Paralabuntsovite-Mg Mineral Data

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General Paralabuntsovite-Mg Information

Chemical Formula:

Na8K8Mg8Ti16(Si4O12)8(O,OH)16• n(H2O)

Composition:

Molecular Weight = 4,336.11 gm

Potassium 7.21 % K 8.69 % K₂O

Sodium 4.24 % Na 5.72 % Na₂O

Magnesium 4.48 % Mg 7.44 % MgO

Titanium 17.67 % Ti 29.47 % TiO₂

Silicon 20.73 % Si 44.34 % SiO₂

Hydrogen 0.65 % H 5.82 % H₂O

Oxygen 45.02 % O

______ ______

100.00 % 101.48 % = TOTAL OXIDE

Empirical Formula:

Na₈K₈Mg₈Ti₁₆(Si₄O₁₂)₈O₈(OH)₈•10(H₂O)

IMA Status:

Proposed IMA 2000 (Dana # Added)

Locality:

Link to MinDat.org Location Data.

Name Origin:

Named for the structural and Mg analog of the labuntsovite group.

Synonym:

IMA2000-A

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Paralabuntsovite-Mg Crystallography

Axial Ratios:

a:b:c =1.1304:1:0.5652

Cell Dimensions:

a = 15.6, b = 13.8, c = 7.8, Z = 1; beta = 117° V = 1,496.16 Den(Calc)= 4.81

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/m

Physical Properties of Paralabuntsovite-Mg

Diaphaneity:

Translucent to transparent

Hardness:

6 - Orthoclase

Luster:

Vitreous (Glassy)

Optical Properties of Paralabuntsovite-Mg

Optical Data:

Biaxial (+)

NCalc= 2.3 - from Gladstone-Dale relationship (KC = 0.2706) where Ncalc=Dcalc*KC+1

Calculated Properties of Paralabuntsovite-Mg

Electron Density:

Bulk Density (Electron Density)=4.75 gm/cc
note: Specific Gravity of Paralabuntsovite-Mg =4.81 gm/cc.

Fermion Index:

Fermion Index = 0.03
Boson Index = 0.97

Photoelectric:

PE_{Paralabuntsovite-Mg}= 4.56 barns/electron
U=PE_{Paralabuntsovite-Mg} x r_electron= 21.64 barns/cc.

Radioactivity:

GRapi = 102.75 (Gamma Ray American Petroleum Institute Units)
Concentration of Paralabuntsovite-Mg per GRapi unit = 0.97 (%)

Estimated Radioactivity from Paralabuntsovite-Mg - barely detectable

Paralabuntsovite-Mg Classification

Dana Class:

60.01.03g.01 (60)Cyclosilicate Four-Membered Rings

(60.01)as Titanosilicates

(60.01.03g)Labuntsovite Group (Paralabuntsovite subgroup Monoclinic [I2/m])

60.01.03g.01 Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16•n(H2O) I2/m 2/m

Strunz Class:

09.CE.30f 09 - SILICATES (Germanates)

09.C - Cyclosilicates

09.CE -[Si4O12]8- 4-membered single rings (vierer-Einfachringe),

09.CE.30f Paralabuntsovite-Mg! Na8K8Mg8Ti16(Si4O12)8(O,OH)16•n(H2O) I2/m 2/m

Other Paralabuntsovite-Mg Information

See Also:

Links to other databases for Paralabuntsovite-Mg :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info

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Print or Cut-and-Paste your Paralabuntsovite-Mg Specimen Label here :

Paralabuntsovite-Mg

Na8K8Mg8Ti16(Si4O12)8(O,OH)16• n(H2O)
Dana No: 60.01.03g.01 Strunz No: 09.CE.30f
Locality:

Notes: