Sazhinite-(La) Mineral Data

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General Sazhinite-(La) Information

Chemical Formula:

Na3La[Si6O15]•2(H2O)

Composition:

Molecular Weight = 652.93 gm

Potassium 0.12 % K 0.14 % K₂O

Sodium 10.11 % Na 13.62 % Na₂O

Strontium 0.13 % Sr 0.16 % SrO

Lithium 0.01 % Li 0.02 % Li₂O

Calcium 0.49 % Ca 0.69 % CaO

Lanthanum 8.72 % La 10.23 % La₂O₃

Cerium 7.51 % Ce 8.80 % Ce₂O₃

Praeseodymium 0.43 % Pr 0.51 % Pr₂O₃

Yttrium 0.14 % Y 0.17 % Y₂O₃

Thorium 3.20 % Th 3.64 % ThO₂

Zirconium 0.14 % Zr 0.19 % ZrO₂

Uranium 0.36 % U 0.41 % UO₂

Silicon 25.25 % Si 54.02 % SiO₂

Boron 0.02 % B 0.05 % B₂O₃

Hydrogen 0.62 % H 5.52 % H₂O

Sulfur 0.29 % S 0.74 % SO₃

Neodymium 0.88 % Nd 1.03 % Nd₂O₃

Oxygen 41.17 % O

Fluorine 0.41 % F 0.41 % F

- % F -0.17 % -O=F₂

______ ______

100.00 % 100.17 % = TOTAL OXIDE

Empirical Formula:

Na_2.87K_0.02Sr_0.01La_0.41Ce_0.35Pr_0.02Nd_0.04Th_0.09U_0.01Y_0.01Zr_0.01Ca_0.08Li_0.01Si_5.87S_0.06 B_0.01O_14.8F_0.14·2(H₂O)

Environment:

Occurs in vesicles within the phonolite, together with other species crystallized from late-stage hydrothermal fluids. La-dominant analogue of sazhinite.

IMA Status:

Approved IMA 2004 (Dana # Added)

Locality:

Aris phonolite intrusion, Windhoek, Namibia. Link to MinDat.org Location Data.

Name Origin:

Named as the La-dominant analogue of sazhinite.

Name Pronunciation:

Sazhinite-(La) + Pronunciation

Synonym:

IMA2002-042a

Sazhinite-(La) Image

Images:

Sazhinite-(La)

Comments: White, fine-grained crystalling sazhinite-(La) lining vugs in matrix.
Location: Aris Phonolite, Windhoek, Namibia. Scale: Specimen Size 19x13x10 mm.
© Sergey Vasiliev / Systematic Mineralogy

Sazhinite-(La) Crystallography

Axial Ratios:

a:b:c =0.4779:1:0.4617

Cell Dimensions:

a = 7.415, b = 15.515, c = 7.164, Z = 2; V = 824.17 Den(Calc)= 2.63

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pmm2

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

By Intensity(I/I_o): 3.411(1), 3.252(0.83), 5.26(0.68),5.36(0.6), 7.42(0.59), 6.5(0.48), 3.226(0.45), 3.345(0.45),

Crystal Structure:

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Camara F , Ottolini L , Devouard B , Garvie L A J , Hawthorne F C , Mineralogical Magazine , 70 (2006) p.405-418, Sazhinite-(La), Na3LaSi6O15(H2O)2, a new mineral from the, Aris phonolite, Nambia: description and crystal structure, Locality: Aris phonolite, Nambia

Physical Properties of Sazhinite-(La)

Cleavage:

{010} Good, {001} Good

Color:

Creamy white.

Diaphaneity:

Translucent to transparent

Fracture:

Brittle - Generally displayed by glasses and most non-metallic minerals.

Habit:

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

Hardness:

3 - Calcite

Luster:

Vitreous - Pearly

Streak:

white

Optical Properties of Sazhinite-(La)

Gladstone-Dale:

CI calc= -0.023 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2023,KC= 0.1977
Ncalc = 1.52

Optical Data:

Biaxial (+), a=1.524, b=1.528, g=1.544, bire=0.0200

Calculated Properties of Sazhinite-(La)

Electron Density:

Bulk Density (Electron Density)=2.53 gm/cc
note: Specific Gravity of Sazhinite-(La) =2.63 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_{Sazhinite-(La)}= 162.48 barns/electron
U=PE_{Sazhinite-(La)} x r_electron= 410.83 barns/cc.

Radioactivity:

GRapi = 95,476.10 (Gamma Ray American Petroleum Institute Units)
Concentration of Sazhinite-(La) per GRapi unit = 10.47 (PPM)

Sazhinite-(La) 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) 318.58 ± 79.64 grams of pure Sazhinite-(La) .

**Estimated Radioactivity from Sazhinite-(La)** - 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 / 8.99 cm	2,085,468	5.64E-05	95,476.10	31.39
100 gm / 4.17 cm	208,547	5.64E-06	9,547.61	3.14
10 gm / 1.94 cm	20,855	5.64E-07	954.76	0.31
1 gm / 8.99 mm	2,085	5.64E-08	95.48	0.03
0.1 gm / 4.17 mm	209	5.64E-09	9.55	0.00
0.01 gm / 1.94 mm	21	5.64E-10	0.95	0.00
0.001 gm / 0.90 mm	2	5.64E-11	0.10	0.00

Weight of pure Sazhinite-(La) in grams (gm) and Calculated Diameter of a Sphere with a Density of 2.63 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

Sazhinite-(La) Classification

Dana Class:

72.02.01.04 (72)Phyllosilicate Two-Dimensional Infinite Sheets with Other Than Six-Membered Rings

(72.02)with 4-, 6-, and 8-membered rings

(72.02.01)Dalylite group

72.02.01.01 Dalyite K2ZrSi6O15 P1 1

72.02.01.02 Davanite K2TiSi6O15 P1 1

72.02.01.03 Sazhinite-(Ce) Na2Ce[Si6O14(OH)]•n(H2O),(n>=1.5) Pmm2 mm2

72.02.01.04 Sazhinite-(La)! Na3La[Si6O15]•2(H2O) Pmm2 2/m 2/m 2/m

Strunz Class:

09.EA.30 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EA -Single nets of tetrahedra with 4-, 5-, (6-), and 8-membered rings

09.EA.30 Sazhinite-(Ce) Na2Ce[Si6O14(OH)]•n(H2O),(n>=1.5) Pmm2 mm2

09.EA.30 Sazhinite-(La)! Na3La[Si6O15]•2(H2O) Pmm2 2/m 2/m 2/m

Other Sazhinite-(La) Information

References:

NAME( MinMag v70:405) PHYS. PROP.(MinMag v70:405) OPTIC PROP.(MinMag v70:405)

See Also:

Links to other databases for Sazhinite-(La) :
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
10 - Ruff.Info

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Print or Cut-and-Paste your Sazhinite-(La) Specimen Label here :

Sazhinite-(La)

Na3La[Si6O15]•2(H2O)
Dana No: 72.02.01.04 Strunz No: 09.EA.30
Locality:

Notes: