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|Colour:||Usually white, may be ...|
|Name:||From being a water-rich alteration product of sodalite that had replaced nepheline.|
|A Mixture Of:||Diaspore, Gibbsite, Natrolite|
The type location is Dennis Hill, Litchfield, Maine, USA. Described by Clarke (1886), but later determined to be a mixture of natrolite, "epinatrolite", "hydrargillite" and gibbsite by Thugutt (1910). Probably dominantly natrolite (~80%). Formed by alteration of nepheline (Norway and Paraguay) or sodalite (Maine).
Compare also Spreustein.
Classification of Hydronephelite
|Explanation of status:||Re-studied by Thugutt, St. J., Ein Mikrochemischer Beweis der Zusammensetzen Natur des Hydronephelits nebst Bemerkungen uber die Abstammung der Spreustein, Neus Jahrbuch fur Mineralogie, Geologie und Palaontologie, v. 1, p. 25-36 + plate.|
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Physical Properties of Hydronephelite
|Colour:||Usually white, may be stained pink to red brown.|
|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 Hydronephelite
Clarke, F., 1886, The Minerals of Litchfield, Maine, American Journal of Science, third series, v 31, p. 262-272.
Dana (6th edition), p 609.
Troeger, W.E. (1952) Tabellen zur optischen Bestimmung der gesteinsbildenden Minerale. (Stuttgart)
Thugutt, S.J. (1932) Arch. Min. Soc. Sci. Varsovie (Warsaw) 8, !41-143. (in polish)
Stuetzel (1933) Neues Jahrbuch fuer Mineralogie, Geologie und Paleontologie, 1, 534. (in german) (abstract of Thugutt's 1932 paper)
Dunham, K.C. (1933) The American Mineralogist, 18, 374.
Internet Links for Hydronephelite
Localities for Hydronephelite
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.
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Locality Updated: Aggeneys, Namakwa District (Namaqualand), Northern Cape Province, South AfricaFrom Debbie Woolf, 17th Apr 2014 21:10:59