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Brianroulstonite

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Formula:
Ca
 
3
[B
 
5
O
 
6
(OH)
 
6
](OH)Cl
 
2
 · 8H
 
2
O
System:MonoclinicLustre:Vitreous
Hardness:5
Name:For Brian V. Roulston (1948-), in recognition of his work on the geology of evaporite deposits.
This page provides mineralogical data about Brianroulstonite.

Classification of Brianroulstonite

IMA status:Approved
Strunz 8th edition ID:5/K.09-05
Nickel-Strunz 10th (pending) edition ID:6.EC.35

6 : BORATES
E : Pentaborates
C : Phyllo-pentaborates
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Type Occurrence of Brianroulstonite

Type Locality:Potash Corporation of Saskatchewan Mine (PCS Mine; Potash Corporation of America Mine), Penobsquis, Cardwell Parish, Kings Co., New Brunswick, Canada

Physical Properties of Brianroulstonite

Lustre:Vitreous
Hardness (Mohs):5

Crystallography of Brianroulstonite

Crystal System:Monoclinic

Optical Data of Brianroulstonite

Type:Biaxial (-)
RI values: nα = 1.506 nβ = 1.527 nγ = 1.532
2V:Measured: 56° , Calculated: 50°
Maximum Birefringence:δ = 0.026

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:none

Chemical Properties of Brianroulstonite

Formula:
Ca
 
3
[B
 
5
O
 
6
(OH)
 
6
](OH)Cl
 
2
 · 8H
 
2
O
Essential elements:B, Ca, Cl, H, O
All elements listed in formula:B, Ca, Cl, H, O

Relationship of Brianroulstonite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.EC.05Biringuccite
Na
 
2
B
 
5
O
 
8
(OH) · H
 
2
O
6.EC.05Nasinite
Na
 
4
B
 
10
O
 
17
 · 5H
 
2
O
6.EC.10Gowerite
Ca[B
 
5
O
 
8
(OH)][B(OH)
 
3
] · 3H
 
2
O
6.EC.15P-Veatchite
6.EC.15Veatchite
Sr
 
2
B
 
11
O
 
16
(OH)
 
5
 · H
 
2
O
6.EC.20Volkovskite
KCa
 
4
[B
 
5
O
 
8
OH]
 
4
[B(OH)
 
3
]
 
2
Cl · 4H
 
2
O
6.EC.25Tuzlaite
NaCaB
 
5
O
 
8
(OH)
 
2
 · 3H
 
2
O
6.EC.30Heidornite
Na
 
2
Ca
 
3
B
 
5
O
 
8
(SO
 
4
)
 
2
Cl(OH)
 
2

Other Names for Brianroulstonite

Synonyms:
IMA1996-009
Other Languages:
German:Brianroulstonit
Spanish:Brianroulstonita

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 Brianroulstonite

Reference List:

- +
Mineralogical Record: 29: 234.

Grice, J.D., Galt, R.A., and Van Velthuizen, J. (1997) Brianrulstonite: a new borate mineral with a sheet structure. Canadian Mineralogist: 35: 751-758.

American Mineralogist (1998): 83: 400.

Internet Links for Brianroulstonite

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    • Localities for Brianroulstonite

    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
     
    • New Brunswick
      • Kings Co.
        • Cardwell Parish
          • Penobsquis
    		Canadian Mineralogist (1997): 35: 751; Mineralogical Record (1998): 29: 234.
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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: 21st Jun 2011 15:02:44
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