 3.98 % Ca 5.56 % CaO

Europium 0.09 % Eu 0.11 % Eu₂O₃

Lanthanum 2.35 % La 2.76 % La₂O₃

Cerium 8.68 % Ce 10.16 % Ce₂O₃

Praeseodymium 1.09 % Pr 1.28 % Pr₂O₃

Samarium 0.89 % Sm 1.04 % Sm₂O₃

Gadolinium 0.92 % Gd 1.06 % Gd₂O₃

Yttrium 1.62 % Y 2.06 % Y₂O₃

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 % Al₂O₃

Silicon 18.80 % Si 40.22 % SiO₂

Hydrogen 0.25 % H 2.26 % H₂O

Neodymium 4.05 % Nd 4.72 % Nd₂O₃

Oxygen 38.91 % O

Fluorine 3.82 % F 3.82 % F

- % F -1.61 % -O=F₂

______ ______

100.00 % 96.99 % = TOTAL OXIDE

Empirical Formula:

Ce_0.82Nd_0.37Y_0.24Th_0.17Pr_0.1Sm_0.07Gd_0.07Eu_0.008Ca_0.77La_0.22Na₃�(H₂O)Ca_0.54K_0.01 Mn²⁺_0.48Na_0.4Mg_0.01Si_8.89Be_4.6Al_0.22(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

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

By Intensity(I/I_o): 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:

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:

PE_{Bussyite-(Ce)}= 163.73 barns/electron
U=PE_{Bussyite-(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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Print or Cut-and-Paste your Bussyite-(Ce) Specimen Label here :

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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