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Montroyalite

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About MontroyaliteHide

05485300015822447843612.jpg
Mont Royal, Quebec, Canada
Formula:
Sr4Al8(CO3)3(OH,F)26 · 10-11H2O
Colour:
White
Lustre:
Waxy
Hardness:
Specific Gravity:
2.677
Crystal System:
Triclinic
Name:
Named by A.C. Roberts, A.P. Sabina, M. Bonardi, J.L. Jambor, R.A. Ramik, B.D. Sturman, and M.J. Carr in 1986 for the type locality of Mont Royal. It is one of the Monteregian hills and a prominant landmark in Montreal, which itself is named after the hill.
Probably related to the dresserite group.


Classification of MontroyaliteHide

Approved
Approval Year:
1985
First Published:
1986
5.DB.10

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
16b.5.3.1

16b : HYDRATED CARBONATES CONTAINING HYDROXYL OR HALOGEN
5 : AmBn(XO3)pZqxH2O & with (m+n):p = 4:1
11.7.11

11 : Carbonates
7 : Carbonates of Al

Physical Properties of MontroyaliteHide

Transparency:
Translucent
Comment:
Dull exterior of hemispheres
Colour:
White
Streak:
White
Hardness:
3½ on Mohs scale
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Irregular/Uneven, Splintery
Density:
2.677 g/cm3 (Measured)    

Optical Data of MontroyaliteHide

Type:
Biaxial (-)
RI values:
nα = 1.515 nβ = 1.530 nγ = 1.545
2V:
Measured: 80° to 89°, Calculated: 88°
Max Birefringence:
δ = 0.030
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
relatively weak

Chemical Properties of MontroyaliteHide

Formula:
Sr4Al8(CO3)3(OH,F)26 · 10-11H2O
IMA Formula:
Sr4Al8(CO3)3(OH)26 · 10H2O

Crystallography of MontroyaliteHide

Crystal System:
Triclinic
Comment:
Probably

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
6.57 Å(100)
4.00 Å(50)
3.283 Å(55)
3.190 Å(50)
2.862 Å(40)
2.551 Å(40)
2.481 Å(40)
2.356 Å(45)

Type Occurrence of MontroyaliteHide

General Appearance of Type Material:
Translucent white millimeter-sized hemispheres.
Place of Conservation of Type Material:
Canadian Geological Survey, Ottawa, Canada, 64261–64265.
Geological Setting of Type Material:
Silicocarbonate sill
Associated Minerals at Type Locality:

Synonyms of MontroyaliteHide

Other Language Names for MontroyaliteHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Montroyalite associated with StrontiodresseriteSrAl2(CO3)2(OH)4 · H2O

Related Minerals - Nickel-Strunz GroupingHide

5.DB.05AlumohydrocalciteCaAl2(CO3)2(OH)4 · 4H2OTric. 1 : P1
5.DB.05NasledovitePbMn3Al4(CO3)4(SO4)O5 · 5H2O
5.DB.05Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O
5.DB.05UM1977-02-CO:AlCaHCa6Al2(CO3)3O6 · 32H2O
5.DB.10DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
5.DB.10DundasitePbAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
5.DB.10StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.
5.DB.10PetterditePbCr3+2(CO3)2(OH)4 · H2OOrth.
5.DB.10KochsándoriteCaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m) : Pnma
5.DB.15HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
5.DB.20Schuilingite-(Nd)PbCu(Nd,Gd,Sm,Y)(CO3)3(OH) · 1.5H2OOrth. mm2
5.DB.25SergeeviteCa2Mg11(CO3)9(HCO3)4(OH)4•6H2OTrig.
5.DB.30SzymańskiiteHg16(Ni,Mg)6(CO3)12(OH)12(H3O)8•3H2OHex.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

11.7.1ScarbroiteAl5(CO3)(OH)13 · 5H2OHex.
11.7.2HydroscarbroiteAl14(CO3)3(OH)36 · nH2OTric.
11.7.3DawsoniteNaAlCO3(OH)2Orth. mmm (2/m 2/m 2/m) : Imma
11.7.4HydrotalciteMg6Al2(CO3)(OH)16 · 4H2OTrig. 3m (3 2/m) : R3m
11.7.5Hydrotalcite-2HMg6Al2(CO3)(OH)16 · 4H2OHex. 6/mmm (6/m 2/m 2/m) : P63/mmc
11.7.6IndigiriteMg2Al2(CO3)4(OH)2 · 15H2O
11.7.7AlumohydrocalciteCaAl2(CO3)2(OH)4 · 4H2OTric. 1 : P1
11.7.8Para-alumohydrocalciteCaAl2(CO3)2(OH)4 · 6H2O
11.7.9TunisiteNaCa2Al4(CO3)4(OH)8ClTet. 4/mmm (4/m 2/m 2/m) : P4/nmm
11.7.10WermlanditeMg7Al2(OH)18[Ca(H2O)6][SO4]2 · 6H2OTrig. 3m (3 2/m) : P3c1
11.7.12DresseriteBaAl2(CO3)2(OH)4 · H2OOrth. mmm (2/m 2/m 2/m)
11.7.13HydrodresseriteBaAl2(CO3)2(OH)4 · 3H2OTric.
11.7.14StrontiodresseriteSrAl2(CO3)2(OH)4 · H2OOrth.

Fluorescence of MontroyaliteHide

Fluoresces white under long and short wave UV.

Other InformationHide

Notes:
Soluble in 1:l HCl at room temperature.
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 MontroyaliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Roberts, A.C., Sabina, A.P., Bonardi, M., Jambor, J.L., Ramik, R.A., Sturman, B.D., Carr, M.J. (1986) Montroyalite, a new hydrated Sr-Al hydroxycarbonate from the Francon quarry, Montreal, Quebec. Canadian Mineralogist: 24: 455-459.
Hawthorne, F.C., Jambor, J.L., Bladh, K.W., Burke, E.A.J., Grice, J.D., Phillips, D., Roberts, A.C., Schedler, R.A., Shigley, J.E. (1987) New mineral names. American Mineralogist: 72: 1023-1028.
Tarassoff, P., Horváth, L., Pfenninger-Horváth, E. (2006) Famous mineral localities: the Francon quarry, Montréal, Québec. Mineralogical Record: 37: 5-60.

Internet Links for MontroyaliteHide

Localities for MontroyaliteHide

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
    • Montréal
ROBERTS, A.C., SABINA, A.P., BONARDI, M., JAMBOR, J.L., RAMIK, R.A., STURMAN, B.D., CARR, M.J. (1986) Montroyalite, a new hydrated Sr-Al hydroxycarbonate from the Francon quarry, Montreal, Quebec. Canadian Mineralogist, 24, 455-459.; 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.
 
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