Altisite Mineral Data

Altisite Mineral Data +

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General Altisite Information

Chemical Formula:

Na3K6Ti2Al2Si8O26Cl3

Composition:

Molecular Weight = 1,200.31 gm

Potassium 19.54 % K 23.54 % K₂O

Sodium 5.75 % Na 7.75 % Na₂O

Titanium 7.98 % Ti 13.31 % TiO₂

Aluminum 4.50 % Al 8.49 % Al₂O₃

Silicon 18.72 % Si 40.05 % SiO₂

Chlorine 8.86 % Cl 8.86 % Cl

- % Cl -2.00 % -O=Cl₂

Oxygen 34.66 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Na₃K₆Ti₂Al₂(Si₈O₂₆)Cl₃

Environment:

In the interstices of pectolite crystals in a hyperagpaitic pegmatite.

IMA Status:

Approved IMA 1994

Locality:

In a drill core from the Oleny Stream apatite deposit in the southeastern part of the Khibina alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Name for the elements Al, Ti, and Si in the composition.

Synonym:

ICSD 79851

IMA1993-055

PDF 49-1836

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Images:

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Try searching images.google.com or Mindat Picture Gallary for mineral pictures. Caution: The images retrieved may not be appropriate.

Altisite Crystallography

Axial Ratios:

a:b:c =0.6354:1:0.5612

Cell Dimensions:

a = 10.37, b = 16.32, c = 9.16, Z = 2; beta = 105.6° V = 1,493.12 Den(Calc)= 2.67

Crystal System:

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

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

By Intensity(I/I_o): 3.049(1), 2.835(0.84), 8.22(0.71),

Crystal Structure:

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Ferraris G , Ivaldi G , Khomyakov A P , European Journal of Mineralogy , 7 (1995) p.537-546, Altisite Na3K6Ti2[Al2Si8O26]Cl3 a new hyperalkaline, aluminosilicate from Kola Peninsula (Russia) related to, lemoynite: crystal structure and thermal evolution, Sample: RT, T = 20 C, before heating, Locality: Kola Peninsula, Russia

View Additional jPOWD Structure files for Altisite
[1] [2]

Physical Properties of Altisite

Cleavage:

None

Color:

White.

Density:

2.64 - 2.67, Average = 2.65

Diaphaniety:

Transparent

Fracture:

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

Habit:

Anhedral Grains - Granular minerals without the expression of crystal shapes

Hardness:

6 - Orthoclase

Luminescence:

Non-fluorescent.

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Altisite

Gladstone-Dale:

CI meas= 0.025 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.03 (Excellent) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2347,KPDmeas= 0.236,KC= 0.242

Optical Data:

Biaxial (+), a=1.601, b=1.625, g=1.654, bire=0.0530, 2V(Calc)=86, 2V(Meas)=85. Dispersion weak, r < v.

Pleochroism (x):

colorless.

Pleochroism (y):

colorless.

Pleochroism (z):

colorless.

Calculated Properties of Altisite

Electron Density:

r_electron=2.60 gm/cc
note: r_Altisite=2.66 gm/cc.

Fermion Index

Fermion Index = 0.01924
Boson Index = 0.98076

Photoelectric:

PE_Altisite= 4.79 barns/electron
U=PE_Altisite x r_electron= 12.45 barns/cc.

Radioactivity:

GRapi = 276.29 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Altisite - barely detectable

Altisite Classification

Dana Class:

74.3.3.1 (74)Phyllosilicate Modulated Layers

(74.3)with joined strips

(74.3.3)Altisite/lemoynite

74.3.3.1 Altisite Na3K6Ti2Al2Si8O26Cl3 C 2/m 2/m

74.3.3.2 Lemoynite (Na,K)2CaZr2Si10O26·5-6(H2O) C 2/m 2/m

74.3.3.3 Natrolemoynite! Na4Zr2Si10O26·9(H2O) C 2/m 2/m

Strunz Class:

VIII/G.09-05 VIII - Silicates

VIII/G - Intermediate between chain- and layered silicates

VIII/G.09 - Lemoynite - Loudounite series

VIII/G.09-05 Altisite Na3K6Ti2Al2Si8O26Cl3 C 2/m 2/m

VIII/G.09-08 Natrolemoynite! Na4Zr2Si10O26·9(H2O) C 2/m 2/m

VIII/G.09-10 Lemoynite (Na,K)2CaZr2Si10O26·5-6(H2O) C 2/m 2/m

VIII/G.09-20 Loudounite NaCa5Zr4Si16O40(OH)11·8(H2O) Mono

Other Altisite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.81,1996) OPTIC PROP.(MinRec)

See Also:

Links to other databases for Altisite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 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 Altisite Specimen Label here :

Altisite

Na3K6Ti2Al2Si8O26Cl3
Dana No: 74.3.3.1 Strunz No: VIII/G.09-05
Locality:

Notes: