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About GaudefroyiteHide

Christophe Gaudefroy
Crystal System:
Named in 1964 by Georges Jouravsky and François Permingeat in honor of Christophe Gaudefroy [1878-1971], French ecclesiastic and mineralogist.
This page provides mineralogical data about Gaudefroyite.

Classification of GaudefroyiteHide

Approval Year:

A : Monoborates
B : BO3, with additional anions; 1(D) + OH, etc.

1 : Miscellaneous

10 : Borates with other anions
4 : Borates with carbonate

Physical Properties of GaudefroyiteHide


Optical Data of GaudefroyiteHide

Uniaxial (+)
RI values:
nω = 1.805 - 1.810 nε = 2.015 - 2.020
Max Birefringence:
δ = 0.210
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High

Chemical Properties of GaudefroyiteHide

IMA Formula:

Crystallography of GaudefroyiteHide

Crystal System:
Cell Parameters:
a = 10.6 Å, c = 5.9 Å
a:c = 1 : 0.557
Unit Cell V:
574.11 ų (Calculated from Unit Cell)

X-Ray Powder DiffractionHide

Image Loading

Radiation - Copper Kα
Data Set:
Data courtesy of RRUFF project at University of Arizona, used with permission.

Type Occurrence of GaudefroyiteHide

Synonyms of GaudefroyiteHide

Other Language Names for GaudefroyiteHide

Simplified Chinese:碳硼锰钙石
Traditional Chinese:碳硼錳鈣石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Andradite75 photos of Gaudefroyite associated with Andradite on mindat.org.
Baryte33 photos of Gaudefroyite associated with Baryte on mindat.org.
Calcite22 photos of Gaudefroyite associated with Calcite on mindat.org.
Hausmannite21 photos of Gaudefroyite associated with Hausmannite on mindat.org.
Hematite15 photos of Gaudefroyite associated with Hematite on mindat.org.
Ettringite15 photos of Gaudefroyite associated with Ettringite on mindat.org.
Thaumasite6 photos of Gaudefroyite associated with Thaumasite on mindat.org.
Oyelite5 photos of Gaudefroyite associated with Oyelite on mindat.org.
Garnet Group3 photos of Gaudefroyite associated with Garnet Group on mindat.org.
Manganite3 photos of Gaudefroyite associated with Manganite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.AB.05HambergiteBe2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pbca
6.AB.10BerboriteBe2(BO3)(OH,F) · H2OTrig.
6.AB.15JeremejeviteAl6(BO3)5(F,OH)3Hex. 6/m : P63/m
6.AB.40BlatteriteSb5+(Mn3+,Fe3+)9(Mn2+,Mg)35(BO3)16O32Orth. mmm (2/m 2/m 2/m) : Pnnm
6.AB.45Aluminomagnesiohulsite(Mg,Fe2+)2(Al,Mg,Sn)(BO3)O2Mon. 2/m
6.AB.50HydroxylboriteMg3(BO3)(OH)3Hex. 6/m : P63/m
6.AB.55ShabyniteMg5(BO3)(OH)5(Cl,OH)2 · 4H2OMon.
6.AB.55WightmaniteMg5(BO3)O(OH)5 · 2H2OMon.
6.AB.65SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2ClIso. m3m (4/m 3 2/m) : Fd3m
6.AB.70HarkeriteCa12Mg4Al(BO3)3(SiO4)4(CO3)5 · H2OTrig. 3m (3 2/m) : R3m
6.AB.75Pertsevite-(F)Mg2(BO3)(F,OH)Orth. mm2 : Pna21
6.AB.75Pertsevite-(OH)Mg2(BO3)(OH)Orth. mmm (2/m 2/m 2/m) : Pnma
6.AB.80JacquesdietrichiteCu2(H2BO3)(OH)3Orth. mmm (2/m 2/m 2/m) : Pmna

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

10.4.1CanavesiteMg2(HBO3)(CO3) · 5H2OMon.
10.4.2CarboboriteCa2Mg[B(OH)4]2(CO3)2 · 4H2OMon.
10.4.4SakhaiteCa12Mg4(BO3)7(CO3)4(OH)2ClIso. m3m (4/m 3 2/m) : Fd3m
10.4.5Moydite-(Y)Y[B(OH)4](CO3)Orth. mmm (2/m 2/m 2/m) : Pbca

Other InformationHide

IR Spectrum:
Tachgagalt mine material [cm-1]: 1494s, 1219s, 1138, 1110, 937, 878w, 856, 795w, 764, 752w, 735sh, 724s, 663, 621s, 591s, 550sh, 470s, 408w
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 GaudefroyiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
American Mineralogy (1965): 50: 806.
Soviet Physics – Crystallography: 20: 87-88.
Grew, E.S., and Anovitz, L.M. (1996) BORON: Mineralogy, Petrology and Geochemistry, second edition, as revised (2002).
Chukanov, N.V. (2014): Infrared spectra of mineral species: Extended library. Springer (Springer Geochemistry/Mineralogy), vol. 1, Dordrecht, 1726 pp.

Internet Links for GaudefroyiteHide

Localities for GaudefroyiteHide

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.
  • Rhineland-Palatinate
    • Mayen-Koblenz
      • Mayen
        • Ettringen
          • Bellerberg volcano
Schäfer, Ch. (2016): Einige bemerkenswerte Funde vom Bellerberg-Vulkan bei Mayen, Der Aufschluß, Vol. 67 (1) , pp. 5-15
Morocco (TL)
  • Drâa-Tafilalet Region
    • Ouarzazate Province
Bull.Soc.fr.Min.Crist. 87 (1964), 216
South Africa
  • Northern Cape
    • Kalahari manganese field
      • Black Rock
      • Hotazel
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: an update. Mineralogical Record, 22(4), 279-302.; Beukes, N. J., Burger, A. M., & Gutzmer, J. (1995). Fault-controlled hydrothermal alteration of Palaeoproterozoic manganese ore in Wessels Mine, Kalahari manganese field. South African Journal of Geology, 98(4), 430-451.
      • Kuruman
        • N'Chwaning Mines
Von Bezing, K. L. et al. (1991) The Kalahari manganese field: an update. Mineralogical Record, 22(4), 279-302.
Cairncross, B., and Dixon, R., (1995) Minerals of South Africa. The Geological Society of South Africa, Linden 2014, RSA; Gutzmer, J. (1996). Genesis and alteration of the Kalahari and Postmasburg manganese deposits, Griqualand West, South Africa (Doctoral dissertation, Rand Afrikaans University); Cairncross, B., and Beukes, N. J., (2013) The Kalahari Manganese Field, the adventure continues. Struik Nature Publishers, Cape Town, South Africa
Mineral and/or Locality  
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