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Enalite

A valid IMA mineral species - grandfathered - questionable
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Formula:
(Th,REE,Al) [(PO4),(SiO4),(OH)]
Colour:
orange-yellow
Lustre:
Resinous
Specific Gravity:
4.721
Crystal System:
Tetragonal
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.


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Unique IdentifiersHide

Mindat ID:
27201
Long-form identifier:
mindat:1:1:27201:0
GUID
(UUID V4):
f05b8549-18d2-4b85-9c16-362f08ec7c17

IMA Classification of EnaliteHide

Classification of EnaliteHide

9.AH.70

9 : SILICATES (Germanates)
A : Nesosilicates
H : Nesosilicates with CO3, SO4, PO4, etc.

Physical Properties of EnaliteHide

Resinous
Transparency:
Translucent
Colour:
orange-yellow
Density:
4.721 g/cm3 (Measured)    

Chemistry of EnaliteHide

Mindat Formula:
(Th,REE,Al) [(PO4),(SiO4),(OH)]

Crystallography of EnaliteHide

Crystal System:
Tetragonal
Comment:
No data

Type Occurrence of EnaliteHide

General Appearance of Type Material:
Waterworn tetragonal crystals.
Geological Setting of Type Material:
Alluvium derived from granite pegmatites.
Associated Minerals at Type Locality:
Reference:
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.

Other Language Names for EnaliteHide

Japanese:恵那石

Related Minerals - Strunz-mindat GroupingHide

9.AH.Fluorbritholite-(Nd)Ca2Nd3(SiO4)3FHex. 6/m : P63/m
9.AH.05Iimoriite-(Y)Y2[SiO4][CO3]Tric. 1 : P1
9.AH.10Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
9.AH.10Tundrite-(Nd)Na2(Nd,Ce)2Ti(SiO4)(CO3)2O2
9.AH.15SpurriteCa5(SiO4)2(CO3)Mon. 2/m : P21/b
9.AH.15GaluskiniteCa7(SiO4)3(CO3) Mon. 2/m : P21/b
9.AH.20TernesiteCa5(SiO4)2(SO4)Orth. mmm (2/m 2/m 2/m) : Pnma
9.AH.20SilicocarnotiteCa5[(SiO4)(PO4)](PO4)Orth. mmm (2/m 2/m 2/m) : Pnma
9.AH.25Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
9.AH.25Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m
9.AH.25ChlorellestaditeCa5(SiO4)1.5(SO4)1.5ClHex. 6/m : P63/m
9.AH.25Fluorbritholite-(Ce)(Ce,Ca)5(SiO4)3FHex. 6/m : P63/m
9.AH.25FluorellestaditeCa5(SiO4)1.5(SO4)1.5FHex. 6/m : P63/m
9.AH.25HydroxylellestaditeCa5(SiO4)1.5(SO4)1.5(OH)Hex. 6/mmm (6/m 2/m 2/m) : P63/mcm
9.AH.25MattheddleitePb5(SiO4)1.5(SO4)1.5(Cl,OH)Hex. 6/m : P63/m
9.AH.25Tritomite-(Ce)Ce5(SiO4,BO4)3(OH,O)
9.AH.25Tritomite-(Y)Y5(SiO4,BO4)3(O,OH,F)
9.AH.25Fluorcalciobritholite(Ca,REE)5(SiO4,PO4)3FHex. 6/m : P63/m
9.AH.25Fluorbritholite-(Y)(Y,Ca)5(SiO4)3FHex. 6/m : P63/m
9.AH.25Britholite-(La)Ca2(La,Ce,Ca)3(SiO4,PO4)3(OH,F)
9.AH.25Calciobritholite(Ca,Y)5(SiO4,PO4)3(OH)
9.AH.35NabimusaiteKCa12(SiO4)4(SO4)2O2FTrig. 3m (3 2/m) : R3m
9.AH.35DargaiteBaCa12(SiO4)4(SO4)2O3Trig. 3m : R3m
9.AH.40ZadoviteBaCa6[(SiO4)(PO4)](PO4)2FTrig. 3m : R3m
9.AH.40GazeeviteBaCa6(SiO4)2(SO4)2OTrig. 3m (3 2/m) : R3m
9.AH.40StracheriteBaCa6(SiO4)2[(PO4)(CO3)]2FTrig. 3m (3 2/m) : R3m
9.AH.45FlamiteCa8-x(Na,K)x(SiO4)4-x(PO4)xOrth. mm2
9.AH.50ByzantieviteBa5(Ca,REE,Y)22(Ti,Nb)18(SiO4)4[(PO4),(SiO4)]4(BO3)9O22[(OH),F]43(H2O)1.5Trig. 3 : R3
9.AH.55Greenwoodite(Ba,V3+O)2V3+9(Fe3+,Fe2+)2Si2O22Trig. 3m (3 2/m) : P3m1
9.AH.60Kihlmanite-(Ce)Ce2TiO2(SiO4)(HCO3)2(H2O)Tric. 1 : P1
9.AH.65TsangpoiteCa5(PO4)2(SiO4)Hex.

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.

Internet Links for EnaliteHide

References for EnaliteHide

Localities for EnaliteHide

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 ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.
Japan (TL)
 
  • Gifu Prefecture
    • Nakatsugawa City
Kimura et al. (1932)
      • Hirukawa
Yamada (2004)
 
Mineral and/or Locality  
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