Isolueshite Mineral Data

Isolueshite Mineral Data +

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General Isolueshite Information

Chemical Formula:

(Na,La,Ca)(Nb,Ti)O3

Composition:

Molecular Weight = 202.42 gm

Sodium 4.54 % Na 6.12 % Na₂O

Calcium 3.96 % Ca 5.54 % CaO

Lanthanum 27.45 % La 32.19 % La₂O₃

Titanium 5.91 % Ti 9.87 % TiO₂

Niobium 34.42 % Nb 49.24 % Nb₂O₅

Oxygen 23.71 % O

______ ______

100.00 % 102.96 % = TOTAL OXIDE

Empirical Formula:

Na_0.4La_0.4Ca_0.2Nb_0.75Ti_0.25O₃

Environment:

In a hydrothermally altered pegmatite vein cutting ijolite-urtite. A polymorph of lueshite.

IMA Status:

Approved IMA 1997 (Dana # Added)

Locality:

The Kukisvumchorr apatite deposit, southern part of the Khibina alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

The name reflects its isometric habit, optical isotropism and compositional similarity to its orthorhombic polymorph, lueshite.

Synonym:

ICSD 90040

IMA1995-024

PDF 50-1626

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Isolueshite Crystallography

Cell Dimensions:

a = 3.911, Z = 1; V = 59.82 Den(Calc)= 5.62

Crystal System:

Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: P m3m

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

By Intensity(I/I_o): 2.765(1), 1.953(0.53), 3.915(0.35),

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Crystal Structure:

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Krivovichev S V , Chakhmouradian A R , Mitchell R H , Filatov S K , Chukanov N V , European Journal of Mineralogy , 12 (2000) p.597-607, Crystal structure of isolueshite and its synthetic compositional analogue, Sample: isolueshite

View Additional jPOWD Structure files for Isolueshite
[1]

Physical Properties of Isolueshite

Cleavage:

None

Color:

Brownish black.

Density:

4.72

Diaphaniety:

Opaque to subtranslucent

Fracture:

Brittle - Uneven - Very brittle fracture producing uneven fragments.

Habit:

Euhedral Crystals - Occurs as well-formed crystals showing good external form.

Hardness:

5.5 - Knife Blade

Luster:

Adamantine

Streak:

pale yellow

Optical Properties of Isolueshite

Gladstone-Dale:

CI meas= -0.052 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= 0.116 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2135,KPDmeas= 0.2542,KC= 0.2417

Optical Data:

Isotropic, n=2.2.

RL Color:

Bluish with reddish-brown internal reflections.

Reflectivity

**Standardized Intensity (100%) Reflection Spectra of Isolueshite in Air**
λ	R	∑ R(λ)
460 nm	16.05
500 nm	15.50
540 nm	15.00
580 nm	14.70
620 nm	14.45
640 nm	14.40
660 nm	14.35
700 nm	14.35

**Calculated Relative Intensity Colors of Isolueshite in Air**
Relative Intensity	0%	70%	100%	140%	210%	280%	350%	420%	490%	560%	610%
R

Calculated Properties of Isolueshite

Electron Density:

r_electron=4.26 gm/cc
note: r_Isolueshite=4.72 gm/cc.

Fermion Index

Fermion Index = 0.00806
Boson Index = 0.99194

Photoelectric:

PE_Isolueshite= 186.08 barns/electron
U=PE_Isolueshite x r_electron= 793.61 barns/cc.

Radioactivity:

GRapi = 26,455.00 (Gamma Ray American Petroleum Institute Units)

Isolueshite is Radioactive as defined in 49 CFR 173.403. Greater than 70 Bq / gram.

**Estimated Radioactivity from Isolueshite** - 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 / 7.40 cm	614,852	1.66E-05	26,455.00	8.70
100 gm / 3.43 cm	61,485	1.66E-06	2,645.50	0.87
10 gm / 1.59 cm	6,149	1.66E-07	264.55	0.09
1 gm / 7.40 mm	615	1.66E-08	26.46	0.01
0.1 gm / 3.43 mm	61	1.66E-09	2.65	0.00
0.01 gm / 1.59 mm	6	1.66E-10	0.26	0.00
0.001 gm / 0.74 mm	1	1.66E-11	0.03	0.00

Weight of pure Isolueshite in grams (gm) and Calculated Diameter of a Sphere with a Density of 4.72 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 ( 1.37 % Th) From Sum REE Elements (27.45 % REE)

Isolueshite Classification

Dana Class:

4.3.3.6 (4)Simple Oxides

(4.3)with a cation charge of 3+ (A+++2 O3)

(4.3.3)Dana Group

4.3.3.1 Perovskite CaTiO3 P nma 2/m 2/m 2/m

4.3.3.2 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m

4.3.3.3 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m

4.3.3.4 Lueshite NaNbO3 P 222₁ 2 2 2

4.3.3.5 Tausonite SrTiO3 P m3m 4/m 3 2/m

4.3.3.6 Isolueshite ! (Na,La,Ca)(Nb,Ti)O3 P m3m 4/m 3 2/m

Strunz Class:

IV/C.10-55 IV - Oxides

IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds)

IV/C.10 - Perowskite series

IV/C.10-10 Uhligite Ca3(Ti,Al,Zr)9O20 Unk Cubic

IV/C.10-20 Perovskite CaTiO3 P nma 2/m 2/m 2/m

IV/C.10-30 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m

IV/C.10-40 Tausonite SrTiO3 P m3m 4/m 3 2/m

IV/C.10-50 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m

IV/C.10-55 Isolueshite (Na,La,Ca)(Nb,Ti)O3 P m3m 4/m 3 2/m

IV/C.10-60 Lueshite NaNbO3 P 222₁ 2 2 2

IV/C.10-70 Natroniobite NaNbO3 Mono

IV/C.10-80 Macedonite PbTiO3 P 4/mmm 4/m 2/m 2/m

Other Isolueshite Information

References:

NAME( MinRec) PHYS. PROP.(Eur. J. Min.,Vol.8,1996) OPTIC PROP.(MinRec, v 29, p 236)

See Also:

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

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Isolueshite

(Na,La,Ca)(Nb,Ti)O3
Dana No: 4.3.3.6 Strunz No: IV/C.10-55
Locality:

Notes: