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Uranmicrolite (of Hogarth 1977)

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Yellowish-brown, ...
Waxy, Greasy
Named as a supposed uranium-bearing variety of microlite.
A variety of Microlite Group

No samples described as uranmicrolite (“djalmaite” of Guimarães 1939) (e.g., Baldwin 1989, Rub et al. 1998, Tindle & Breaks 1998, Novák & Černý 1998, Zhang et al. 2004, Breiter et al. 2007, van Lichtervelde et al. 2007, Uher et al. 2007) are rich enough in U to warrant a status as a separate species.

Classification of Uranmicrolite (of Hogarth 1977)


18 : Niobates and Tantalates
3 : Niobates and tantalates containing U but not rare earths

Physical Properties of Uranmicrolite (of Hogarth 1977)

Waxy, Greasy
Yellowish-brown, greenish-brown, brownish-black
Hardness (Mohs):

Optical Data of Uranmicrolite (of Hogarth 1977)


Crystallography of Uranmicrolite (of Hogarth 1977)

Crystal System:

First Recorded Occurrence of Uranmicrolite (of Hogarth 1977)

Relationship of Uranmicrolite (of Hogarth 1977) to other Species

18.3.3Betafite (of Hogarth 1977)A2-mB2X6-wY1-n
18.3.4Plumbobetafite (of Hogarth 1977)A2-mB2X6-wY1-n

Other Names for Uranmicrolite (of Hogarth 1977)

Other Information

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 Uranmicrolite (of Hogarth 1977)

Reference List:
Annales Acad. Brasil. Ciencias (1939), 11, 347.

American Mineralogist (1977): 62: 403-410.

Internet Links for Uranmicrolite (of Hogarth 1977) URL:
Please feel free to link to this page.

Localities for Uranmicrolite (of Hogarth 1977)

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
  • Salta
    • La Poma department
      • Nevados de Palermo
        • El Quemado district
Galliski et al. (2001) Bismutotantalite from northwestern Argentina: description and crystal structure. Canadian Mineralogist Vol. 39, pp. 103-110.
  • South Australia
    • Flinders Ranges
      • North Flinders Ranges
        • Mt Babbage area (Inlier)
PA Wulser collection
  • Victoria
    • East Gippsland Shire
      • Omeo
        • Mt Wills Mining District
          • Glen Wills
Personally collected by Ryan Eagle in 2009; Eagle, R. M., Birch, W. D., & McKnight, S. (2015). Phosphate minerals in granitic pegmatites from the Mount Wills District, north-eastern Victoria. Proceedings of the Royal Society of Victoria, 127(2), 55-68.
  • Carinthia
    • Millstatt lake ridge
      • Spittal
        • Lieser ravine
Walter, F. (1998): Exkursion E4 am 27.9.1998 - MinPet 98 (Pörtschach am Wörthersee/Kärnten) - Die Pegmatite des Millstätter See-Rückens. Mitt. Österr. Mineral. Ges. 143, 437-450. []
        • Wolfsberg
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
  • Santa Cruz Department
    • Ñuflo de Chavez Province
      • San Agustín
Alfredo Petrov collection
Brazil (FRL)
  • Minas Gerais
    • Conceição do Mato Dentro
      • São José de Brejaúba
Guimar˜aes, C.P. (1941) Djalmaite, a new radioactive mineral. Amer. Mineral., 26, 343–346.
    • Galiléia
Luis Menezes
    • São João del Rei pegmatite province
      • Nazareno
Fernando R.M. Pires and A. Raphael Cabral (1998) The Volta Grande pegmatites, Minas Gerais, Brazil: an example of rare-element granitic pegmatites exceptionally enriched in lithium and rubidium: Discussion. The Canadian Mineralogist, 36, 1157-1158.
  • Rio Grande do Norte
    • Borborema mineral province
      • Parelhas
Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Mineralium Deposita 43, 207-228.; Beurlen, H., Soares, D. R., Thomas, R., Prado-Borges, L. E., & Castro, C. D. (2005). Mineral chemistry of tantalate species new in the Borborema Pegmatitic Province, Northeast Brazil. Anais da Academia Brasileira de Ciências, 77(1), 169-182.
[MinRec 29:196]
Beurlen, H., Da Silva, M.R.R., Thomas, R., Soares, D.R., and Olivier, P. (2008): Mineralium Deposita 43, 207-228.
  • Northwest Territories
    • Tungsten
The Canadian Mineralogist Vol. 41, pp. 139-160 (2003)
  • Ontario
    • Kenora District
      • Pakeagama Lake Area
Andrew G. Tindle, Fred W. Breaks and Julie B. Selway (2002) Tourmaline in petalite-subtype granitic pegmatites; evidence of fractionation and contamination from the Paleagama Lake and Separation Lake areas of northwestern Ontario, Canada. The Canadian Mineralogist 40:753-78
      • Paterson Lake Area
Tindle, A.G. & Breaks, F.W. (1998) Oxide minerals of the Separation Rapids rare-element granitic pegmatite group, northwestern Ontario. Canadian Mineralogist, 36, 609-635.
Tindle, A.G., Breaks, F.W., and Selway, J.B. (2002) Tourmaline in petalite-subtype gramitic pegmatites: evidence of fractionation and contamination from Pakeagama Lake and Separation Lake areas of northwestern Ontario, Canada. Canadian Mineralogist, 40, 753-788.
  • Jiangxi Province
    • Ji'an Prefecture
      • Suichuan Co.
Yunhuai Lin and Shiyang Chen (1985): Geology and Prospecting 21(3), 23-31
  • Xinjiang Autonomous Region
    • Yili Hasake Autonomous Prefecture (Ili Kazakh Autonomous Prefecture)
      • Aletai Prefecture (Altay Prefecture)
        • Fuyun Co. (Koktokay Co.)
          • Koktokay pegmatite field (Keketuohai pegmatite field)
            • Altay Mine
Tianren Zou, Xiangchen Zhang, Fuyi Jia, Rucong Wang, Huizhi Cao, and Boqing Wu (1986): Mineral Deposits 5(4), 34-48
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Karlovy Vary Region
      • Lázně Kynžvart (Bad Königswart)
Černý, P., Veselovský, F.: Pegmatit Bílý kámen (Weisser Stein) u Kynžvartu. Minerál, 2000, roč. 8, č. 1, s. 10-16.
  • Moravia (Mähren; Maehren)
    • Moravia-Silesia Region
      • Bruntál
        • Praděd (Altvater)
Pauliš P., Kopecký S., Černý P. 2007: Uranové minerály České Republiky a jejich naleziště. 1. část. (Kutna Hora, issue 1)
    • Olomouc Region
      • Šumperk (Mährisch Schönberg)
        • Maršíkov (Marchendorf)
No reference listed
Novák, M., Černý, P.: Přehled minerálů niobu a tantalu z granitických pegmatitů České republiky. Bulletin mineralogicko-petrografického oddělení Národního muzea v Praze, 1999, roč. 7, s. 117-131.; Novák, M.: Maršíkov - Scheibengraben. In Exkurzní průvodce po mineralogických lokalitách na Sobotínsku. Univerzita Palackého v Olomouci, 2002, Olomouc, s. 38-41.
  • Oromia Region (Oromiya Region)
    • Kenticha pegmatite field
Küster, D., Romer, R. L., Tolessa, D., Zerihun, D., Bheemalingeswara, K., Melcher, F., & Oberthür, T. (2009). The Kenticha rare-element pegmatite, Ethiopia: internal differentiation, U–Pb age and Ta mineralization. Mineralium Deposita, 44(7), 723-750.
  • Western and Inner Finland Region
    • Orivesi
      • Eräjärvi area
Sandström, F. & Lahti, S.I. (2009): Viitaniemipegmatiten i Eräjärvi, Orivesi, Finland. Litiofilen 26 (1): 11-38
  • Lombardy
    • Sondrio Province
      • Valchiavenna
        • Chiavenna
AA. VV., 1996. Collezionare minerali. Hobby & Work.
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Ossola Valley
        • Trontano
          • Cosasca
Boscardin, M.; Mattioli, G. & Pierini, C. (1982): Mikrolith und Columbite. LAPIS 7 (3), 17-19
        • Vigezzo Valley
          • Craveggia
            • Rio Vasca
AA. VV., 1996. Collezionare minerali. Hobby & Work.
          • Druogno
            • Orcesco
AA. VV., 1996. Collezionare minerali. Hobby & Work.
          • Trontano
            • Pizzo Marcio
Appiani, R., Cini, V., Gentile, P., Mattioli, V., Preite, D., Vignola, P. (1995): Val Vigezzo - I minerali delle albititi. Ed. Linea Due S.r.l., Marnate (Varese), 90 pp.
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): MInerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" Alba, Ed., Alba (Cuneo) 607 pp.
  • Tuscany
    • Livorno Province
      • Elba Island
        • Campo nell'Elba
Orlandi et al., 1990. Nb-Ta oxides from Elba Island pegmatites. Atti Soc. Tosc. Sci. Nat., Mem., Serie A, 97: 161-173
P. Orlandi, M. Pasero, N. Perchiazzi (1990) - Nb-Ta oxides from Elba Island pegmatites. - Atti Soc. Tosc. Sc. Nat., Mem. serie A, v.97: 161-173.
Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
  • Honshu Island
    • Kanto Region
      • Ibaraki Prefecture
        • Hitachiohta City
Matsubara et al (1995) Mineralogical Journal, 17, 338-345
  • Eastern Kazakhstan Province (Shyghys Qazaqstan Oblysy; Vostochno-Kazakhstanskaya Oblast')
    • Kalba Range
      • Irtysh River
Pavel M. Kartashov data
  • Antananarivo Province
    • Vakinankaratra Region
      • Sahatany Pegmatite Field (Mt Ibity area)
        • Manandona Valley
Pezzotta, F. (1999): Madagaskar. Das Paradies der Mineralien und Edelsteine. Extra Lapis nr 17, pp 53-54 (german edition)
  • Zambezia Province
    • Alto Ligonha District
Mineralogical Record Vol. 31, p. 489.
  • Braga District
    • Vieira do Minho
      • Anjos
        • Muro Alto Mine
Dias, P. A., Pereira, B., Leal Gomes, C., & Guimarães, F. (2009). Structure and Mineralogy of the Muro Alto Granitic Pegmatite (Vieira Do Minho-Portugal) – Peculiar Assemblages of High-F Hydro-thermal Evolution. Estudos Geológicos, 19(2), 105.
Dias, P. A., Pereira, B., Leal Gomes, C., & Guimarães, F. (2009). Structure and Mineralogy of the Muro Alto Granitic Pegmatite (Vieira Do Minho-Portugal) – Peculiar Assemblages of High-F Hydro-thermal Evolution. Estudos Geológicos, 19(2), 105.
  • Urals Region
    • Middle Urals
      • Sverdlovskaya Oblast'
        • Rezh District
          • Lipovka pegmatite field
Lapis 28(10), 60 (2003); Igor.V. Pekov, Lyudmila R. Memetova (2008) Minerals of the Lipovka Granite Pegmatites, Central Urals, Russia. Mineralogical Almanac 13:6-45
  • Western Province
    • Gatumba District
Bertossa, A., 1967. Inventaire des minéraux du Rwanda. Bulletin du Service Géologique de Rwanda 4, 25-45.; Daltry, V.D.C. and O. von Knorring (1998) Type-Mineralogy of Rwanda with Particular Reference to the Buranga Pegmatite. Geologica Belgica 1:1-9
  • Banská Bystrica Region
    • Banská Bystrica Co.
      • Brusno
Uher, P. ,Černý, P., 1998 : Vzácnoprvková mineralizácia v granitových pegmatitoch Nízkych Tatier. Mineralia Slovaca, 30, 2,93 – 94
  • Bratislava Region
    • Pezinok Co.
      • Pezinok
        • Slnečné Valley
Uher P., Žitňan P., Ozdín D., 2007: Pegmatitic Nb-Ta oxide minerals in alluvial placers from Limbach, Bratislava Massif, Western Carpathians, Slovakia: compositional variations and evolutionary trend. Journal of Geosciences, 52, 1-2, 133-141.
  • Košice Region
    • Rožňava Co.
Koděra, M. et al., 1986 a 1990 : Topografická mineralógia Slovenska, diel 1- 3, Veda – Vydavateľstvo SAV, Bratislava, 1990, 1 – 1590k
South Africa
  • KwaZulu-Natal Province
    • Uthungulu District
Minerals of South Africa
  • Södermanland
    • Haninge
      • Utö
Otter, B. (2004): Utö-mineralriket. Berg & Mineral. 14 (nr 44), 28-36
  • Alabama
    • Coosa Co.
      • Rockford District
Canadian Mineralogist Vol. 27, pp. 93-105 (1989)
  • California
    • San Diego Co.
      • Mesa Grande District
        • Gem Hill
Fisher, J., E. E. Foord, and G. A. Bricker, 1999. The geology, mineralogy, and history of the Himalaya mine, Mesa Grande, San Diego County, California. California Geology 52(1):3-18.
      • Ramona District
        • Ramona
Foord, Eugene E. et al (1989), Mineralogy and Paragenesis of the Little Three Mine Pegmatites, Ramona District, San Diego County, California. Mineralogical Record, 20(2): p. 123.
  • Connecticut
    • Hartford Co.
      • Glastonbury
        • South Glastonbury
    • Litchfield Co.
      • Watertown
        • State route 8
Bill Barret Coll. Specimen, Minerals identified by Jeremy Zolan
    • Middlesex Co.
      • East Hampton (Chatham)
Harold Moritz collection. Former Bruce Jarnot collection.
  • North Carolina
    • Mitchell Co.
      • Spruce Pine District
        • Spruce Pine
          • Greasy Creek Township
Wilson,W.F and McKenzie,B.J.,1985,Some Mineral collecting sites in North Carolina;Rocks and Minerals,Vol.60,pg.84-93
Warner,Richard.,Poterala,Stephen and Fleisher,Chris (2008) A Note On Uranium Minerals From The Spruce Pine Area,North Carolina: Carolina Geological Society,2008,Annual Meeting,Spruce Pine Mining District
  • Wisconsin
    • Dodge Co.
Buchholz, T., A. Falster, A. & W. Simmons (2007) Waylandite, bismuth and associated minerals from the Waterloo Quarry, southern Wisconsin: 34th Rochester Mineralogical Symposium Abstracts: 7-8.
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