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Cryptophyllite

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Formula:
K
 
2
Ca[Si
 
4
O
 
10
] · 5H
 
2
O
System:MonoclinicColour:colourless


Closely related to shlykovite and mountainite.

Classification of Cryptophyllite

IMA status:Approved 2008
mindat.org URL:http://www.mindat.org/min-39306.html
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Type Occurrence of Cryptophyllite

Type Locality:Tsentral'nyi mine (Centralnyi Mine; Central Mine), Rasvumchorr Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia
General Appearance of Type Material:colorless lamellar intergrowths with shlykovite
Geological Setting of type material:alkaline igneous rock
Associated Minerals at type locality:
ShlykoviteLamprophylliteK FeldsparEudialyteAegirine

Physical Properties of Cryptophyllite

Colour:colourless

Crystallography of Cryptophyllite

Crystal System:Monoclinic
Cell Parameters:a = 6.4934(14) Å, b = 6.9919(5) Å, c = 32.087(3) Å
β = 94.680(12)°
Ratio:a:b:c = 0.929 : 1 : 4.589
Unit Cell Volume:V 1,451.93 ų (Calculated from Unit Cell)
X-Ray Powder Diffraction:
d-spacingIntensity
16.01 (100)
7.98 (24)
6.24 (48)
3.228 (22)
3.197 (27)
2.995 (47)
2.903 (84)
2.623 (23)

Chemical Properties of Cryptophyllite

Formula:
K
 
2
Ca[Si
 
4
O
 
10
] · 5H
 
2
O
Essential elements:Ca, H, K, O, Si
All elements listed in formula:Ca, H, K, O, Si

Other Names for Cryptophyllite

Synonyms:
IMA2008-061
Other Languages:

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 Cryptophyllite

Reference List:

- +
Pekov I.V., Zubkova N.V., Filinchuk Ya.E., Chukanov N.V., Zadov A.E., Pushcharovsky D.Yu., Gobechiya E.R. (2010): Shlykovite, KCa[Si4O9(OH)]·3H2O, and cryptophyllite, K2Ca[Si4O10]·5H2O, two new mineral species from the Khibiny alkaline complex, Kola Peninsula, Russia. Zapiski RMO, 139(1), 37-50.

Natalia V. Zubkova, Yaroslav E. Filinchuk, Igor V. Pekov, Dmitry Yu. Pushcharovsky, Elena R. Gobechiya (2010): Crystal structures of shlykovite and cryptophyllite. Comparative crystal chemistry of phyllosilicate minerals of the mountainite family. European Journal of Mineralogy 22, 547-555.

Internet Links for Cryptophyllite

Search Engines:
  • Look for Cryptophyllite on Google
  • Look for Cryptophyllite images on Google
    • External Links:
  • Look for Cryptophyllite on Webmineral
  • Look for Cryptophyllite on Athena Mineralogy
  • Look for Cryptophyllite on Mineralien Atlas
  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
    • Mineral Dealers:
  • Fine Minerals from Weinrich Minerals, Inc.
  • Cryptophyllite specimens for sale - minfind.com
  • Top quality minerals from Kristalle of California
  • Buy fine minerals and gemstones from Pala International
  • Wilensky Fine Minerals
  • Search for Cryptophyllite on Well-Arranged Molecules
  • Rare and Unusual minerals at Mineralogical Research Company
  • rare and unusual minerals mainly crystallized
  • SpiriferMinerals.com - high quality low prices
  • Buy minerals from YourMineralCollection
  • Find Cryptophyllite on www.crystalclassics.co.uk
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
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    • Localities for Cryptophyllite

    Hide Locality List
    (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.
    Russia
     
    • Northern Region
      • Murmanskaja Oblast'
        • Kola Peninsula
          • Khibiny Massif
            • Rasvumchorr Mt
    		Pekov I.V., Zubkova N.V., Filinchuk Ya.E., Chukanov N.V., Zadov A.E., Pushcharovsky D.Yu., Gobechiya E.R. Shlykovite, KCa[Si4O9(OH)]·3H2O, and cryptophyllite, K2Ca[Si4O10]·5H2O, two new mineral species from the Khibiny alkaline complex, Kola Peninsula, Russia,Zapiski RMO, 139(1),37(2010)
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    Copyright © Jolyon Ralph and Ida Chau 1993-2012. 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. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register.
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