Diversilite-(Ce) Mineral Data

Diversilite-(Ce) Mineral Data

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General Diversilite-(Ce) Information

Chemical Formula:

Na2(Ba,K)6Ce2Fe++Ti3Si12O36(OH)3(OH,H2O)9

Composition:

Molecular Weight = 2,272.68 gm

Potassium 4.77 % K 5.74 % K₂O

Barium 21.99 % Ba 24.56 % BaO

Sodium 2.02 % Na 2.73 % Na₂O

Strontium 0.35 % Sr 0.41 % SrO

Calcium 0.07 % Ca 0.10 % CaO

Lanthanum 4.10 % La 4.80 % La₂O₃

Cerium 5.67 % Ce 6.64 % Ce₂O₃

Praeseodymium 0.62 % Pr 0.73 % Pr₂O₃

Samarium 0.13 % Sm 0.15 % Sm₂O₃

Titanium 5.44 % Ti 9.07 % TiO₂

Manganese 0.82 % Mn 1.06 % MnO

Niobium 1.10 % Nb 1.58 % Nb₂O₅

Iron 2.38 % Fe 3.07 % FeO

Silicon 14.98 % Si 32.04 % SiO₂

Hydrogen 0.69 % H 6.14 % H₂O

Neodymium 1.02 % Nd 1.18 % Nd₂O₃

Oxygen 33.85 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₂Ba_3.64K_2.77Ce_0.92La_0.67Nd_0.16Pr_0.1Sm_0.02Mn²⁺_0.16Sr_0.09Ca_0.04Fe²⁺_0.97Mn²⁺_0.03 Ti_2.58Nb_0.27Mn²⁺_0.15Si_12.12O_36.36(H₂O)_3.76

Environment:

In a strongly mineralized rischorrite - ijolite - urtite pegmatite. New structure type.

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Mt. Uuksport, Khibina alkalne massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Name for the Latin diversus (hetrogeneous) and silicate, reflecting the main structural features.

Synonym:

IMA2002-043

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Diversilite-(Ce) Crystallography

Axial Ratios:

a:c = 1:5.66321

Cell Dimensions:

a = 10.713, c = 60.67, Z = 6; V = 6,030.13 Den(Calc)= 3.75

Crystal System:

Trigonal - RhombohedralH-M Symbol ( 3) Space Group: R 3

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

By Intensity(I/I_o): 3.236(1)(1.1.15), 2.026(0.61)(0.0.30), 2.642(0.44)(3.0.12),2.654(0.38)(223), 10.12(0.27)(006), 3.094(0.21)(300), 2.234(0.19)(2.2.15),

Physical Properties of Diversilite-(Ce)

Cleavage:

None

Color:

Yellowish orange.

Density:

3.68

Diaphaniety:

Transparent to Translucent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Fan Shaped - Occurs as radiating crystals shaped like a fan.

Habit:

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

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

5 - Apatite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Diversilite-(Ce)

Gladstone-Dale:

CI meas= 0.056 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.074 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1884,KPDmeas= 0.192,KC= 0.2034

Optical Data:

Uniaxial (+), w=1.705, e=1.708, bire=0.0030.

Calculated Properties of Diversilite-(Ce)

Electron Density:

r_electron=3.44 gm/cc
note: r_{Diversilite-(Ce)}=3.68 gm/cc.

Fermion Index

Fermion Index = 0.05663
Boson Index = 0.94337

Photoelectric:

PE_{Diversilite-(Ce)}= 156.07 barns/electron
U=PE_{Diversilite-(Ce)} x r_electron= 536.97 barns/cc.

Radioactivity:

GRapi = 11,575.17 (Gamma Ray American Petroleum Institute Units)

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

**Estimated Radioactivity from Diversilite-(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 / 8.04 cm	259,991	7.03E-06	11,575.17	3.81
100 gm / 3.73 cm	25,999	7.03E-07	1,157.52	0.38
10 gm / 1.73 cm	2,600	7.03E-08	115.75	0.04
1 gm / 8.04 mm	260	7.03E-09	11.58	0.00
0.1 gm / 3.73 mm	26	7.03E-10	1.16	0.00
0.01 gm / 1.73 mm	3	7.03E-11	0.12	0.00
0.001 gm / 0.80 mm	0	7.03E-12	0.01	0.00

Weight of pure Diversilite-(Ce) in grams (gm) and Calculated Diameter of a Sphere with a Density of 3.68 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 ( 0.58 % Th) From Sum REE Elements (11.53 % REE)

Diversilite-(Ce) Classification

Dana Class:

78.7.4.2 (78)Unclassified silicates

(78.7)wholly unclassified silicates

(78.7.4)Dana Group

78.7.4.1 Ilimaussite-(Ce) (Ba,Na)10K3Na4.5Ce5(Nb,Ti)6[Si12O36][Si9O18(O,OH)24]O6 R 32 3

78.7.4.2 Diversilite-(Ce) ! Na2(Ba,K)6Ce2FeTi3Si12O36(OH)3(OH,H2O)9 R 3 3

Strunz Class:

VIII/E.05-30 VIII - Silicates

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

VIII/E.05 - Cappelenite-(Y) - Stillwellite-(Ce) series

VIII/E.05-10 Cappelenite-(Y) Ba(Y,Ce)6Si3B6O24F2 P 3 3

VIII/E.05-20 Stillwellite-(Ce) (Ce,La,Ca)BSiO5 P 3₁ 3

VIII/E.05-30 Diversilite-(Ce) Na2(Ba,K)6Ce2FeTi3Si12O36(OH)3(OH,H2O)9 R 3 3

Other Diversilite-(Ce) Information

References:

NAME( CanMin, 42:923) PHYS. PROP.(CanMin, 42:923) OPTIC PROP.(CanMin, 42:923)

See Also:

Links to other databases for Diversilite-(Ce) :
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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Diversilite-(Ce)

Na2(Ba,K)6Ce2Fe++Ti3Si12O36(OH)3(OH,H2O)9
Dana No: 78.7.4.2 Strunz No: VIII/E.05-30
Locality:

Notes: