Mindat Logo
Home Page Log In Message Board The Mindat Directory
Register Search Pages Chat Now! (2 online) Mindat Auctions

Thomsonite-Sr

Big Photo

Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
© 2008, J. Weissman

Formula:
(Sr,Ca)
 
2
Na[Al
 
5
Si
 
5
O
 
20
]·7H
 
2
O
System:OrthorhombicColour:Colorless
Hardness:5
Name:Named as the Strontium dominant analog of Thomsonite-Ca.


Zeolite Group. Natrolite Subgroup. The strontium analogue of Thomsonite-Ca.

Classification of Thomsonite-Sr

IMA status:Approved 2000
Strunz 8th edition ID:8/J.21-
Nickel-Strunz 10th (pending) edition ID:9.GA.10

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
A : Zeolites with T5O10 Units – The Fibrous Zeolites
mindat.org URL:http://www.mindat.org/min-28899.html
Please feel free to link to this page.

Type Occurrence of Thomsonite-Sr

Type Locality:Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
Geological Setting of type material:Hydrothermal veinlets cutting natrolite-bearing core of a pegmatite dike

Physical Properties of Thomsonite-Sr

Lustre:Vitreous
Diaphaneity (Transparency):Transparent
Colour:Colorless
Hardness (Mohs):5
Cleavage:Perfect
[100] Perfect, [010] Good
Density (measured):2.47 g/cm3
Density (calculated):2.62 g/cm3

Crystallography of Thomsonite-Sr

Crystal System:Orthorhombic
Class (H-M):mmm (2/m 2/m 2/m) - Dipyramidal
Cell Parameters:a = 13.05Å, b = 13.123Å, c = 13.241Å
Ratio:a:b:c = 0.994 : 1 : 1.009
Unit Cell Volume:V 2 ų
Z:4
X-Ray Powder Diffraction:
Image Loading

Radiation - Copper Kα
Data Set:
Horizontal Axis: ° to ° Vertical Axis: % Source Data: Filtered Data: Peaks:
Data courtesy of RRUFF project at University of Arizona, used with permission.
X-Ray Powder Diffraction:
d-spacingIntensity
2.691 (100)
2.86 (100)
2.96 (100)
3.49 (90)
3.19 (80)
4.66 (80)

Optical Data of Thomsonite-Sr

Type:Biaxial (+)
RI values: nα = 1.528 nβ = 1.532 nγ = 1.540
2V:Measured: 62° , Calculated: 72°
Maximum Birefringence:δ = 0.012

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak, r > v

Chemical Properties of Thomsonite-Sr

Formula:
(Sr,Ca)
 
2
Na[Al
 
5
Si
 
5
O
 
20
]·7H
 
2
O
All elements listed in formula:Al, Ca, H, Na, O, Si, Sr

Relationship of Thomsonite-Sr to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
9.GA.05Gonnardite
Na
 
2
Ca[Al
 
2
Si
 
3
O
 
10
]
 
2
 · 7H
 
2
O
9.GA.05Mesolite
Na
 
2
Ca
 
2
[Al
 
2
Si
 
3
O
 
10
]
 
3
 · 8H
 
2
O
9.GA.05Natrolite
Na
 
2
[Al
 
2
Si
 
3
O
 
10
] · 2H
 
2
O
9.GA.05Paranatrolite
Na
 
2
Al
 
2
Si
 
3
O
 
10
·3H
 
2
O
9.GA.05Scolecite
Ca[Al
 
2
Si
 
3
O
 
10
] · 3H
 
2
O
9.GA.10Thomsonite-Ca
NaCa
 
2
[Al
 
5
Si
 
5
O
 
20
] · 6H
 
2
O
9.GA.15Edingtonite
Ba[Al
 
2
Si
 
3
O
 
10
] · 4H
 
2
O
9.GA.15Kalborsite
K
 
6
[Cl|B(OH)
 
4
|Al
 
4
Si
 
6
O
 
20
]

Other Names for Thomsonite-Sr

Synonyms:
IMA2000-025
Other Languages:
German:Thomsonit-Sr
Russian:Томсонит-Sr

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Thomsonite-Sr

Reference List:Pekov, I.V., et al. (2001) Zapiski Vse. Mineral. Obshch., 130 (4), 46-55.
American Mineralogist: 87: 1511.

Lee, Y., J.A. Hriljac, A. Studer & T. Vogt (2004b), Anisotropic compression of edingtonite and thomsonite to 6 GPa at room temperature: Physics and Chemistry of Minerals: 31: 22-27.

Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 130(4): 46-55.

Doklady, Earth Science Sections (2001): 376(1): 101-104.

Internet Links for Thomsonite-Sr

Search Engines:
  • Look for Thomsonite-Sr on Google
  • Look for Thomsonite-Sr images on Google
    • External Links:
  • Look for Thomsonite-Sr on Webmineral
  • Look for Thomsonite-Sr on Athena Mineralogy
  • Look for Thomsonite-Sr on Wikipedia
  • Look for Thomsonite-Sr on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Thomsonite-Sr in the Natural History Museum (London) online catalogue
    • Mineral Dealers:
  • Find Thomsonite-Sr on www.crystalclassics.co.uk
  • Rare and Unusual minerals at Mineralogical Research Company
  • rare and unusual minerals mainly crystallized
  • Buy Fine Minerals from mineralsweb.com
  • Buy minerals from Mineralium.com
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Edwards Minerals - Fine Specimens
  • High-end worldwide specimens & outstanding customer service
  • Lapis Mineral Magazin
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Wendel Minerals - Auktion & Shop
  • Top quality minerals from Kristalle of California
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

    Sponsorship:This page is currently not sponsored. Click here to sponsor this page.

    Localities for Thomsonite-Sr

    Hide Locality List
    The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
    (TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
    Japan
     
    • Honshu Island
      • Chubu Region
        • Niigata Prefecture
    		www-jm.eps.s.u-tokyo.ac.jp/2002cd-rom/pdf/j038/j038-003_e.pdf.
    Miyajima, et al. (1999) Kobutsu-Gakkai Koen-Yoshi (Abstract of the Meeting of the Mineralogical Society of Japan), 93.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
    		Doklady Earth Sci. 376, 1, 101-104 (2001)
    Mineral and/or Locality
    Google
     
    www.mindat.org Web
    Copyright © Jolyon Ralph and Ida Chau 1993-2009. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 9th Nov 2009 05:56:14