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

Sobotkite

Formula:
(K,Ca
 
0.5
)
 
0.33
(Mg
 
0.66
Al
 
0.33
)
 
3
(Si
 
3
Al)O
 
10
(OH)
 
2
·1-5H
 
2
O
System:MonoclinicHardness:3
Name:Named for the "type locality" in Poland, from which it was originally described in 1976. Later found to be an Al-rich variety of saponite.
A variety of Saponite

Classification of Sobotkite

IMA status:Discredited 1987
Explanation of status:= Al-rich saponite
Dana 8th edition ID:71.3.1b.1

71 : PHYLLOSILICATES Sheets of Six-Membered Rings
3 : Sheets of 6-membered rings with 2:1 clays
mindat.org URL:http://www.mindat.org/min-7300.html
Please feel free to link to this page.

Physical Properties of Sobotkite

Hardness (Mohs):3

Crystallography of Sobotkite

Crystal System:Monoclinic

Optical Data of Sobotkite

Type:Biaxial
RI values: nα = 1.513 nβ = 1.525 nγ = 1.536
Maximum Birefringence:δ = 0.023

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

Chemical Properties of Sobotkite

Formula:
(K,Ca
 
0.5
)
 
0.33
(Mg
 
0.66
Al
 
0.33
)
 
3
(Si
 
3
Al)O
 
10
(OH)
 
2
·1-5H
 
2
O
Essential elements:Al, H, K, Mg, O, Si
All elements listed in formula:Al, Ca, H, K, Mg, O, Si

Other Names for Sobotkite

Other Languages:
German:Sobotkit
Spanish:Sobotkita

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 Sobotkite

Reference List:Czeslaw Haranczyk and Karol Prchazka (1974) Hydrous magnesium-nickel silicates from Wiry, Lower Silesia. Prace Muzeum Ziemi, 22, 3-64 (in Polish, with English summary, p.56-62)

In meteorites: AE Rubin 1997 MPS 32 231-47.

Internet Links for Sobotkite

Search Engines:
  • Look for Sobotkite on Google
  • Look for Sobotkite images on Google
    • Mineral Dealers:
  • Rare and Unusual minerals at Mineralogical Research Company
  • Buy Minerals and Crystals from Crystalarium.com
  • DAKOTA MATRIX offers Cabinet and Rare Species from Worldwide Localities.
  • Lapis Mineral Magazin
  • Search for - Sobotkite - on e-Rocks Mineral Sales & Auctions
  • The Arkenstone - Fine Minerals
  • Mineral Classics - Worldwide Collector Quality Minerals and Gems
  • Wendel Minerals - Auktion & Shop
  • Buy from David K Joyce minerals
  • Edwards Minerals - Fine Specimens
  • Buy fine minerals and gemstones from Pala International
  • High-end worldwide specimens & outstanding customer service
    • Jobs:
  • Mining & Geology Jobs

    • Page Sponsor

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

    Localities for Sobotkite

    (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.
    Chile
     
    • Arica and Parinacota Region
      • Arica Province
        • Los Camarones
    		Howard Minerals specimens, April 1984; Diederik Visser photo.
    Poland
     
    • Lower Silesia (Dolnośląskie)
      • Gogołów-Jordanów Massif
        • Wiry
    		Czeslaw Haranczyk and Karol Prchazka (1974) Hydrous magnesium-nickel silicates from Wiry, Lower Silesia. Prace Muzeum Ziemi, 22, 3-64 (in Polish, with English summary, p.56-62)
    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: 22nd Nov 2009 12:23:10