Kerolite (original) (raw)
A material that is NOT an approved mineral species
About KeroliteHide
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Formula:
(Mg,Ni)3Si4O10(OH)2 · nH2O (n ~ 1)
Colour:
white, brown, green, colorless
Crystal System:
Monoclinic
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.
Unique IdentifiersHide
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Long-form identifier:
mindat:1:1:7133:4
27613f17-1c23-4c2f-80dc-5d1682b57fdf
IMA Classification of KeroliteHide
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'Grandfathered' (first described prior to 1959)
Mineral SymbolsHide
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As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Please only use the official IMA–CNMNC symbol. Older variants are listed for historical use only.
| Symbol | Source | Reference |
|---|---|---|
| Krl | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
| Krl | Warr (2020) | Warr, L.N. (2020) Recommended abbreviations for the names of clay minerals and associated phases. Clay Minerals, 55, 261–264 doi:10.1180/clm.2020.30 |
Physical Properties of KeroliteHide
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Colour:
white, brown, green, colorless
Chemistry of KeroliteHide
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Mindat Formula:
(Mg,Ni)3Si4O10(OH)2 · nH2O (n ~ 1)
Ni not essential
Crystallography of KeroliteHide
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Crystal System:
Monoclinic
Cell Parameters:
b = 9.14 Å
Morphology:
Aggregates of submicron-scale platelets.
Comment:
Diffraction peaks are few and broad; d(001) = 9.6 Å
Synonyms of KeroliteHide
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Other Language Names for KeroliteHide
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Common AssociatesHide
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Associated Minerals Based on Photo Data:
Other InformationHide
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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).
Notes:
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.
Internet Links for KeroliteHide
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References for KeroliteHide
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Localities for KeroliteHide
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This 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.
Locality ListHide
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- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. 
- Good crystals or important locality for species. 
- World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).
All localities listed without proper references should be considered as questionable.