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Montroyalite

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Francon quarry, Montréal, Québec, Canada
© 2008, JGW

Show Montroyalite Photos (2)



Formula:
Sr
 
4
Al
 
8
(CO
 
3
)
 
3
(OH,F)
 
26
 · 10-11H
 
2
O
Hardness:3½
This page provides mineralogical data about Montroyalite.

Classification of Montroyalite

IMA status:Approved 1985
Strunz 8th edition ID:5/E.08-80
Nickel-Strunz 10th (pending) edition ID:5.DB.10

5 : CARBONATES (NITRATES)
D : Carbonates with additional anions, with H2O
B : With large and medium-sized cations
Dana 8th edition ID:16b.5.3.1

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

11 : Carbonates
7 : Carbonates of Al
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Type Occurrence of Montroyalite

Type Locality:Francon quarry, Montréal, Québec, Canada
Year of Discovery:1986

Physical Properties of Montroyalite

Hardness (Mohs):3½

Optical Data of Montroyalite

Type:Biaxial (-)
RI values: nα = 1.515 nβ = 1.530 nγ = 1.545
2V:Measured: 80° to 89°, Calculated: 88°
Maximum Birefringence:δ = 0.030

Chart 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 Montroyalite

Formula:
Sr
 
4
Al
 
8
(CO
 
3
)
 
3
(OH,F)
 
26
 · 10-11H
 
2
O
Essential elements:Al, C, H, O, Sr
All elements listed in formula:Al, C, F, H, O, Sr

Relationship of Montroyalite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
5.DB.05Alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
5.DB.05Nasledovite
PbMn
 
3
Al
 
4
(CO
 
3
)
 
4
(SO
 
4
)O
 
5
 · 5H
 
2
O
5.DB.05Para-alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 6H
 
2
O
5.DB.05UM1977-02-CO:AlCaH
Ca
 
3
Al
 
2
(CO
 
3
)
 
3
O
 
6
 · 32H
 
2
O
5.DB.10Dresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Dundasite
PbAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Strontiodresserite
(Sr,Ca)Al
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Petterdite
PbCr
3+
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.10Kochsándorite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
5.DB.15Hydrodresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
5.DB.20Schuilingite-(Nd)
PbCu(Nd,Gd,Sm,Y)(CO
 
3
)
 
3
(OH) · 1.5H
 
2
O
5.DB.25Sergeevite
Ca
 
2
Mg
 
11
(CO
 
3
)
 
13
 · 10H
 
2
O
5.DB.30Szymańskiite
Hg
 
16
(Ni,Mg)
 
6
(CO
 
3
)
 
12
(OH)
 
12
 · 11H
 
2
O
Related Minerals - Hey's Index Grouping:

- +
11.7.1Scarbroite
Al
 
5
(CO
 
3
)(OH)
 
13
 · 5H
 
2
O
11.7.2Hydroscarbroite
Al
 
14
(CO
 
3
)
 
3
(OH)
 
36
 · nH
 
2
O
11.7.3Dawsonite
NaAlCO
 
3
(OH)
 
2
11.7.4Hydrotalcite
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
11.7.5Manasseite
Mg
 
6
Al
 
2
(CO
 
3
)(OH)
 
16
 · 4H
 
2
O
11.7.6Indigirite
Mg
 
2
Al
 
2
(CO
 
3
)
 
4
(OH)
 
2
 · 15H
 
2
O
11.7.7Alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
11.7.8Para-alumohydrocalcite
CaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 6H
 
2
O
11.7.9Tunisite
NaCa
 
2
Al
 
4
(CO
 
3
)
 
4
(OH)
 
8
Cl
11.7.10Wermlandite
Mg
 
7
(Ca,Mg)(Al,Fe)
 
2
(SO
 
4
)
 
2
(OH)
 
18
 · 12H
 
2
O
11.7.12Dresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O
11.7.13Hydrodresserite
BaAl
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · 3H
 
2
O
11.7.14Strontiodresserite
(Sr,Ca)Al
 
2
(CO
 
3
)
 
2
(OH)
 
4
 · H
 
2
O

Other Names for Montroyalite

Synonyms:
IMA1985-001
Other Languages:
German:Montroyalit
Spanish:Montroyalita

Other Information

Health Warning:No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for Montroyalite

Reference List:

- +
Canadian Mineralogist (1986): 24: 455-459.

American Mineralogist (1987): 72: 1025.

Internet Links for Montroyalite

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    • Localities for Montroyalite

    The 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.
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    (TL) indicates type locality. ? 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
     
    • Québec
      • Montréal
    		Canadian Mineralogist (1986): 24, 455-459.
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    Copyright © Jolyon Ralph and Ida Chau 1993-2011. Site Map. Locality, mineral & photograph data are the copyright of the individuals who submitted them.Further information contact the Site hosted & developed by Jolyon Ralph. Mindat.org is an online information resource dedicated to providing free mineralogical information to all. Mindat relies on the contributions of hundreds of members and supporters. Mindat does not offer minerals for sale. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 22nd Jun 2011 00:43:22
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