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Pringleite

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About PringleiteHide

Gordon J. Pringle
Formula:
Ca9B26O34(OH)24Cl4 · 13H2O
Colour:
Colourless, very pale yellow, orangish.
Lustre:
Vitreous
Hardness:
3 - 4
Specific Gravity:
2.22
Crystal System:
Triclinic
Name:
Named in honor of Gordon James Pringle (7 September 1944, New Brunswick, Canada - 3 February 2013, Ottawa, Ontario, Canada) mineralogist and electron-microprobe analyst with the Geological Survey of Canada for his contributions to Canadian mineralogy.
Dimorph of:
The triclinic dimorph of Ruitenbergite.


Classification of PringleiteHide

Approved
Approval Year:
1992
First Published:
1993
Approval History:
IMA1992-010
6.GD.05

6 : BORATES
G : Heptaborates and other megaborates
D : Mega-tektoborates
26.5.17.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates

Physical Properties of PringleiteHide

Vitreous
Transparency:
Transparent, Translucent
Colour:
Colourless, very pale yellow, orangish.
Streak:
white
Hardness:
3 - 4 on Mohs scale
Tenacity:
Brittle
Fracture:
Irregular/Uneven, Conchoidal
Density:
2.22 g/cm3 (Measured)    2.11 g/cm3 (Calculated)

Optical Data of PringleiteHide

Type:
Biaxial (+)
RI values:
nα = 1.537 nβ = 1.548 nγ = 1.570
2V:
Measured: 71° to 77°, Calculated: 72°
Max Birefringence:
δ = 0.033
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Low
Dispersion:
weak

Chemical Properties of PringleiteHide

Formula:
Ca9B26O34(OH)24Cl4 · 13H2O

Crystallography of PringleiteHide

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

Type Occurrence of PringleiteHide

General Appearance of Type Material:
Colorless to orange, platy, subhedral to anhedral cleaved masses up to 4 mm in size.
Place of Conservation of Type Material:
Systematic Reference Series, National Mineral Collection of Canada (NMCC), Geological Survey of Canada, Ottawa, Ontario, Canada, catalogue 66920.
Display Series, NMCC, Canadian Museum of Nature, Ottawa, Ontario, Canada, catalogue 82047.
Geological Setting of Type Material:
Potash deposit with borate minerals
Reference:
Roberts, A.C., Stirling, J.A.R., Grice, J.D., Burns, P.C., Curtis, J.D., 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.

Synonyms of PringleiteHide

Other Language Names for PringleiteHide

Related Minerals - Nickel-Strunz GroupingHide

6.GD.05RuitenbergiteCa9B26O34(OH)24Cl4 · 13H2OMon.
6.GD.10MetaboriteHBO2Iso.

Related Minerals - Dana Grouping (8th Ed.)Hide

26.5.17.2RuitenbergiteCa9B26O34(OH)24Cl4 · 13H2OMon.

Fluorescence of PringleiteHide

Not fluorescent

Other InformationHide

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

References for PringleiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Roberts, A.C., Stirling, J.A.R., Grice, J.D., Burns, P.C., Curtis, J.D., 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., Hawthorne, F.C. (1994) Determination of the megastructures of the borate polymorphs pringleite and ruitenbergite. Canadian Mineralogist: 32: 1-14.
Jambor, J.L., Roberts, A.C., Vanko, D.A. (1994) New mineral names. American Mineralogist: 79: 1009-1014.
Grew, E.S., Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Grice, J.D., Gault, R.A., Van Velthuizen, J.J. (2005) Borate minerals from the Penobsquis and Millstream deposits, Southern New Brunswick, Canada. Canadian Mineralogist: 43: 1469-1487.

Internet Links for PringleiteHide

Localities for PringleiteHide

This 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.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
Canada (TL)
 
  • New Brunswick
    • Kings Co.
      • Cardwell Parish
        • Penobsquis
ROBERTS, A.C., STIRLING, J.A.R., GRICE, J.D., BURNS, P.C., ROULSTON, B.V., CURTIS, J.D. & JAMBOR, J.L. (1993): Pringleite and ruitenbergite, polymorphs of Ca9B26O34(OH)24Cl4$13H2O, two new mineral species from Sussex, New Brunswick. Canadian Mineralogist 31, 795-800. GRICE, J.D., BURNS, P.C. & HAWTHORNE, F.C. (1994): Determination of the megastructures of the borate polymorphs pringleite and ruitenbergite. Canadian Mineralogist 32, 1-14. ROULSTON, B.V. & WAUGH, D.C.E. (1981): A borate mineral assemblage from Penobsquis and Salt Springs evaporite deposits of southern New Brunswick. Canadian Mineralogist 19, 291-301.
      • Hammond Parish
        • Salt Springs evaporite deposit
BURNS, P.C., HAWTHORNE, F.C. & STIRLING, J.A.R. (1992): Trembathite, (Mg,Fe)3B7O13Cl, a new borate mineral from the Salt Springs potash deposit, Sussex, New Brunswick. Canadian Mineralogist 30, 445-448.
      • Studholm Parish
Grice, J.D., Gault, R.A., and Van Velthuizen, J. (2005) Borate Minerals of the Penobsquis and Millstream Deposits, Southern New Brunswick, Canada. Canadian Mineralogist: 43: 1469-1487.
Mineral and/or Locality  
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