Weloganite
A valid IMA mineral species
This page kindly sponsored by Ronnie Van Dommelen
About Weloganite
Sir William Edmond Logan
Formula:
Na2Sr3Zr(CO3)6 · 3H2O
Colour:
Light yellow, amber-yellow, white
Lustre:
Vitreous
Hardness:
3½
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).
Type Locality:
Unique Identifiers
Mindat ID:
4266
Long-form identifier:
mindat:1:1:4266:2
GUID
(UUID V4):
(UUID V4):
5aa8fbd9-e652-4bff-bfb6-f1152e323d5a
IMA Classification of Weloganite
Classification of Weloganite
5.CC.05
5 : CARBONATES (NITRATES)
C : Carbonates without additional anions, with H2O
C : With rare earth elements (REE)
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
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
11 : Carbonates
9 : Carbonates of Pb, Zr and Th
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Wlg | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
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}
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
weak
Chemistry of Weloganite
Mindat 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°
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 10 cm, massive.
Twinning:
About [103] repeated at 120 degrees.
Crystal Structure
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2x2x2 | 3x3x3 | 4x4x4
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
| ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
|---|---|---|---|---|---|---|---|
| 0005116 | Weloganite | Grice J D, Perrault G (1975) The crystal structure of triclinic weloganite The Canadian Mineralogist 13 209-216 |  | 1975 | St. Michel, Montreal Island, Quebec, Canada | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
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Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 4.35 Å | (90) |
| 6.03 Å | (60) |
| 2.809 Å | (100) |
| 2.590 Å | (70) |
| 2.227 Å | (70) |
| 2.009 Å | (70) |
| 1.961 Å | (60) |
Comments:
Francon quarry, Montréal, Québec, Canada. Data from the type description.
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4b: Highly evolved igneous rocks | >3.0 |
| 35 : Ultra-alkali and agpaitic igneous rocks |
Type Occurrence of Weloganite
General Appearance of Type Material:
Poorly developed crystals elongate on [001]. Roughly hexagonal in outline. The prism faces are heavily striated and grooved parallel to the base due to pronounced oscillatory growth. Also massive.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, Ontario, Canada, numbers 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:
| Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O | Tric. 1 : P1 |
| Alicewilsonite-(YLa) | Na2Sr2YLa(CO3)6 · 3H2O | Tric. 1 : P1 |
| Bainbridgeite-(NdCe) | Na2Ba2NdCe(CO3)6 · 3H2O | Tric. 1 : P1 |
| Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O | Tric. 1 : P1 |
| Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
| Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O | Hex. 6mm : P63mc |
| Mckelveyite-(Nd) | NaCaBa3Nd(CO3)6 · 3H2O | Mon. m : Bb |
| Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O | Tric. 1 : P1 |
Common Associates
Associated Minerals Based on Photo Data:
| 72 photos of Weloganite associated with Quartz | SiO2 |
| 38 photos of Weloganite associated with Dresserite | BaAl2(CO3)2(OH)4 · H2O |
| 32 photos of Weloganite associated with Calcite | CaCO3 |
| 14 photos of Weloganite associated with Strontianite | SrCO3 |
| 13 photos of Weloganite associated with Dawsonite | NaAlCO3(OH)2 |
| 7 photos of Weloganite associated with Franconite | Na(Nb2O5)(OH) · 3H2O |
| 6 photos of Weloganite associated with UM1990-28-OHF:Al | Al(OH,F)3 |
| 5 photos of Weloganite associated with Dachiardite-Na | (Na2,Ca,K2)5Al10Si38O96 · 25H2O |
| 5 photos of Weloganite associated with Marcasite | FeS2 |
| 5 photos of Weloganite associated with Elpidite | Na2ZrSi6O15 · 3H2O |
Related Minerals - Strunz-mindat Grouping
| 5.CC. | Alicewilsonite-(YCe) | Na2Sr2YCe(CO3)6 · 3H2O |
| 5.CC. | Yuchuanite-(Y) | Y2(CO3)3 · H2O |
| 5.CC. | Bainbridgeite-(NdCe) | Na2Ba2NdCe(CO3)6 · 3H2O |
| 5.CC.05 | Donnayite-(Y) | NaCaSr3Y(CO3)6 · 3H2O |
| 5.CC.05 | Ewaldite | Ba(Na,Ca,Y,Ce,K)(CO3)2 · 2.6H2O |
| 5.CC.05 | Mckelveyite-(Nd) | NaCaBa3Nd(CO3)6 · 3H2O |
| 5.CC.05 | Mckelveyite-(Y) | NaCaBa3Y(CO3)6 · 3H2O |
| 5.CC.05 | Unnamed (MSH UK-37A) | Sr3NaCaY(CO3)6 · 3H2O |
| 5.CC.05 | UM1992-05-CO:CaCeLaNaSr | (Sr,Na,Y,REE,Ca,Ba)2(CO3)2 · H2O |
| 5.CC.05 | Mckelveyite Group | A3B3(CO3)6 · 3H2O |
| 5.CC.05 | Bainbridgeite-(YCe) | Na2Ba2YCe(CO3)6 · 3H2O |
| 5.CC.05 | Alicewilsonite-(YLa) | Na2Sr2YLa(CO3)6 · 3H2O |
| 5.CC.10 | Tengerite-(Y) | Y2(CO3)3 · 2-3H2O |
| 5.CC.15 | Kimuraite-(Y) | Ca(Y,Nd)2(CO3)4 · 6H2O |
| 5.CC.15 | Lokkaite-(Y) | Ca(Y,Gd,Nd,Dy)4(CO3)7 · 9H2O |
| 5.CC.15 | Hizenite-(Y) | Ca2Y6(CO3)11 · 14H2O |
| 5.CC.20 | Shomiokite-(Y) | Na3Y[CO3]3 · 3H2O |
| 5.CC.25 | Calkinsite-(Ce) | (Ce,La)2(CO3)3 · 4H2O |
| 5.CC.25 | Lanthanite-(Ce) | (Ce,La,Nd)2(CO3)3 · 8H2O |
| 5.CC.25 | Lanthanite-(La) | (La,Ce)2(CO3)3 · 8H2O |
| 5.CC.25 | Lanthanite-(Nd) | (Nd,La)2(CO3)3 · 8H2O |
| 5.CC.30 | Adamsite-(Y) | NaY[CO3]2 · 6H2O |
| 5.CC.35 | Decrespignyite-(Y) | Cu(Y,REE)4(CO3)4(OH)5Cl · 2H2O |
| 5.CC.40 | Galgenbergite-(Ce) | Ca(Ce,La,Nd)2(CO3)4 · H2O |
| 5.CC.45 | Lecoqite-(Y) | Na3Y(CO3)3 · 6H2O |
Other Information
Electrical:
Pyroelectric. Triboluminescent with blue light (http://www.mindat.org/mesg-6-204391.html)
Thermal Behaviour:
Pyroelectric.
Notes:
Effervesces violently in cold dilute hydrochloric acid.
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 Weloganite
mindat.org URL:
https://www.mindat.org/min-4266.html
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References for Weloganite
Reference List:
Sabina, Ann P., Jambor, John L., Plant, A. G. (1968) Weloganite, a new strontium zirconium carbonate from Montreal Island, Canada. The Canadian Mineralogist, 9 (4) 468-477
Chen, T. T., Chao, G. Y. (1975) X-ray crystallography of weloganite. The Canadian Mineralogist, 13 (1) 22-26
Grice, J. D., Perrault, G. (1975) The crystal structure of triclinic weloganite. The Canadian Mineralogist, 13 (3) 209-216
Frost, Ray L., Xi, Yunfei, Scholz, Ricardo, Belotti, Fernanda Maria, Filho, Mauro Cândido (2013) Infrared and Raman spectroscopic characterization of the carbonate mineral weloganite – Sr3Na2Zr(CO3)6·3H2O and in comparison with selected carbonates. Journal of Molecular Structure, 1039. 101-106 doi:10.1016/j.molstruc.2013.02.005
Localities for Weloganite
symbol to view information about a locality.
The Locality List
- 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).
All localities listed without proper references should be considered as questionable.
Canada | |
| Kyla M. Arden and Norman M. Halden (1999) |
| Horváth et al. (1990) +1 other reference |
| confirmed by XRD July 2017 +1 other reference |
| Sabina et al. (1968) +4 other references |
| Canadian Museum of Nature collection ... +1 other reference |
South Africa | |
| R. Liferovich -L. Horváth p.c. 2004 |
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Francon quarry, Montréal, Québec, Canada