General Isolueshite Information
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Chemical Formula: |
(Na,La,Ca)(Nb,Ti)O3 |
Composition: |
Molecular Weight = 202.42 gm |
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Sodium 4.54 % Na 6.12 % Na2O |
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Calcium 3.96 % Ca 5.54 % CaO |
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Lanthanum 27.45 % La 32.19 % La2O3 |
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Titanium 5.91 % Ti 9.87 % TiO2 |
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Niobium 34.42 % Nb 49.24 % Nb2O5 |
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Oxygen 23.71 % O |
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______ ______ |
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100.00 % 102.96 % = TOTAL OXIDE |
Empirical Formula: |
Na0.4La0.4Ca0.2Nb0.75Ti0.25O3 |
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 |
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IMA1995-024 |
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PDF 50-1626 |
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Isolueshite Crystallography
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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 |
X Ray Diffraction: |
By Intensity(I/Io): 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]
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Physical Properties of Isolueshite
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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 |
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Optical Properties of Isolueshite
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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 |
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∑ R(λ) |
| 460 nm |
16.05 |
 |
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| 500 nm |
15.50 |
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| 540 nm |
15.00 |
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| 580 nm |
14.70 |
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| 620 nm |
14.45 |
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| 640 nm |
14.40 |
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| 660 nm |
14.35 |
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| 700 nm |
14.35 |
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Calculated Relative Intensity Colors of Isolueshite in Air
Relative Intensity |
0% |
70% |
100% |
140% |
210% |
280% |
350% |
420% |
490% |
560% |
610% |
| R |
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Calculated Properties of Isolueshite
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Electron Density: |
relectron=4.26 gm/cc note: rIsolueshite =4.72 gm/cc. |
Fermion Index |
Fermion Index = 0.00806 Boson Index = 0.99194 |
Photoelectric: |
PEIsolueshite = 186.08 barns/electron U=PEIsolueshite x relectron= 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)
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Isolueshite Classification
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Dana Class: |
4.3.3.6 (4)Simple Oxides |
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(4.3)with a cation charge of 3+ (A+++2 O3) |
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(4.3.3)Dana Group |
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4.3.3.1 Perovskite CaTiO3 P nma 2/m 2/m 2/m |
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4.3.3.2 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m |
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4.3.3.3 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m |
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4.3.3.4 Lueshite NaNbO3 P 2221 2 2 2 |
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4.3.3.5 Tausonite SrTiO3 P m3m 4/m 3 2/m |
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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 |
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IV/C - Oxides with metal : oxygen = 2:3 (M2O3 and related compounds) |
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IV/C.10 - Perowskite series |
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IV/C.10-10 Uhligite Ca3(Ti,Al,Zr)9O20 Unk Cubic |
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IV/C.10-20 Perovskite CaTiO3 P nma 2/m 2/m 2/m |
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IV/C.10-30 Latrappite (Ca,Na)(Nb,Ti,Fe)O3 Pcmn 2/m 2/m 2/m |
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IV/C.10-40 Tausonite SrTiO3 P m3m 4/m 3 2/m |
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IV/C.10-50 Loparite-(Ce) (Ce,Na,Ca)2(Ti,Nb)2O6 P m3m 4/m 3 2/m |
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IV/C.10-55 Isolueshite (Na,La,Ca)(Nb,Ti)O3 P m3m 4/m 3 2/m |
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IV/C.10-60 Lueshite NaNbO3 P 2221 2 2 2 |
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IV/C.10-70 Natroniobite NaNbO3 Mono |
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IV/C.10-80 Macedonite PbTiO3 P 4/mmm 4/m 2/m 2/m |
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Other Isolueshite Information
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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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Print or Cut-and-Paste your Isolueshite Specimen Label here :
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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:
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