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About Tritomite-(Y)Hide

Also given as (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13.
Dark green-black, red-brown, nearly black
Vitreous, Resinous
3½ - 6½
For its-relation to tritomite-(Ce) and yttrium in the composition. The name tritomite is derived from the Greek τρί (tri), threefold and τομος (tomos), a cut, in allusion to the triangular and pseudo-tetrahedral crystal outline.

The mineral was described as a new species by Frondel (1961) and named spencite after Hugh S. Spence, a Canadian mineralogist who first found the mineral in 1934. The name was changed to tritomite-(Y) and spencite became a synonym, owing to the implementation of the new nomenclature for rare-earth minerals (Levinson 1966, Nickel & Mandarino 1987). Spencite was the Y-analogue of the tritomite-(Ce), and the tritomite name had priority (Horváth 2003).
A mineral in the Britholite Group of the Apatite Supergroup (Pasero et al. 2010). A borosilicate whith REEs strongly prevalent over Ca in the M sites for stoichometric reason (Pasero et al. 2010). The Y-analogue of tritomite-(Ce).

Classification of Tritomite-(Y)Hide


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

54 : NESOSILICATES Borosilicates and Some Beryllosilicates
2 : Borosilicates and Some Beryllosilicates with B in [4] coordination

17 : Silicates Containing other Anions
5 : Borosilicates

Physical Properties of Tritomite-(Y)Hide

Vitreous, Resinous
Dark green-black, red-brown, nearly black
3½ - 6½ on Mohs scale

Chemical Properties of Tritomite-(Y)Hide


Also given as (Y,Ca,La,Fe)5(Si,B,Al)3(O,OH,F)13.

Crystallography of Tritomite-(Y)Hide

Anhedral grains and irregular masses

Type Occurrence of Tritomite-(Y)Hide

General Appearance of Type Material:
As anhedral grains and irregular masses
up to 2,5 cm in size
Geological Setting of Type Material:
In a granite pegmatite
Associated Minerals at Type Locality:

Synonyms of Tritomite-(Y)Hide

Other Language Names for Tritomite-(Y)Hide

Varieties of Tritomite-(Y)Hide

AlumospenciteAluminian Spencite

Relationship of Tritomite-(Y) to other SpeciesHide

Other Members of this group:
Britholite-(Ce)(Ce,Ca)5(SiO4)3OHHex. 6/m : P63/m
Britholite-(Y)(Y,Ca)5(SiO4)3OHHex. 6/m : P63/m
Fluorbritholite-(Ce)(Ce,Ca)5(SiO4)3FHex. 6/m : P63/m
Fluorbritholite-(Y)(Y,Ca)5(SiO4)3FHex. 6/m : P63/m
Fluorcalciobritholite(Ca,REE)5(SiO4,PO4)3FHex. 6/m : P63/m

Common AssociatesHide

Associated Minerals Based on Photo Data:
Zircon3 photos of Tritomite-(Y) associated with Zircon on
Allanite2 photos of Tritomite-(Y) associated with Allanite on
Magnetite1 photo of Tritomite-(Y) associated with Magnetite on
Cyrtolite1 photo of Tritomite-(Y) associated with Cyrtolite on

Related Minerals - Nickel-Strunz GroupingHide

9.AH.10Tundrite-(Ce)Na2Ce2Ti(SiO4)(CO3)2O2Tric. 1 : P1
9.AH.20TernesiteCa5(SiO4)2(SO4)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.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.25Fluorcalciobritholite(Ca,REE)5(SiO4,PO4)3FHex. 6/m : P63/m
9.AH.25Fluorbritholite-(Y)(Y,Ca)5(SiO4)3FHex. 6/m : P63/m

Related Minerals - Dana Grouping (8th Ed.)Hide,BO4)3(OH,O),Ca)5(SiO4,BO4)3(OH,0)Hex.,REE,Ca,Na,Mn)15Fe2+(P,Si)Si6B3O34F14Trig. 3m : R3m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

17.5.3SearlesiteNa(H2BSi2O7)Mon. 2 : P21
17.5.5ElbaiteNa(Li1.5Al1.5)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.8PoudretteiteKNa2B3Si12O30Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
17.5.9LiddicoatiteCa(Li2Al)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.10DatoliteCaB(SiO4)(OH)Mon. 2/m : P21/b
17.5.11DanburiteCaB2Si2O8Orth. mmm (2/m 2/m 2/m)
17.5.12HowliteCa2B5SiO9(OH)5Mon. 2/m : P21/b
17.5.13BakeriteCa4(H5B5Si3O20)Mon. 2/m : P21/b
17.5.14OyeliteCa10Si8B2O29 · 12.5H2OOrth.
17.5.15KornerupineMg3Al6(Si,Al,B)5O21(OH)Orth. mmm (2/m 2/m 2/m)
17.5.16HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
17.5.17SerendibiteCa4[Mg6Al6]O4[Si6B3Al3O36]Tric. 1 : P1
17.5.24Cappelenite-(Y)Ba(Y,Ce)6Si3B6O24F2Trig. 3 : P3
17.5.25Dumortierite(Al,Fe3+)7(SiO4)3(BO3)O3Orth. mmm (2/m 2/m 2/m)
17.5.26Holtite(Ta0.60.4)Al6BSi3O18(O,OH)2.25Orth. mmm (2/m 2/m 2/m) : Pnma
17.5.27DraviteNa(Mg3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.28 FerridraviteNaFe3+3(Mg2Fe3+4)(Si6O18)(BO3)3(OH)3O
17.5.30Uvite SeriesCa(Mg3)MgAl5(Si6O18)(BO3)3(OH)3(F/OH)Trig. 3m : R3m
17.5.32TienshaniteKNa3Na6Ca2Ba6Mn6(Ti4+,Nb)6B12Si36O114(O,OH,F)11Hex. 6/m : P6/m
17.5.34TaramelliteBa4(Fe3+,Ti,Fe2+,Mg)4(B2Si8O27)O2ClxOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.36NagashimaliteBa4(V,Ti)4B2Si8O27(O,OH)2ClOrth. mmm (2/m 2/m 2/m) : Pmmn
17.5.40Axinite-(Mn)Ca2Mn2+Al2BSi4O15(OH)Tric. 1 : P1
17.5.44SchorlNa(Fe2+3)Al6(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.45Fluor-buergeriteNa(Fe3+3)Al6(Si6O18)(BO3)3O3FTrig. 3m : R3m
17.5.46FeruviteCa(Fe2+)3MgAl5(Si6O18)(BO3)3(OH)3(OH)Trig. 3m : R3m
17.5.47Axinite-(Fe)Ca2Fe2+Al2BSi4O15OHTric. 1 : P1
17.5.48HomiliteCa2(Fe2+,Mg)B2Si2O10Mon. 2/m : P21/b
17.5.49Grandidierite(Mg,Fe2+)(Al,Fe3+)3(SiO4)(BO3)O2Orth. mmm (2/m 2/m 2/m)
17.5.50Hyalotekite(Pb,Ba,K)4(Ca,Y)2(B,Be)2(Si,B)2Si8O28(F,Cl)Tric. 1 : P1
17.5.51Hellandite-(Y)(Ca,REE)4Y2Al◻2(B4Si4O22) (OH)2Mon.

Other InformationHide

Decompose by hydrochloric acid with separation of gelatinous
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 Tritomite-(Y)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Frondel, C. (1961) Two yttrium minerals: spencite and rowlandite. Canadian Mineralogist: 6: 576-581. Abstracted in American Mineralogist (1961): 46: 1204.
Jaffe, H.W., Molinsky, V.J. (1962) Spencite, the yttrium analogue of tritomite from Sussex Co., New Jersey. American Mineralogist: 47: 9-25.
Joensuu, O.I., Ingamells, C.O. (1966) Additional data on the composition of spencite. Canadian Mineralogist: 8: 647-649.
Levinson, A.A. (1966) A system of nomenclature for rare-earth minerals. American Mineralogist: 51: 152-158.
Nickel, E.H., Mandarino, J.A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names, and guidelines on mineral nomenclature. Canadian Mineralogist: 25: 353-377.
Pasero, M., Kampf, A.R., Ferraris, C., Pekov, I.V., Rakovan, J., White, T.J. (2010) Nomenclature of the apatite supergroup minerals. European Journal of Mineralogy: 22: 163-179.

Internet Links for Tritomite-(Y)Hide

Localities for Tritomite-(Y)Hide

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 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 (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
  • Pará
    • Carajás mineral province
      • Canaã dos Carajás
Grainger, C.J., Groves, D.I., Tallarico, F.H.B., and Fletcher, I.R. (2008): Ore Geology Reviews 33, 451-489.
  • Ontario
    • Haliburton Co.
      • Cardiff Township
D. D. Hogarth, H. R. Steacy, E. I. Semenov, E. G. Proshchenko, M. E. Kazakova and Z. T. Kataeva (1973) New occurrence and data for spencite. The Canadian Mineralogist 12:66-71
FRONDEL, C. (1961): Two yttrium minerals: spencite and rowlandite. Canadian Mineralogist 6, 576-581. JAFFE, H.W. & MOLINSKY, V.J. (1962): Spencite, the yttrium analogue of tritomite from Sussex Co., New Jersey. American Mineralogist 47, 9-25. JOENSUU, O.I. & INGAMELLS, C.O. (1966): Additional data on the composition of spencite. Canadian Mineralogist 8, 647-649.
    • Hastings Co.
      • Faraday Township
Rocks & Min.:59:206 & 210.; D. D. Hogarth, H. R. Steacy, E. I. Semenov, E. G. Proshchenko, M. E. Kazakova and Z. T. Kataeva (1973) New occurrence and data for spencite. The Canadian Mineralogist 12:66-71; Masson, S. L., & Gordon, J. B. (1981). Radioactive mineral deposits of the Pembroke-Renfrew area. Ministry of Natural Resources.Survey, Mineral Deposits Circular 23, 155
  • Banská Bystrica Region
    • Lučenec Co.
Huraiová M., Konečný P., 2006: U-Pb-Th datovanie a chemické zloženie monazitu v xenolitoch syenitu a pincinitu z vrchno miocénneho maaru pri obci Pinciná (Lučenecká kotlina). Min.Slovaca, Bratislava, 38, 141-150.
  • New Jersey
    • Sussex Co.
      • Byram Township
        • Cranberry Lake
A Quest for New Jersey Minerals, Robert Speiser(1978).
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