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Cleavelandite

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Formula:
Na(AlSi3O8)
Name:
Named in 1823 by Henry J. Brooke in honor of Parker Cleaveland [January 15, 1780 Rowley (Byfield), Massachusetts, USA - August 15, 1758, in Brunswick, Maine, USA], professor of geology and mineralogy at Bowdoin College in Maine 1805-1858. In 1816 Cleaveland wrote the first mineralogy textbook authored by a citizen of the USA. Despite the title page date, the textbook was actually released in January 1817. The textbook was noted for its unification of European schools of thought and was also popular in its second edition of 1822. Cleavelandite had been described earlier in 1817 by Johann Friedrich Ludwig Hausmann with the name "kieselspath". In 1815, Hans Peter Eggertz named granular and radiated albite, probably identical to cleavelandite of Brooke. In 1936, Harold Lattimore Alling defined cleavelandite as a triclinic mineral, suggesting a difference from true albite as well as "analbite". Fisher (1968) studied cleavelandite from Chesterfield, Massachusetts, USA, the type locality, but did not study type specimens, and proposed that true cleavelandite should be restricted to warped platy masses of mineral with lamellae parallel to (010) and "lack other well-defined crystal faces, and may be twinned on the albite law". This definition would not include most specimens called "cleavelandite", especially those cleavelandites grown into open cavities, although such "cleavelandite" is also known from the type locality. The current use of the varietal name generally includes cavity hosted crystal aggregates.
A variety of Albite

Platy albite, generally found in pegmatite.


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Chemical Properties of CleavelanditeHide

Formula:
Na(AlSi3O8)

Synonyms of CleavelanditeHide

Other Language Names for CleavelanditeHide

Simplified Chinese:叶钠长石
Traditional Chinese:葉鈉長石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Elbaite634 photos of Cleavelandite associated with Elbaite on mindat.org.
Quartz379 photos of Cleavelandite associated with Quartz on mindat.org.
Lepidolite303 photos of Cleavelandite associated with Lepidolite on mindat.org.
Muscovite184 photos of Cleavelandite associated with Muscovite on mindat.org.
Schorl150 photos of Cleavelandite associated with Schorl on mindat.org.
Topaz130 photos of Cleavelandite associated with Topaz on mindat.org.
Morganite122 photos of Cleavelandite associated with Morganite on mindat.org.
Tourmaline121 photos of Cleavelandite associated with Tourmaline on mindat.org.
Smoky Quartz119 photos of Cleavelandite associated with Smoky Quartz on mindat.org.
Microcline106 photos of Cleavelandite associated with Microcline on mindat.org.

Other InformationHide

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 CleavelanditeHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Dana's New Mineralogy, 8th ed., 1997, by Gaines, et.al.
Manual of Mineralogy after James D. Dana, 1977, by C. Klein & C.S. Hurlbut, Jr.
Maine Mineralogy, V.-I, 1994, by V. King & E. Foord.
Maine Mineralogy, V.-II, 2000, by V. King.

Internet Links for CleavelanditeHide

Localities for CleavelanditeHide

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 ListShow

Mineral and/or Locality  
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