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Weloganite Mineral Data

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General Weloganite Information

Help on Chemical  Formula: Chemical Formula: Sr3Na2Zr(CO3)6•3(H2O)
Help on Composition: Composition: Molecular Weight = 814.16 gm
   Sodium      5.65 %  Na    7.61 % Na2O
   Strontium  32.29 %  Sr   38.18 % SrO
   Zirconium  11.20 %  Zr   15.13 % ZrO2
   Hydrogen    0.74 %  H     6.64 % H2O
   Carbon      8.85 %  C    32.43 % CO2
   Oxygen     41.27 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Sr3Na2Zr(CO3)6•3(H2O)
Help on Environment: Environment: Alkalic sill intruding an Ordovician limestone.
Help on IMA Status: IMA Status: Approved IMA 1968
Help on Locality: Locality: St. Michel quarry, Montreal Island, Quebec, Canada. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for William E. Logan (1798-1875), first director of the Canadian Geologic Survey.
Help on Name Pronunciation: Name Pronunciation: Weloganite + Pronunciation Say WELOGANITE
Help on Synonym: Synonym: ICSD 4241
  PDF 27-790

Weloganite Image

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Comments: Columnar aggregates of Weloganite crystals.
Location: Francon quarry, Montreal, Quebec, Canada. Scale: Not Given.
© Lou Perloff / Photo Atlas of Minerals

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  Hydrodresserite   Weloganite

Comments: White spherical aggregates of hydrodresserite with radiating structure with columnar weloganite.
Location: Francon Quarry, Montreal, Quebec, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

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Comments: Pseudo-hexagonal "stacked" plates of white weloganite with flat pedion termination.
Location: Francon quarry, Montréal, Jacques Cartier Co., Québec, Canada. Scale: Crystal size 3 mm.
© Tom Loomis / Dakota Matrix

Weloganite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =1:1:0.7487
Help on Cell Dimensions: Cell Dimensions: a = 8.988, b = 8.988, c = 6.73, Z = 1; alpha = 102.84°, beta = 116.42°, gamma = 59.99° V = 411.08 Den(Calc)= 3.29
Help on Crystal System: Crystal System: Triclinic - Pinacoidal H-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.817(1), 4.36(0.8), 2.594(0.7),

Physical Properties of Weloganite

Help on Cleavage: Cleavage: {0001} Perfect
Help on Color: Color: White, Lemon yellow, Amber, Colorless.
Help on Density: Density: 3.22
Help on Diaphaneity: Diaphaneity: Transparent to Translucent
Help on Fracture: Fracture: Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).
Help on Habit: Habit: Massive - Uniformly indistinguishable crystals forming large masses.
Help on Habit: Habit: Pseudo Hexagonal - Crystals show a hexagonal outline.
Help on Hardness: Hardness: 3.5 - Copper Penny
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white

Optical Properties of Weloganite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.005 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.002 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1923,KPDmeas= 0.1917,KC= 0.1928
Ncalc = 1.62
Help on Optical Data: Optical Data: Biaxial (-), a=1.558, b=1.646, g=1.648, bire=0.0900, 2V(Calc)=16, 2V(Meas)=~15.

Calculated Properties of Weloganite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.04 gm/cc
note: Specific Gravity of Weloganite =3.21 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.03
Boson Index = 0.97
Help on Photoelectric: Photoelectric: PEWeloganite = 51.38 barns/electron
U=PEWeloganite x rElectron Density= 156.40 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Weloganite is Not Radioactive

Weloganite Classification

Help on  Dana Class: Dana Class: (15)Hydrated Carbonates
  (15.03)where A+m B++n (XO3)p � x(H2O), (m+n):p = 1:1 and containing U, Th, Zr, Y
  (15.03.04)Mckelveyite Group Donnayite-(Y) Sr3NaCaY(CO3)6•3(H2O) P1 1 Mckelveyite-(Y) NaCa(Ba,Sr)3(Y,REE)(CO3)6•3(H2O) Cc m Mckelveyite-(Nd)* (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O) P1 1 Weloganite Sr3Na2Zr(CO3)6•3(H2O) P1 1
Help on  Strunz Class: Strunz Class: 05.CC.05 05 - CARBONATES (NITRATES)
  05.C - Carbonates without Additional Anions, with H2O
  05.CC -With rare-earth elements (REE)
05.CC.05 Donnayite-(Y) Sr3NaCaY(CO3)6•3(H2O) P1 1
05.CC.05 Mckelveyite-(Nd)* (Ba,Sr)(Ca,Na,Nd,REE)(CO3)2•3-10(H2O) P1 1
05.CC.05 Mckelveyite-(Y) NaCa(Ba,Sr)3(Y,REE)(CO3)6•3(H2O) Cc m
05.CC.05 Weloganite Sr3Na2Zr(CO3)6•3(H2O) P1 1

Other Weloganite Information

Help on References: References: NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)
Help on See Also: See Also: Links to other databases for Weloganite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 - Am. Min. Crystal Structure Database
4 - Amethyst Galleries' Mineral Gallery
5 - Athena
6 - EUROmin Project
7 - Ecole des Mines de Paris
8 - GeoScienceWorld
9 - Google Images
10 - Google Scholar
11 - Handbook of Mineralogy (MinSocAm)
12 - Handbook of Mineralogy (UofA)
13 - HyperPhysics
14 - MinDAT
15 - Mineralienatlas (Deutsch)
16 - Online Mineral Museum
17 - QUT Mineral Atlas
18 - Ruff.Info

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Dana No: Strunz No: 05.CC.05





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