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|Name:||Named for the discovery locality at Fukuoka, Fukuoka-cho, Ena-gun, Gifu Prefecture, Chubu Region, Honshu Island, Japan.|
Many references (and even the original description) call enalite a uranium-rich variety of thorite, but this is not possible, considering that phosphate dominates over silicate. It could be considered either a Th-Si-rich xenotime, or an independent member of the xenotime-thorite group, or perhaps a crystal composed of fine zoning with two different species.
Originally reported from Fukuoka, Fukuoka-cho, Ena-gun, Gifu Prefecture, Chubu Region, Honshu Island, Japan.
Classification of Enalite
|IMA status:||Valid - first described prior to 1959 (pre-IMA) - "Grandfathered" 1932|
|Strunz 8th edition ID:||7/A.14-|
7 : Phosphates, Arsenates, Vanadates
A : Waterfree phosphates [PO4]3- without unfamiliar anions, cations of small size: Li, Be, Al
14 : Xenotime-(Y) - Wakefieldite-(Ce) series
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Type Occurrence of Enalite
|Type Locality:||Fukuoka, Nakatsugawa City, Gifu Prefecture, Chubu Region, Honshu Island, Japan|
|General Appearance of Type Material:||Waterworn tetragonal crystals.|
|Year of Discovery:||1932|
|Geological Setting of type material:||Alluvium derived from granite pegmatites.|
|Associated Minerals at type locality:|
Physical Properties of Enalite
|Density (measured):||4.721 g/cm3|
Crystallography of Enalite
Chemical Properties of Enalite
|Essential elements:||O, P, Th|
|All elements listed in formula:||Al, H, O, P, Si, Th|
|Analytical Data:||REE elements not separated, so calculated apfu is approximate. Ignition loss assumed to be mostly (OH).|
MgO (0.00) CaO (0.73) MnO (0.00) PbO (0.95) Al2O3 (3.01) Fe2O3 (0.88) Ce2O3 (11.59) Nd2O3 etc. (12.57) ThO2 (28.96) UO2 (10.63) SnO2 (4.81) TiO2 (1.37) SiO2 (5.82) P2O5 (12.52) Ig. loss (5.59)
Relationship of Enalite to other Species
|Related Minerals - Strunz Grouping):|
Other Names for Enalite
|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 Enalite
Kimura, K., and Miyake, Y. (1932): Chemical investigation of the Oriental ores containing rare elements (Part 9). On enalite, a new variety of uranothorite, found in Naegi, Gifu Prefecture. Nihon Kagakukaisha (Journ. Chem. Soc. Japan) 53, 93-100.
Internet Links for Enalite
Localities for Enalite
(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: Ciapa Liscia, Piacenza Province, Emilia-Romagna, ItalyFrom Bruno Marello, 10th Dec 2013 10:45:58