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Walkerite

Formula:
Ca
 
16
(Mg,Li,[])
 
2
[B
 
13
O
 
17
(OH)
 
12
]
 
4
Cl
 
6
·28H
 
2
O
System:OrthorhombicColour:Colourless
Hardness:3
This page provides mineralogical data about Walkerite.

Classification of Walkerite

IMA status:Approved
Nickel-Strunz 10th (pending) edition ID:6.GB.20

6 : BORATES
G : Heptaborates and other megaborates
B : Phyllo-nonborates, etc.
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Type Occurrence of Walkerite

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

Physical Properties of Walkerite

Lustre:Vitreous
Diaphaneity (Transparency):Transparent, Translucent
Colour:Colourless
Hardness (Mohs):3
Hardness Data:Measured
Density (measured):2.07 g/cm3

Crystallography of Walkerite

Crystal System:Orthorhombic
Class (H-M):mm2 - Pyramidal
Space Group:Pba2
Cell Parameters:a = 15.52Å, b = 22.74Å, c = 8.76Å
Ratio:a:b:c = 0.682 : 1 : 0.385
Unit Cell Volume:V 3,091.62 ų (Calculated from Unit Cell)
Z:1
Morphology:Fibrous to bladed crystals to 2mm and their bundles to 7 mm.

Chemical Properties of Walkerite

Formula:
Ca
 
16
(Mg,Li,[])
 
2
[B
 
13
O
 
17
(OH)
 
12
]
 
4
Cl
 
6
·28H
 
2
O
All elements listed in formula:B, Ca, Cl, H, Li, Mg, O

Relationship of Walkerite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.GB.05Studenitsite
NaCa
 
2
[B
 
9
O
 
14
(OH)
 
4
]·2H
 
2
O
6.GB.10Penobsquisite
Ca
 
2
Fe
2+
 
[Cl|B
 
9
O
 
13
(OH)
 
6
]Cl · 4H
 
2
O
6.GB.15Preobrazhenskite
Mg
 
3
B
 
11
O
 
15
(OH)
 
9

Other Names for Walkerite

Synonyms:
IMA2001-051
Other Languages:
German:Walkerit
Russian:Уолкерит

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 Walkerite

Reference List:Grice, J.D., Galt, R.A., Van Velthuizen, J., and Pratt, A. (2002) Walkerite, a new borate mineral species inan evaporitic sequence from Sussex, New Brunswick, Canada. Canadian Mineralogist (2002): 40: 1675-1686.

Internet Links for Walkerite

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  • Raman and XRD data at RRUFF project
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    Localities for Walkerite

    (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.
        • Sussex
          • Cardwell Parish
            • Penobsquis
    		Canadian Mineralogist (2002): 40: 1675-1686.
    Mineral and/or Locality
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    Copyright © Jolyon Ralph and Ida Chau 1993-2009. 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. If you would like to add information to improve the quality of our database, then click here to register. Current server date and time: 9th Nov 2009 14:32:26