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(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O
Crystal System:
The mineral is named after the indigenous Algonquin Indian name of the settlement, Hochelaga, situated on the present site of the city of Montréal when the first Europeans arrived.
Probably the lower-hydrate counterpart of 'Unnamed MSH UK56'.

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Classification of HochelagaiteHide


4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
M : Hydroxides with H2O +- (OH); unclassified

6 : (AB)6O11·nH2O

18 : Niobates and Tantalates
1 : Niobates and tantalates containing neither rare earths nor U

Physical Properties of HochelagaiteHide


Optical Data of HochelagaiteHide

Biaxial (+)
RI values:
nα = 1.720 nβ = 1.810 nγ = 1.820
Measured: 35° , Calculated: 34°
Max Birefringence:
δ = 0.100
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
r < v moderate

Chemical Properties of HochelagaiteHide

(Ca,Na,Sr)(Nb,Ti,Si,Al)4O11 · 8H2O
IMA Formula:
CaNb4O11 · 8H2O
Common Impurities:

Crystallography of HochelagaiteHide

Crystal System:
Cell Parameters:
a = 19.88 Å, b = 12.83 Å, c = 6.44 Å
β = 93.2°
a:b:c = 1.549 : 1 : 0.502
Unit Cell V:
1,640.03 ų (Calculated from Unit Cell)

Type Occurrence of HochelagaiteHide

Synonyms of HochelagaiteHide

Other Language Names for HochelagaiteHide

Norwegian (Bokmål):Hochelagaitt

Relationship of Hochelagaite to other SpeciesHide

Other Members of this group:
FranconiteNa(Nb2O5)(OH) · 3H2OMon.
Ternovite(Mg,Ca)Nb4O11 · nH2OMon.

Common AssociatesHide

Associated Minerals Based on Photo Data:
Niveolanite2 photos of Hochelagaite associated with Niveolanite on
Shortite2 photos of Hochelagaite associated with Shortite on
Gibbsite2 photos of Hochelagaite associated with Gibbsite on
Pectolite1 photo of Hochelagaite associated with Pectolite on
Gonnardite1 photo of Hochelagaite associated with Gonnardite on
Rhodochrosite1 photo of Hochelagaite associated with Rhodochrosite on

Related Minerals - Nickel-Strunz GroupingHide

4.FM.15FranconiteNa(Nb2O5)(OH) · 3H2OMon.
4.FM.15Ternovite(Mg,Ca)Nb4O11 · nH2OMon.
4.FM.25BelyankiniteCa1-2(Ti,Nb)5O12 · 9H2O (?)Amor.
4.FM.25Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O
4.FM.25Manganbelyankinite(Mn,Ca)(Ti,Nb)5O12 · 9H2O
4.FM.30Silhydrite3SiO2 · H2OOrth.
4.FM.35CuzticiteFe3+2(TeO6) · 3H2OHex.

Related Minerals - Dana Grouping (8th Ed.)Hide · 3H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

18.1.2LueshiteNaNbO3Orth. mmm (2/m 2/m 2/m)
18.1.4FranconiteNa(Nb2O5)(OH) · 3H2OMon.
18.1.7Rankamaite(Na,K)3(Ta,Nb,Al)11(O,OH)31Orth. mmm (2/m 2/m 2/m) : Cmmm
18.1.8Hydropyrochlore(H2O,□)2Nb2(O,OH)6(H2O)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.10RynersoniteCaTa2O6Orth. mmm (2/m 2/m 2/m)
18.1.11Microlite GroupIso. m3m (4/m 3 2/m) : Fd3m
18.1.12BelyankiniteCa1-2(Ti,Nb)5O12 · 9H2O (?)Amor.
18.1.13LatrappiteCa2NbFe3+O6Orth. mmm (2/m 2/m 2/m) : Pnma
18.1.15Bariomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.16ParabariomicroliteBaTa4O10(OH)2 · 2H2OTrig.
18.1.17Bariopyrochlore (of Hogarth 1977)A2Nb2(O,OH)6ZIso. m3m (4/m 3 2/m) : Fd3m
18.1.18AlumotantiteAlTaO4Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.19SimpsoniteAl4(Ta,Nb)3O13(OH,F)Trig. 3 : P3
18.1.22Stannomicrolite (of Hogarth 1977)
18.1.23FoorditeSn2+(Nb,Ta)2O6Mon. 2/m : B2/b
18.1.25Plumbopyrochlore (of Skorobogatova et al.)A2Nb2(O,OH)6Z
18.1.26Plumbomicrolite (of Hogarth 1977)
18.1.27StibiocolumbiteSb(Nb,Ta)O4Orth. mm2
18.1.28StibiotantaliteSb(Ta,Nb)O4Orth. mm2
18.1.31Stibiomicrolite (of Groat et al.)
18.1.35Bismutomicrolite (of Hogarth 1977)Iso. m3m (4/m 3 2/m) : Fd3m
18.1.36Tantalite-(Mn)MnTa2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.37Gerasimovskite(Mn,Ca)(Nb,Ti)5O12 · 9H2O
18.1.38Tapiolite-(Mn)(Mn,Fe)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
18.1.39Columbite-(Mn)(Mn,Fe)(Nb,Ta)2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.42Columbite-(Fe)FeNb2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.43Tantalite-(Fe)FeTa2O6Orth. mmm (2/m 2/m 2/m) : Pbcn
18.1.44ColumbiteOrth. mmm (2/m 2/m 2/m) : Pbcn
18.1.46Tapiolite(Fe,Mn)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m)
18.1.47Tapiolite-(Fe)(Fe,Mn)(Ta,Nb)2O6Tet. 4/mmm (4/m 2/m 2/m) : P42/mnm
18.1.51 Staringite(Fe,Mn)x(Ta,Nb)2xSn6-3xO12

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.

References for HochelagaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
JAMBOR, J.L., SABINA, A.P., ROBERTS, A.C., BONARDI, M., OWENS, D.R., and STURMAN, B.D. (1986) Hochelagaite, a new calcium niobium oxide mineral from Montreal, Quebec. Canadian Mineralogist, 24, 449 453.
TARASSOFF, P., HORVÁTH, L. and PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. Mineralogical Record, 37, 5-60.
HARING, M.M. and McDONALD, A.M. (2014) Franconite, NaNb2O5(OH)•3H2O: structure determination and the role of H-bonding, with comments on the crystal chemistry of franconite-related minerals. Mineralogical Magazine 78, 591-607.

Internet Links for HochelagaiteHide

Localities for HochelagaiteHide

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.
Canada (TL)
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
JAMBOR, J.L., SABINA, A.P., ROBERTS, A.C., BONARDI, M., OWENS, D.R., and STURMAN, B.D. (1986) Hochelagaite, a new calcium niobium oxide mineral from Montreal, Quebec. Canadian Mineralogist, 24, 449 453. Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
    • Montréal
JAMBOR, J.L., SABINA, A.P., ROBERTS, A.C., BONARDI, M., OWENS, D.R., and STURMAN, B.D. (1986) Hochelagaite, a new calcium niobium oxide mineral from Montreal, Quebec. Canadian Mineralogist, 24, 449 453. TARASSOFF, P., HORVÁTH, L. and PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. Mineralogical Record, 37, 5-60.
  • Vestfold
    • Larvik
      • Malerød
Larsen, A.O. (ed.) (2010): "The Langesundsfjord, History, Geology, Pegmatites, Minerals" , Bode Verlag GmBH.; Andresen, P. (2011): Mineralene fra Midtfjellet larvikittbrudd, Malerød, Larvik. Norsk Bergverksmuseum Skrift. 46: 41-47
Larsen, A.O. (2001): Chemical composition of catapleiites from the syenite pegmatites in the Larvik plutonic complex, Norway. Bergverksmuseets Skrift 18, 5-9
    • Sandefjord
      • Vesterøya
Larsen, A. O. (ed.) (2010): The Langesundsfjord. History, geology, pegmatites, minerals. Bode Verlag Gmbh, Salzhemmendorf, Germany, 240 p;Berge, S.A., Larsen, K.E. & Andersen, F. (2011): Buer, Vesterøya, Sandefjord- en typelokalitet for et nytt mineral. Norsk Bergverksmuseum Skrift. 46: 49-56
  • Northern Region
    • Murmanskaya Oblast'
      • Khibiny Massif
Mikhailova, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Ivanyuk, G.Y., Men’shikov, Y.P., and Pakhomovsky, Y.A. (2007): Geology of Ore Deposits 49(7), 590-598.
      • Northern Karelia
Min Rec (2006) 37: 5-60
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Pekov (2001)
  • New Mexico
    • Otero Co.
      • Cornudas Mts
Michael C Michayluk collection
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