Thomsonite-Sr Mineral Data

Thomsonite-Sr Mineral Data
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General Thomsonite-Sr Information

Help on Chemical Formula: Chemical Formula: (Sr,Ca)2Na[Al5Si5O20]•7(H2O)
Help on Composition: Composition: Molecular Weight = 892.94 gm
   Sodium      2.57 %  Na    3.47 % Na2O
   Strontium  13.74 %  Sr   16.25 % SrO
   Calcium     2.69 %  Ca    3.77 % CaO
   Aluminum   15.11 %  Al   28.55 % Al2O3
   Silicon    15.73 %  Si   33.64 % SiO2
   Hydrogen    1.60 %  H    14.32 % H2O
   Oxygen     48.56 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr1.4Ca0.6NaAl5Si5O20•7.1(H2O)
Help on Environment: Environment: Hydrothermal veinlets cutting natrolite-bearing core of a pegmatite dike. Thomsonite series zeolite; structure
Help on IMA Status: IMA Status: Approved IMA 2000 (Dana # Added)
Help on Locality: Locality: Rasvomchorr Mountain, Khibiny alkaline massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named as the Sr dominant analog of thomsonite-Ca.
Help on Name Pronunciation: Name Pronunciation: Thomsonite-Sr + Pronunciation Say THOMSONITE-SR
Help on Synonym: Synonym: IMA2000-025
 

Thomsonite-Sr Image

Click Here for Larger Thomsonite-Sr Image in a New Browser Window Images:
Click Here for Larger Thomsonite-Sr Image

Thomsonite-Sr

Comments: White, columnar-acicular crystals of shomsonite-Sr lining a vug.
Location: Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia. Scale: Picture Size 0.5 cm.
© Jeff Weissman / Photographic Guide to Mineral Species

Thomsonite-Sr Crystallography
Help on Axial Ratios: Axial Ratios: a:b:c =0.9944:1:1.0089
Help on Cell Dimensions: Cell Dimensions: a = 13.05, b = 13.123, c = 13.241, Z = 4; V = 2,267.59 Den(Calc)= 2.62
Help on Crystal System: Crystal System: Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pcnn
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.691(1)(242), 2.86(1)(142,241,412), 2.96(1)(024,204,042),3.49(0.9)(312,321), 3.19(0.8)(223,232,322), 4.66(0.8)(022,220), 6.63(0.7),
Help on Forms: Forms:

Mouse
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RMB - Cycle Display Modes
Drag1 - Manipulate Crystal
Drag2 - Resize
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<space> - Start-Stop Rotation
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Forms: ( 1 0 1) ( 0 1 1) ( 0 1 0) ( 1 1 1) ( 1 0 0) ( 1 1 0) ( 0 0 1)

Warning: this large pop-up is very compute intensive and may not work well with some computers.
Click Here for Large Thomsonite-Sr Structure Window Crystal Structure:

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drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
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 Help on Above


Gurbanova O A , Rastsvetaeva R K , Pekov I V , Turchkova A G , Doklady Akademii Nauk SSSR , 376 (2001) p.387-390, Crystal structure of strontium-rich thomsonite, Locality: Khibiny alkaline massif, Kola peninsula, Russia

 

Physical Properties of Thomsonite-Sr

Help on Cleavage: Cleavage: {100} Perfect, {010} Good
Help on Color: Color: Colorless.
Help on Density: Density: 2.47
Help on Diaphaneity: Diaphaneity: Transparent
Help on Fracture: Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals.
Help on Habit: Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).
Help on Hardness: Hardness: 5 - Apatite
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Thomsonite-Sr

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.057 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2036,KPDmeas= 0.2159,KC= 0.2158
Ncalc = 1.53 - 1.57
Help on Optical Data: Optical Data: Biaxial (+), a=1.528, b=1.532, g=1.54, bire=0.0120, 2V(Calc)=72, 2V(Meas)=62. Dispersion weak, r > v.
 

Calculated Properties of Thomsonite-Sr

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.45 gm/cc
note: Specific Gravity of Thomsonite-Sr =2.47 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEThomsonite-Sr = 16.12 barns/electron
U=PEThomsonite-Sr x rElectron Density= 39.44 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Thomsonite-Sr is Not Radioactive
 

Thomsonite-Sr Classification
Help on Dana Class: Dana Class: 77.01.05.10 (77)Tectosilicate Zeolite group
  (77.01)true zeolites
  (77.01.05)Natrolite and related species
 
77.01.05.01 Natrolite Na2[Al2Si3O10]•2(H2O) F dd2 mm2
 
77.01.05.02 Tetranatrolite? Na2[Al2Si3O10]•2(H2O) I 42d 4 2m
 
77.01.05.03 Paranatrolite Na2[Al2Si3O10]•3(H2O) Cc m
 
77.01.05.04 Mesolite Na2Ca2Al6Si9O30•8(H2O) C 2 2
 
77.01.05.05 Scolecite CaAl2Si3O10•3(H2O) Cc m
 
77.01.05.06 Edingtonite BaAl2Si3O10•4(H2O) P 21212 2 2 2
 
77.01.05.07 Gonnardite Na2CaAl4Si6O20•7(H2O) I 42d 4 2m
 
77.01.05.08 Cowlesite CaAl2Si3O10•5-6(H2O) P 2221, P mmm, Pmm2 Ortho
 
77.01.05.09 Thomsonite-Ca NaCa2Al5Si5O20•6(H2O) Pncn 2/m 2/m 2/m
 
77.01.05.10 Thomsonite-Sr! (Sr,Ca)2Na[Al5Si5O20]•7(H2O) Pcnn 2/m 2/m 2/m
 
77.01.05.11 Nabesite! Na2BeSi4O10•4(H2O) P 212121 2 2 2
Help on Strunz Class: Strunz Class: 09.GA.10 09 - SILICATES (Germanates)
  09.G - Tektosilicates with Zeolitic H2O
  09.GA -Zeolites with T5O10 Units – The Fibrous Zeolites
 
09.GA.10 Thomsonite-Ca NaCa2Al5Si5O20•6(H2O) Pncn 2/m 2/m 2/m
 
09.GA.10 Thomsonite-Sr! (Sr,Ca)2Na[Al5Si5O20]•7(H2O) Pcnn 2/m 2/m 2/m
 

Other Thomsonite-Sr Information
Help on References: References: NAME( AmMin, Vol 87, p 1511) PHYS. PROP.(AmMin, Vol 87, p 1511) OPTIC PROP.(AmMin, Vol 87, p 1511)
Help on See Also: See Also: Links to other databases for Thomsonite-Sr :
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 Thomsonite-Sr Specimen Label here :

Thomsonite-Sr

(Sr,Ca)2Na[Al5Si5O20]•7(H2O)
Dana No: 77.01.05.10 Strunz No: 09.GA.10
Locality:

 

Notes: