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Pringleite

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Formula:
Ca
 
9
B
 
26
O
 
34
(OH)
 
24
Cl
 
4
 · 13H
 
2
O
System:TriclinicColour:Colourless to orange.
Hardness:3 - 4
Dimorph of:Ruitenbergite


The triclinic dimorph of Ruitenbergite.

Classification of Pringleite

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

6 : BORATES
G : Heptaborates and other megaborates
D : Mega-tektoborates
Dana 8th edition ID:26.5.17.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
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Type Occurrence of Pringleite

Type Locality:Potash Corporation of Saskatchewan Mine (PCS Mine; Potash Corporation of America Mine), Penobsquis, Cardwell Parish, Kings Co., New Brunswick, Canada
Year of Discovery:1993

Physical Properties of Pringleite

Colour:Colourless to orange.
Hardness (Mohs):3 - 4

Crystallography of Pringleite

Crystal System:Triclinic
Cell Parameters:a = 12.75Å, b = 13.06Å, c = 9.73Å
α = 102.14°, β = 102.03°, γ = 85.68°
Ratio:a:b:c = 0.976 : 1 : 0.745
Unit Cell Volume:V 1,548.33 ų (Calculated from Unit Cell)

Optical Data of Pringleite

Type:Biaxial (+)
RI values: nα = 1.537 nβ = 1.548 nγ = 1.570
2V:Measured: 71° to 77°, Calculated: 72°
Maximum Birefringence:δ = 0.033

Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:Low
Dispersion:weak

Chemical Properties of Pringleite

Formula:
Ca
 
9
B
 
26
O
 
34
(OH)
 
24
Cl
 
4
 · 13H
 
2
O
Essential elements:B, Ca, Cl, H, O
All elements listed in formula:B, Ca, Cl, H, O

Relationship of Pringleite to other Species

Related Minerals - Nickel-Strunz Grouping):

- +
6.GD.05Ruitenbergite
Ca
 
9
B
 
26
O
 
34
(OH)
 
24
Cl
 
4
 · 13H
 
2
O
6.GD.10Metaborite
HBO
 
2

Other Names for Pringleite

Synonyms:
IMA1992-010
Other Languages:
German:Pringleit
Russian:Принглит
Spanish:Pringleita

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 Pringleite

Reference List:

- +
Roberts, A.C., Stirling, J.A.R., Grice, J.D., Burns, P.C., Curtis, J.D., and Jambor, J.L. (1993) Pringleite and ruitenbergite, polymorphs of Ca2B26O34(OH)24Cl4·13H2O, two new mineral species from Sussex, New Brunswick. Canadian Mineralogist: 31: 795-800.

Grice, J.D., Burns, P.C., and Hawthorne, F.C. (1994) Determination of the megastructures of the borate polymorphs pringleite and ruitenbergite. Canadian Mineralogist (1994): 32: 1-14.

New Minerals (1997), New Minerals 1990-1994.

Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).

Internet Links for Pringleite

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    • Localities for Pringleite

    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 (1996): 34: 657-665.
        • Studholm Parish
    		Canadian Mineralogist: 43: 1469-1487.
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