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Kerolite

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Formula:
(Mg,Ni)3Si4O10(OH)2 · nH2O (n ~ 1)
Ni not essential
System:
Monoclinic
Colour:
white, brown, green, ...
Hardness:
2 - 2½
Originally reported from Ząbkowice (Frankenstein), Ząbkowice District, Lower Silesia (Dolnośląskie), Poland. Named by Breithaupt in 1823, after waxy appearance.

Detailed characterization of material from several localities by Brindley et al. (1977, 1979) implies that kerolite can be regarded as nanocrystalline (they estimate platelets 50 Å thick and 150 Å wide), stacking-disordered talc with a slightly enlarged layer spacing and significant water content,both as interlayer molecules and as hydroxyl groups strongly bound to the Mg silicate structure.

Kerolite is not listed as a valid species in the IMA list of minerals, but does not appear to have been formally discredited.

Classification of Kerolite

'Grandfathered' (first described prior to 1959)
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Physical Properties of Kerolite

Waxy, Dull
Colour:
white, brown, green, colorless
Streak:
white
Hardness (Mohs):
2 - 2½

Crystallography of Kerolite

Crystal System:
Monoclinic
Cell Parameters:
b = 9.14Å
Morphology:
Aggregates of submicron-scale platelets.
Comment:
Diffraction peaks are few and broad; d(001) = 9.6 Å

Chemical Properties of Kerolite

Formula:
(Mg,Ni)3Si4O10(OH)2 · nH2O (n ~ 1)

Ni not essential
All elements listed in formula:

Other Names for Kerolite

Name in Other Languages:

Other Information

IR Spectrum:
IR shows Si-O and lattice modes at 1000 cm-1 and below, 1620 cm-1 band from interlayer water, and multiple bands at 3600-3700 cm-1 due to O-H stretches
Thermal Behaviour:
Loses about 4% of mass as water vapor over 110-700oC; then abruptly loses another 5% (compare macrocrystalline talc, losing very little until 5% loss at 850 oC).
Other Information:
Solubility and thermodynamic properties in Stoessel (1988)
Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Kerolite

Reference List:
Brindley, G.W., Bish, D.L. and Wan, H.-M. (1977) Teh nature of kerolite, its relation to talc and stevensite. Mineralogical Magazine: 41: 443-452.

Brindley, G.W., Bish, D.L. and Wan, H.-M. (1979) Compositions, structures, and properties of nickel-containing minerals in the kerolite-pimelite series. American Mineralogist: 64: 615-625.

Stoessel, R.K. (1988) 25oC and 1 atm dissolution experiments of sepiolite and kerolite. Geochimica et Cosmochimica Acta: 52: 365-374

Internet Links for Kerolite

Localities for Kerolite

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 for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Australia
 
  • Western Australia
    • Meekatharra Shire
Fetherston, J. M., Stocklmayer, S. M. and Stocklmayer, V. C. (2013): Gemstones of Western Australia. Mineral Resources Bulletin 25, Geological Survey of Western Australia, Perth, Australia, 306 pp.
Cameroon
 
  • East Region
    • Lomié
Lambert, R.J., and Noble, A.C. (2008): Nkamouna Cobalt Project Feasibility Study. Pincock, Allen & Holt NI 43-101 Technical Report for Geovic Mining Corp.
Czech Republic
 
  • Moravia (Mähren; Maehren)
    • Moravia-Silesia Region
      • Nový Jičín
        • Petřkovice
Jirásek, J., Matýsek, D. (2015): Příspěvek k mineralogii Petřkovické hory (Morava, Česká republika). Acta Mus. Morav., Sci. geol., 100, 1, 23–29. (with English summary).
    • Vysočina Region
      • Žďár nad Sázavou
        • Věžná
Dosbaba, M., & Novák, M. (2012). Quartz replacement by “kerolite” in graphic quartz–feldspar intergrowths from the Věžná I pegmatite, Czech Republic: a complex desilication process related to episyenitization. The Canadian Mineralogist, 50(6), 1609-1622.
Indonesia
 
  • Sulawesi Island (Celebes Island)
    • Sulawesi Selatan Province (South Sulawesi Province)
      • Soroako
Sufriadin, S. (2012). Thermal and Infrared Studies of Garnierite from the Soroako Nickeliferous Laterite Deposit, Sulawesi, Indonesia. Indonesian Journal of Geology, 7(2).
Sufriadin, S. (2012). Thermal and Infrared Studies of Garnierite from the Soroako Nickeliferous Laterite Deposit, Sulawesi, Indonesia. Indonesian Journal of Geology, 7(2).
Italy
 
  • Piedmont
    • Torino Province
      • Lanzo Valleys
        • Balangero
Prete, R. (1995): L'amiantifera di S. Vittore, Balangero, Torino. Rivista Mineralogica Italiana, 4/1995, 313-333.
Kosovo
 
  • District of Pristina (District of Prishtina)
    • Glavika
Buletini i Shkencave Gjeologjike 2012
New Caledonia
 
  • Northern Province
    • Houaïlou Commune
Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
    • Poum commune
Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
    • Poya North Commune
Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
  • Southern Province
    • Yaté Commune
Wells, Martin A.; Ramanaidou, Erick R.; Verrall, Michael; Tessarolo, Christian (2009): Mineralogy and crystal chemistry of "garnierites" in the Goro lateritic nickel deposit, New Caledonia. European Journal of Mineralogy 21, 467-483. ; Wells, M. A., Ramanaidou, E. R., Verrall, M., & Tessarolo, C. (2009). Mineralogy and crystal chemistry of “garnierites” in the Goro lateritic nickel deposit, New Caledonia. European Journal of Mineralogy, 21(2), 467-483.; Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
Poland
 
  • Lower Silesia (Dolnośląskie)
    • Ząbkowice District
American Mineralogist (1978), 63, 795-796 ; Clays and Clay minerals (1982), 30, 321
www.geo.uw.edu.pl/ZASOBY/SZKLARY/szklary.htm.
www.geo.uw.edu.pl/ZASOBY/SZKLARY/szklary.htm.
Russia
 
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Serov District
          • Kola massif
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
    • Southern Urals
      • Chelyabinsk Oblast'
        • Magnitogorsk
          • Sakhara District (Sakharinskii)
            • Sakhara massif
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
        • Ufaley District (Ufalei District)
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.; Berger, V.I., Singer, D.A., Bliss, J.D., and Moring, B.C., 2011, Ni-Co laterite deposits of the world; database and grade and tonnage models: U.S. Geological Survey Open-File Report 2011-1058.
      • Orenburgskaya Oblast'
        • Orsk
          • Khalilovskii District
            • Khabarninskii massif
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
        • Svetlyi
          • Buruktal District
            • Buruktal massif
Mikhailov, B.M. (2000): Lithology and Mineral Resources 35(4), 351-364.
South Korea
 
  • Gyeonggi-do (Kyonggi-do)
    • Gwancheon city (Kwancheon)
Song, Y., Moon, H. S., & Chon, H. T. (1995). New occurrence and characterization of Niserpentines in the Kwangcheon area, Korea. Clay Minerals, 30(3), 211-224.
Song, Y., Moon, H. S., & Chon, H. T. (1995). New occurrence and characterization of Niserpentines in the Kwangcheon area, Korea. Clay Minerals, 30(3), 211-224.
UK
 
  • England
    • Cornwall
      • Lizard Peninsula
        • St Keverne
Clay Minerals Bull. 32:241
USA
 
  • Hawaii
    • Kauai Co.
www.earthscape.org/r2/jg/jgvol108-508.html
Leveille, Richard J.; Fyfe, William S.; Longstaffe, Fred J. (2000): Unusual secondary Ca-Mg-carbonate-kerolite deposits in basaltic caves, Kauai, Hawaii. Journal of Geology 108, 613-621.
  • Maine
    • Knox Co.
      • Thomaston
King & Foord, 1994. Mineralogy of Maine, V.1.; King, V. and Foord, E. (1994) Mineralogy of Maine
      • Union
Rocks & Minerals (1955) 30:365-366
      • Warren
Morrill & Hinckley, 1959. Maine Mines & Minerals, Vol. 2
  • Massachusetts
    • Essex Co.
Yale Peabody Museum no. 3545
  • Nevada
    • Nye Co.
Clays and Clay Minerals, v. 30, p. 321-326
  • North Carolina
      • Cowee Valley
        • Ellijay District
          • Franklin
            • Corundum Hill
F.A Genth and W.C Kerr (1881) Minerals and Mineral Localites of North Carolina,Geologic Survey,North Carolina
Jan H.Bernard and Jaroslav Hyrsl ,2004,Minerals and their Localities, pg 322 G.W Brindley,David L.Bish, and Hsien-Ming Wan.,1977,The Nature of Kerolite, its relation to Talc and Stevensite:Mineral Mag.,41,443-452
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