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|Colour:||White, yellowish, pink, ...||Lustre:||Vitreous|
|Hardness:||5½ - 6|
|A Mixture Of:||Amblygonite, Lacroixite, Wardite|
Originally reported from Eight Mile Park, Eight Mile Park pegmatite District, Fremont Co., Colorado, USA.
Classification of Natromontebrasite
|IMA status:||Discredited 2007|
|Explanation of status:||Species and name natromontebrasite are discredited because natromontebrasite is a mixture of OH-rich amblygonite with lacroixite and subordinate wardite (IMA No. 05-E ).|
|Dana 8th edition ID:||18.104.22.168|
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
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Physical Properties of Natromontebrasite
|Colour:||White, yellowish, pink, greenish, etc.|
|Hardness (Mohs):||5½ - 6|
Other Names for Natromontebrasite
|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 Natromontebrasite
Schaller (1911) American Journal of Science: 31: 48 (as Natramblygonite).
Gonnard (1913) Bulletin de la Société française de Minéralogie: 36: 120.
Schaller (1914) Journal of the Washington Academy of Science: 4: 354 (as Fremontite).
Schaller (1916) U.S. geological Survey Bull. 610: 141 (as Fremontite).
Mineralogical Magazine (1916): 17: 350 (as Fremontite).
American Mineralogist (1951): 36: 823-827.
Palache, C., Berman, H., & Frondel, C. (1951), The System of Mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, Volume II. John Wiley and Sons, Inc., New York, 7th edition, revised and enlarged, 1124 pp.: 823.
Fransolet, A.-M., Fontan, F., de Parseval, Ph. (2007): Natromontebrasite, a discredited mineral species. Canadian Mineralogist, 45, 391-396.
Internet Links for Natromontebrasite
Localities for Natromontebrasite
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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