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About WeloganiteHide

Sir William Edmond Logan
Na2Sr3Zr(CO3)6 · 3H2O
Light yellow, amber-yellow, white
Specific Gravity:
3.20 - 3.22
Crystal System:
Member of:
Named after Sir William Edmond Logan (Montreal, 20 April 1798- Llechryd, Cardiganshire, Wales, 22 June 1875), first director of the Geological Survey of Canada (1842-1870).

Classification of WeloganiteHide

Approval Year:

C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)

3 : AmBn(XO3)p·xH2O, with (m+n):p = 1:1

11 : Carbonates
9 : Carbonates of Pb, Zr and Th

Physical Properties of WeloganiteHide

Light yellow, amber-yellow, white
3½ on Mohs scale
on pseudo{0001}
Triboluminescent with blue light (
3.20 - 3.22 g/cm3 (Measured)    3.208 g/cm3 (Calculated)

Optical Data of WeloganiteHide

Biaxial (-)
RI values:
nα = 1.558 nβ = 1.646 nγ = 1.640
Measured: 15°
Max Birefringence:
δ = 0.082
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of WeloganiteHide

Na2Sr3Zr(CO3)6 · 3H2O

Crystallography of WeloganiteHide

Crystal System:
Class (H-M):
1 - Pedial
Space Group:
Cell Parameters:
a = 8.966 Å, b = 8.98 Å, c = 6.73 Å
α = 102.72°, β = 116.65°, γ = 60.06°
a:b:c = 0.998 : 1 : 0.749
Unit Cell V:
419.66 ų (Calculated from Unit Cell)
Roughly hexagonal, tapering crystals to 10cm, massive.
about [103] repeated at 120 degrees

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
4.35 Å(9)
6.03 Å(6)
2.809 Å(10)
2.590 Å(7)
2.227 Å(7)
2.009 Å(7)
1.961 Å(6)

Type Occurrence of WeloganiteHide

Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa 17257, 61337
Geological Setting of Type Material:
Alkalic sills.
Associated Minerals at Type Locality:

Synonyms of WeloganiteHide

Other Language Names for WeloganiteHide

Relationship of Weloganite to other SpeciesHide

Member of:
Other Members of this group:
Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2OHex. 6mm : P63mc
Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
UM1992-05-CO:CaCeLaNaSr(Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2OTrig. 3m : R3m

Common AssociatesHide

Associated Minerals Based on Photo Data:
37 photos of Weloganite associated with QuartzSiO2
21 photos of Weloganite associated with DresseriteBaAl2(CO3)2(OH)4 · H2O
18 photos of Weloganite associated with CalciteCaCO3
5 photos of Weloganite associated with Dachiardite-Na(Na2,Ca,K2)5Al10Si38O96 · 25H2O
3 photos of Weloganite associated with StrontianiteSrCO3
2 photos of Weloganite associated with CryoliteNa2NaAlF6
2 photos of Weloganite associated with DawsoniteNaAlCO3(OH)2
1 photo of Weloganite associated with SideriteFeCO3
1 photo of Weloganite associated with HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2O
1 photo of Weloganite associated with BaryteBaSO4

Related Minerals - Nickel-Strunz GroupingHide

5.CC.05Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2OTric. 1 : P1
5.CC.05EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2OHex. 6mm : P63mc
5.CC.05Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2OTric.
5.CC.05Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2OTric. 1 : P1
5.CC.10Tengerite-(Y)Y2(CO3)3 · 2-3H2OOrth. mmm (2/m 2/m 2/m) : Pnnm
5.CC.15Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2OOrth.
5.CC.15Lokkaite-(Y)Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2OOrth.
5.CC.20Shomiokite-(Y)Na3Y[CO3]3 · 3H2OOrth.
5.CC.25Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2OOrth.
5.CC.25Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2OOrth. mmm (2/m 2/m 2/m)
5.CC.25Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2OOrth.
5.CC.25Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2OOrth.
5.CC.30Adamsite-(Y)NaY[CO3]2 · 6H2OTric. 1 : P1
5.CC.35Decrespignyite-(Y)Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2OMon.
5.CC.40Galgenbergite-(Ce)Ca(Ce,La,Nd)2(CO3)4 · H2OTric.

Related Minerals - Dana Grouping (8th Ed.)Hide · 3H2OTric. 1 : P1 · 3H2OTric. 1 : P1,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2OTric.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.9.1CerussitePbCO3Orth. mmm (2/m 2/m 2/m)
11.9.3DundasitePbAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
11.9.4Gysinite-(Nd)PbNd(CO3)2(OH) · H2OOrth. mmm (2/m 2/m 2/m)
11.9.5Schuilingite-(Nd)PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2O
11.9.6TuliokiteNa6BaTh(CO3)6 · 6H2OTrig.
11.9.8SabinaiteNa4Zr2TiO4(CO3)4Mon. 2/m : B2/b

Other InformationHide

Pyroelectric. Triboluminescent with blue light (
Thermal Behaviour:
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 WeloganiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
SABINA, A.P., JAMBOR, J.L., and PLANT, A.G. (1968) Weloganite, a new strontium zirconium carbonate from Montreal Island, Canada. Canadian Mineralogist, 9, 468 477.
GAIT, R.I., and GRICE, J.D. (1971) Some observations on weloganite. Canadian Mineralogist, 10, 912. (abstract)
CHEN, T.T., and CHAO, G.Y. (1975) X ray crystallography of weloganite. Canadian Mineralogist, 13, 22 26.
GRICE, J.D. and PERRAULT, G. (1975) The crystal structure of triclinic weloganite. Canadian Mineralogist, 13, 209-216.
TARASSOFF, P., HORVÁTH, L. and PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. Mineralogical Record, 37, 5-60.
HORVÁTH, L. & HORVÁTH, E. (2017) An update of the minerals of the Saint-Amable sill (2017). Canadian Micro-Mineral Association, Micronews 51 (9), 2-4.

Internet Links for WeloganiteHide

Localities for WeloganiteHide

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.
  • Manitoba
Kyla M. Arden and Norman M. Halden (1999) Crystallization and alteration history of britholite in rare-earth-element-enriched pegmatitic segregations associated with the Eden Lake Complex, Manitoba, Canada Can Mineral, 37:1239-1253
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Min Rec (2006) 37: 5-60; Horváth, L and Gault, R.A. (1990), The mineralogy of Mont Saint-Hilaire Quebec. Mineralogical Record: 21: 284-359.
      • Lajemmerais RCM
        • Varennes & St-Amable
          • Saint-Amable sill
HORVÁTH, L. & HORVÁTH, E. (2017) An update of the minerals of the Saint-Amable sill (2017). Canadian Micro-Mineral Association, Micronews 51 (9), 2-4. Horváth & Canadian Museum of Nature collections; confirmed by XRD July 2017
    • Montréal
SABINA, A.P., JAMBOR, J.L., PLANT, A.G. (1968) Weloganite, a new strontium zirconium carbonate from Montreal Island, Canada. Canadian Mineralogist, 9, 468-477.; GRICE, J.D. (1989) A Mineral Locality in Montreal City. In: Famous Mineral Localities of Canada. Published by Fitzhenry & Whiteside Limited & the National Museum of Natural Sciences, 190 pages: 109-114; 176-178.; TARASSOFF, P., HORVÁTH, L., PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. The Mineralogical Record, 37, 5-60.
      • Montréal-Est
TARASSOFF, P., HORVÁTH, L. and PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. Mineralogical Record, 37, 5-60. Canadian Museum of Nature collection specimens.
South Africa
  • North West
    • Bojanala Platinum District
R. Liferovich -L. Horváth p.c. 2004
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