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|Name:||Named for Professor Jean Protas (1932– ), French mineralogist, University of Nancy, Nancy, France, who first synthesized the compound, and for his work with uranium oxide minerals.|
This page provides mineralogical data about Protasite.
Classification of Protasite
|Strunz 8th edition ID:||4/H.03-30|
|Nickel-Strunz 10th (pending) edition ID:||4.GB.10|
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
G : Uranyl Hydroxides
B : With additional cations (K, Ca, Ba, Pb, etc.); with mainly UO2(O,OH)5 pentagonal polyhedra
|Dana 8th edition ID:||22.214.171.124|
5 : OXIDES CONTAINING URANIUM OR THORIUM
5 : AX3O10·xH2O
|Hey's CIM Ref.:||7.16.14|
7 : Oxides and Hydroxides
16 : Oxides of U
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Type Occurrence of Protasite
|Type Locality:||Shinkolobwe Mine (Kasolo Mine), Shinkolobwe, Katanga Copper Crescent, Katanga (Shaba), Democratic Republic of Congo (Zaïre)|
|Year of Discovery:||1986|
Physical Properties of Protasite
Crystallography of Protasite
|Cell Parameters:||a = 12.29Å, b = 7.22Å, c = 6.95Å|
β = 90.4°
|Ratio:||a:b:c = 1.702 : 1 : 0.963|
|Unit Cell Volume:||V 616.68 Å³ (Calculated from Unit Cell)|
Optical Data of Protasite
|Dispersion:||r > v|
Chemical Properties of Protasite
|Simplified for copy/paste:||Ba(UO2)3O3(OH)2·3H2O|
|Essential elements:||Ba, H, O, U|
|All elements listed in formula:||Ba, H, O, U|
Relationship of Protasite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
|Related Minerals - Hey's Index Grouping:|
Other Names for Protasite
|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 Protasite
Mineralogical Magazine (1986): 50: 125-128.
Pagoaga, M.K., Appleman, D.E., and Stewart, J.M. (1987) Crystal structures and crystal chemistry of the uranyl oxide hydrates becquerelite, billietite, and protasite. American Mineralogist: 72: 1230-1238.
Burns, P.C. and Hanchar, J.M. (1999) The structure of masuyite, Pb[(UO2)3O3(OH)2](H2O)3, and its relationship to protasite. Canadian Mineralogist: 37: 1483-1491.
Burns, P.C. (2005) U 6+ minerals and inorganic compounds: insights into an expanded structural hierarchy of crystal structures. Canadian Mineralogist: 43: 1839-1894.
Internet Links for Protasite
Localities for Protasite
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.