Byelorussite-(Ce) Mineral Data

Byelorussite-(Ce) Mineral Data +

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General Byelorussite-(Ce) Information

Chemical Formula:

NaBa2(Ce,La)2Mn++Ti2Si8O26(F,OH)·(H2O)

Composition:

Molecular Weight = 1,405.15 gm

Barium 19.55 % Ba 21.82 % BaO

Sodium 1.64 % Na 2.21 % Na₂O

Lanthanum 4.94 % La 5.80 % La₂O₃

Cerium 14.96 % Ce 17.52 % Ce₂O₃

Titanium 6.81 % Ti 11.37 % TiO₂

Manganese 3.91 % Mn 5.05 % MnO

Silicon 15.99 % Si 34.21 % SiO₂

Hydrogen 0.16 % H 1.44 % H₂O

Oxygen 31.03 % O

Fluorine 1.01 % F 1.01 % F

- % F -0.43 % -O=F₂

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

NaBa₂Ce_1.5La_0.5Mn²⁺Ti₂Si₈O₂₆F_0.75(OH)_0.25·(H₂O)

Environment:

In a salband of a quartz vein in lower Proterozoic metasomatized granosyenites.

IMA Status:

Approved IMA 1989

Locality:

In the Zhitkovitschskii district, west of Gomel, Belarus. Link to MinDat.org Location Data.

Name Origin:

For the occurrence in Belarus (formerly Byelorussia, USSR), and the "cerium" content.

Synonym:

IMA2000-D

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Byelorussite-(Ce) Crystallography

Axial Ratios:

a:b:c =1.0908:1:2.3095

Cell Dimensions:

a = 10.57, b = 9.69, c = 22.38, Z = 4; V = 2,292.23 Den(Calc)= 4.07

Crystal System:

Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: P 2₁2₁2₁

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

By Intensity(I/I_o): 2.783(1), 3(0.68), 2.95(0.63),

Physical Properties of Byelorussite-(Ce)

Cleavage:

[001] Perfect, [100] Indistinct

Color:

Yellow, Yellow brown, Light brown, Light yellow.

Density:

3.92

Diaphaniety:

Transparent

Hardness:

5.5-6 - Knife Blade-Orthoclase

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Byelorussite-(Ce)

Gladstone-Dale:

CI meas= -0.002 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.035 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1903,KPDmeas= 0.1975,KC= 0.1971

Optical Data:

Biaxial (+), a=1.743, b=1.76, g=1.82, bire=0.0770, 2V(Calc)=58, 2V(Meas)=58-62.

Calculated Properties of Byelorussite-(Ce)

Electron Density:

r_electron=3.61 gm/cc
note: r_{Byelorussite-(Ce)}=3.92 gm/cc.

Fermion Index

Fermion Index = 0.0513
Boson Index = 0.9487

Photoelectric:

PE_{Byelorussite-(Ce)}= 186.20 barns/electron
U=PE_{Byelorussite-(Ce)} x r_electron= 671.66 barns/cc.

Radioactivity:

GRapi = 19,532.46 (Gamma Ray American Petroleum Institute Units)

Byelorussite-(Ce) is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Byelorussite-(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 / 7.87 cm	445,760	1.20E-05	19,532.46	6.42
100 gm / 3.65 cm	44,576	1.20E-06	1,953.25	0.64
10 gm / 1.70 cm	4,458	1.20E-07	195.32	0.06
1 gm / 7.87 mm	446	1.20E-08	19.53	0.01
0.1 gm / 3.65 mm	45	1.20E-09	1.95	0.00
0.01 gm / 1.70 mm	4	1.20E-10	0.20	0.00
0.001 gm / 0.79 mm	0	1.20E-11	0.02	0.00

Weight of pure Byelorussite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.92 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
Estimated Thorium Activity ( 1.00 % Th) From Sum REE Elements (19.90 % REE)

Byelorussite-(Ce) Classification

Dana Class:

60.1.1b.4 (60)Cyclosilicate Four-Membered Rings

(60.1)as Titanosilicates

(60.1.1b)Joaquinite group (Ortho-joaquinite subgroup)

60.1.1b.1 Orthojoaquinite-(Ce) NaFeBa2Ce2Ti2[Si4O12]2O2(OH)·(H2O) Ccmm or Ccm21 Ortho

60.1.1b.2 Strontio-orthojoaquinite (Na,Fe)2Ba2Sr2Ti2[Si4O12]2(O,OH)2·(H2O) Pbcm or Pbc2 Ortho

60.1.1b.3 Bario-orthojoaquinite Fe2(Ba,Sr)4Ti2[Si4O12]O2·(H2O) Ccmm or Ccm2 Ortho

60.1.1b.4 Byelorussite-(Ce) NaBa2(Ce,La)2MnTi2Si8O26(F,OH)·(H2O) P 2₁2₁2₁ 2 2 2

60.1.1b.5 Orthojoaquinite-(La)! Ba2Na(La,Ce)2FeTi2Si8O26(OH,O,F)·H2O Ccmm 2/m 2/m 2/m

Strunz Class:

VII/E.08-85 VII - Phosphates, Arsenates and Vanadates

VII/E - Uranylphosphates and uranylvanadates with [UO2]2+ - [PO4 | AsO4]3- and [UO2]2+ - [V2O8]6-

VII/E.08 - Parsonsite - Byelorussite-(Ce) series

VII/E.08-10 Parsonsite Pb2(UO2)(PO4)2·2(H2O) P1 1

VII/E.08-20 Hallimondite Pb2(UO2)(AsO4)2 P1 1

VII/E.08-85 Byelorussite-(Ce) NaBa2(Ce,La)2MnTi2Si8O26(F,OH)·(H2O) P 2₁2₁2₁ 2 2 2

Other Byelorussite-(Ce) Information

References:

NAME( AntBidBlaNic2) PHYS. PROP.(Am.Min.,Vol.76,p665,1990) OPTIC PROP.(Am.Min.,Vol.76,p665,1990)

See Also:

Links to other databases for Byelorussite-(Ce) :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Byelorussite-(Ce)

NaBa2(Ce,La)2Mn++Ti2Si8O26(F,OH)·(H2O)
Dana No: 60.1.1b.4 Strunz No: VII/E.08-85
Locality:

Notes: