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Halloysite-10Å

Big Photo

Stradner Kogel Mt., Wilhelmsdorf, Bad Gleichenberg, Styria, Austria
© Fritz Schreiber

Show Halloysite-10Å Photos (2)
Formula:
Al
 
2
Si
 
2
O
 
5
(OH)
 
4
·2H
 
2
O
System:Monoclinic


Note: halloysite-10Å is not a polytype of halloysite.
It is an approved (grandfathered) species distinct from halloysite-7Å.

Synonyms are "endellite" (name for halloysite-10Å in European literature; discredited in 2006), "hydrated halloysite" and "hydrohalloysite."
Further localities are listed under "endellite".



Classification of Halloysite-10Å

IMA status:Valid - first described prior to 1959 (pre-IMA) - "Grandfathered"
mindat.org URL:http://www.mindat.org/min-10409.html
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Type Occurrence of Halloysite-10Å

Type Locality:Angleur, Liège, Liège Province, Belgium

Crystallography of Halloysite-10Å

Crystal System:Monoclinic
Class (H-M):m - Domatic
Cell Parameters:a = 5.1Å, b = 8.9Å, c = 10.25Å
β = 100.2°
Ratio:a:b:c = 0.573 : 1 : 1.152
Unit Cell Volume:V 457.89 ų (Calculated from Unit Cell)
Comment:Space group Cc.

Chemical Properties of Halloysite-10Å

Formula:
Al
 
2
Si
 
2
O
 
5
(OH)
 
4
·2H
 
2
O
Essential elements:Al, H, O, Si
All elements listed in formula:Al, H, O, Si

Other Names for Halloysite-10Å

Synonyms:
EndelliteHydrated HalloysiteHydrohalloysite
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 Halloysite-10Å

Reference List:Berthier (1826)

American Mineralogist 28 (1943), 1

Am. Mineral. 40 (1955) 1110

Powder Diffraction File (International Center for Diffraction Data) 29-1489

Clays and Clay Minerals 26 (1978), 25

Powder Diffraction 4 (1989), 19

Internet Links for Halloysite-10Å

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  • Raman and XRD data at RRUFF project
  • American Mineralogist Crystal Structure Database
  • Search for Halloysite-10Å in the Natural History Museum (London) online catalogue
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    Localities for Halloysite-10Å

    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.
    Austria
     
    • Styria
      • Bad Gleichenberg
        • Wilhelmsdorf
    		# Uwe Kolitsch (powder X-ray diffraction; Halloysite-10Å)
    Belgium
     
    • Liège Province
      • Liège
    		Ann.Chim.Phys., sér. 2 (1826) 32, 332-335
    Hungary
     
    • Veszprém Co.
      • Tapolcai Basin
        • Zalahaláp
    		Kónya-MÁFI,2008
    Russia
     
    • Urals Region
      • Southern Urals
        • Chelyabinsk Oblast'
          • Ufaley (Ufalei) District
    		Talovina, I.V., Lazarenkov, V.G., Ryzhkova, S.O., Ugol\'kov, V.L., and Vorontsova, N.I. (2008): Lithology and Mineral Resources 43(6), 588-595.
    Talovina, I.V., Lazarenkov, V.G., and Vorontsova, N.I. (2003): Lithology and Mineral Resources 38(5), 403-415.
        • Orenburgskaya Oblast'
          • Svetlyi
            • Buruktal District
              • Buruktal massif
    		Talovina, I.V., Lazarenkov, V.G., and Vorontsova, N.I. (2003): Lithology and Mineral Resources 38(5), 403-415.
    USA
     
    • California
      • San Diego Co.
        • Pala District
    		Jahns, R. A., and Wright, L. A. 1951. Gem and Lithium-Bearing Pegmatites of the Pala District, San Diego County, California. California Division of Mines and Geology Special Report 7A, p. 31.
    Mineral and/or Locality
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