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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), 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
Essential elements:
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
German names:
Walkerit
Russian names:
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
  • American Mineralogist Crystal Structure Database
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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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