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Weloganite

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Sir William Edmond Logan
Formula:
Na2Sr3Zr(CO3)6 · 3H2O
Colour:
Light yellow, amber-yellow, white
Lustre:
Vitreous
Hardness:
Specific Gravity:
3.20 - 3.22
Crystal System:
Triclinic
Member of:
Name:
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 Weloganite

Approved
Approval Year:
1967
5.CC.05

5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
15.3.4.4

15 : HYDRATED NORMAL CARBONATES
3 : AmBn(XO3)p·xH2O, with (m+n):p = 1:1
11.9.7

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

Physical Properties of Weloganite

Vitreous
Transparency:
Translucent
Colour:
Light yellow, amber-yellow, white
Streak:
white
Hardness:
3½ on Mohs scale
Cleavage:
Perfect
on pseudo{0001}
Fracture:
Conchoidal
Comment:
Triboluminescent with blue light (http://www.mindat.org/mesg-6-204391.html)
Density:
3.20 - 3.22 g/cm3 (Measured)    3.208 g/cm3 (Calculated)

Optical Data of Weloganite

Type:
Biaxial (-)
RI values:
nα = 1.558 nβ = 1.646 nγ = 1.640
2V:
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:
Moderate
Dispersion:
weak

Chemical Properties of Weloganite

Formula:
Na2Sr3Zr(CO3)6 · 3H2O

Crystallography of Weloganite

Crystal System:
Triclinic
Class (H-M):
1 - Pedial
Space Group:
P1
Cell Parameters:
a = 8.966 Å, b = 8.98 Å, c = 6.73 Å
α = 102.72°, β = 116.65°, γ = 60.06°
Ratio:
a:b:c = 0.998 : 1 : 0.749
Unit Cell V:
419.66 ų (Calculated from Unit Cell)
Z:
1
Morphology:
Roughly hexagonal, tapering crystals to 10cm, massive.
Twinning:
about [103] repeated at 120 degrees

X-Ray Powder Diffraction

Image Loading

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

Type Occurrence of Weloganite

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 Weloganite

Other Language Names for Weloganite

Relationship of Weloganite to other Species

Member of:
Other Members of this group:
Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2O
EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2O

Common Associates

Associated Minerals Based on Photo Data:
Quartz37 photos of Weloganite associated with Quartz on mindat.org.
Dresserite21 photos of Weloganite associated with Dresserite on mindat.org.
Calcite18 photos of Weloganite associated with Calcite on mindat.org.
Dachiardite-Na5 photos of Weloganite associated with Dachiardite-Na on mindat.org.
Strontianite3 photos of Weloganite associated with Strontianite on mindat.org.
Cryolite2 photos of Weloganite associated with Cryolite on mindat.org.
Dawsonite2 photos of Weloganite associated with Dawsonite on mindat.org.
Siderite1 photo of Weloganite associated with Siderite on mindat.org.
Hydrodresserite1 photo of Weloganite associated with Hydrodresserite on mindat.org.
Baryte1 photo of Weloganite associated with Baryte on mindat.org.

Related Minerals - Nickel-Strunz Grouping

5.CC.05Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2O
5.CC.05EwalditeBa(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O
5.CC.05Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2O
5.CC.05Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2O
5.CC.10Tengerite-(Y)Y2(CO3)3 · 2-3H2O
5.CC.15Kimuraite-(Y)Ca(Y,Nd)2(CO3)4 · 6H2O
5.CC.15Lokkaite-(Y)Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O
5.CC.20Shomiokite-(Y)Na3Y[CO3]3 · 3H2O
5.CC.25Calkinsite-(Ce)(Ce,La)2(CO3)3 · 4H2O
5.CC.25Lanthanite-(Ce)(Ce,La,Nd)2(CO3)3 · 8H2O
5.CC.25Lanthanite-(La)(La,Ce)2(CO3)3 · 8H2O
5.CC.25Lanthanite-(Nd)(Nd,La)2(CO3)3 · 8H2O
5.CC.30Adamsite-(Y)NaY[CO3]2 · 6H2O
5.CC.35Decrespignyite-(Y)Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2O
5.CC.40Galgenbergite-(Ce)Ca(Ce,La,Nd)2(CO3)4 · H2O

Related Minerals - Hey's Chemical Index of Minerals Grouping

11.9.1CerussitePbCO3
11.9.2HydrocerussitePb3(CO3)2(OH)2
11.9.3DundasitePbAl2(CO3)2(OH)4 · H2O
11.9.4Gysinite-(Nd)PbNd(CO3)2(OH) · H2O
11.9.5Schuilingite-(Nd)PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2O
11.9.6TuliokiteNa6BaTh(CO3)6 · 6H2O
11.9.8SabinaiteNa4Zr2TiO4(CO3)4

Related Minerals - Dana Grouping (8th Ed.)

15.3.4.1Donnayite-(Y)NaCaSr3Y(CO3)6 · 3H2O
15.3.4.2Mckelveyite-(Y)NaCaBa3Y(CO3)6 · 3H2O
15.3.4.3Mckelveyite-(Nd)(Ba,Sr)(Nd,Ce,La)(CO3)2 · 4-10H2O

Other Information

Electrical:
Pyroelectric. Triboluminescent with blue light (http://www.mindat.org/mesg-6-204391.html)
Thermal Behaviour:
Pyroelectric
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 Weloganite

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.

Internet Links for Weloganite

mindat.org URL:
https://www.mindat.org/min-4266.html
Please feel free to link to this page.
Specimens:
The following Weloganite specimens are currently listed for sale on minfind.com.

Localities for Weloganite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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.
Canada
 
  • 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 & Canadian Museum of Nature collections; confirmed by XRD July 2017
    • Montréal
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. TARASSOFF, P., HORVÁTH, L. and PFENNINGER-HORVÁTH, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. 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 Province
    • Bojanala Platinum District
      • Western Bushveld Complex
R. Liferovich -L. Horváth p.c. 2004
Mineral and/or Locality  
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