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Ca9B26O34(OH)24Cl4 · 13H2O
Colourless to orange, ...
3 - 4
After Arie Anne Ruitenberg (b. 1929), resident geologist for southern New Brunswick, Department of Natural Resources, Sussex, New Brunswick, Canada, for his contributions to the geology of New Brunswick.
Dimorph of:
The monoclinic dimorph of Pringleite.

Classification of Ruitenbergite


G : Heptaborates and other megaborates
D : Mega-tektoborates

5 : Pentaborates

Type Occurrence of Ruitenbergite

Physical Properties of Ruitenbergite

Diaphaneity (Transparency):
Colourless to orange, white, pale yellow
Hardness (Mohs):
3 - 4

Crystallography of Ruitenbergite

Crystal System:
Cell Parameters:
a = 19.88Å, b = 9.71Å, c = 17.55Å
β = 114.85°
a:b:c = 2.047 : 1 : 1.807
Unit Cell Volume:
V 3,074.09 ų (Calculated from Unit Cell)

Optical Data of Ruitenbergite

Biaxial (+)
RI values:
nα = 1.542 nβ = 1.545 nγ = 1.565
Measured: 42° to 47°, Calculated: 44°
Max Birefringence:
δ = 0.023
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Ruitenbergite

Ca9B26O34(OH)24Cl4 · 13H2O
Elements listed in formula:

Relationship of Ruitenbergite to other Species

6.GD.05PringleiteCa9B26O34(OH)24Cl4 · 13H2O

Other Names for Ruitenbergite

Name in Other Languages:

Other Information

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 Ruitenbergite

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

Internet Links for Ruitenbergite URL:
Please feel free to link to this page.

Localities for Ruitenbergite

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.
(TL) indicates type locality for a valid mineral species. (FRL) indicates first recorded locality for everything else. ? 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 (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.
      • 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.
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