Stronalsite Mineral Data

General Stronalsite Information

Chemical Formula:

SrNa2Al4Si4O16

Composition:

Molecular Weight = 609.86 gm

Sodium 7.54 % Na 10.16 % Na₂O

Strontium 14.37 % Sr 16.99 % SrO

Aluminum 17.70 % Al 33.44 % Al₂O₃

Silicon 18.42 % Si 39.41 % SiO₂

Oxygen 41.98 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

SrNa₂Al₄Si₄O₁₆

Environment:

Basic tuff xenoliths.

IMA Status:

Approved IMA 1987

Locality:

Rendai, Kochi City, Japan. Link to MinDat.org Location Data.

Name Origin:

Named for its composition (Strontium, Na, Al, Si).

Name Pronunciation:

Stronalsite

Stronalsite Image

Images:

Stronalsite Jadeite

Comments: White stronalsite veinlets in massive pale green jadeite.
Location: Ohasa, Okayama, Japan. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Stronalsite Crystallography

Axial Ratios:

a:b:c =0.8518:1:1.6928

Cell Dimensions:

a = 8.408, b = 9.8699, c = 16.7083, Z = 4; V = 1,386.56 Den(Calc)= 2.92

Crystal System:

Orthorhombic - Pyramidal H-M Symbol (mm2) Space Group: Iba2

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

By Intensity(I/I_o): 3.206(1), 3.504(0.8), 3.184(0.72),

Physical Properties of Stronalsite

Cleavage:

{100} Good, {001} Good

Color:

White.

Density:

2.95

Diaphaneity:

Transparent

Hardness:

6.5 - Pyrite

Luster:

Vitreous (Glassy)

Streak:

white

Optical Properties of Stronalsite

Gladstone-Dale:

CI meas= 0.015 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.005 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1942,KPDmeas= 0.1922,KC= 0.1951
Ncalc = 1.57 - 1.58

Optical Data:

Biaxial (+), a=1.563, b=1.564, g=1.574, bire=0.0110, 2V(Calc)=36, 2V(Meas)=32.

Calculated Properties of Stronalsite

Electron Density:

Bulk Density (Electron Density)=2.83 gm/cc
note: Specific Gravity of Stronalsite =2.92 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Stronalsite= 17.00 barns/electron
U=PE_Stronalsite x rElectron Density= 48.18 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Stronalsite is Not Radioactive

Stronalsite Classification

Dana Class:

76.01.06.02 (76)Tectosilicate Al-Si Framework

(76.01)with Al-Si frameworks

(76.01.06)Banalsite group

76.01.06.01 Banalsite BaNa2Al4Si4O16 Iba2 mm2

76.01.06.02 Stronalsite SrNa2Al4Si4O16 Iba2 mm2

76.01.06.03 Lisetite Na2CaAl4Si4O16 Pbc2 mm2

76.01.06.04 Svyatoslavite CaAl2Si2O8 P 2₁ 2

Strunz Class:

09.FA.60 09 - SILICATES (Germanates)

09.F - Tektosilicates without Zeolitic H2O

09.FA -Tektosilicates without additional non-tetrahedral anions, (Al,B):Si = 1:1

09.FA.60 Banalsite BaNa2Al4Si4O16 Iba2 mm2

09.FA.60 Stronalsite SrNa2Al4Si4O16 Iba2 mm2

Other Stronalsite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, AmMin 91:1953) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Stronalsite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Stronalsite

SrNa2Al4Si4O16
Dana No: 76.01.06.02 Strunz No: 09.FA.60
Locality:

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