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Braitschite-(Ce)

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About Braitschite-(Ce)Hide

Formula:
(Ca,Na2)7(Ce,La)2B22O43 · 7H2O
Formula based on the crystal structure refinement: Ca6.15Na0.85REE2.08[B6O7(OH)3(O,OH)3]4(H2O). It may thus be simplified as NaCa6(Ce,La)2[B6O7(OH)3(O,OH)3]4(H2O) (Rowland et al., 2011)
Colour:
Colorless to white
Lustre:
Vitreous
Specific Gravity:
2.903
Crystal System:
Hexagonal
Name:
Named by O.B. Raup, A.J. Gude, E.J. Dwornik, F. Cuttitta, and H.J. Rose in 1968 in honor of Otto Braitsch (17 December 1921 - 25 July 1966), professor at the University of Freiburg, Germany, for his contributions to evaporite mineralogy and geochemistry. The suffix follows IMA naming rules an indicates the dominant rare-earth element.

The name is pronounced brītsch'ite.
This page provides mineralogical data about Braitschite-(Ce).


Classification of Braitschite-(Ce)Hide

Approved
Approval Year:
1966
First Published:
1968
6.H0.10

6 : BORATES
H : Unclassified borates
0 :
26.7.6.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
7 : Miscellaneous
9.5.3

9 : Borates
5 : Borates of Al and rare earths

Physical Properties of Braitschite-(Ce)Hide

Vitreous
Colour:
Colorless to white
Density:
2.903(2) g/cm3 (Measured)    2.837 g/cm3 (Calculated)

Optical Data of Braitschite-(Ce)Hide

Type:
Uniaxial (+)
RI values:
nω = 1.646 nε = 1.647
Max Birefringence:
δ = 0.001
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Moderate

Chemical Properties of Braitschite-(Ce)Hide

Formula:
(Ca,Na2)7(Ce,La)2B22O43 · 7H2O

Formula based on the crystal structure refinement: Ca6.15Na0.85REE2.08[B6O7(OH)3(O,OH)3]4(H2O). It may thus be simplified as NaCa6(Ce,La)2[B6O7(OH)3(O,OH)3]4(H2O) (Rowland et al., 2011)
IMA Formula:
Ca6.15Na0.85REE2.08[B6O7(OH)3(O,OH)3]4 · H2O

Crystallography of Braitschite-(Ce)Hide

Crystal System:
Hexagonal
Cell Parameters:
a = 12.150 Å, c = 7.378 Å
Ratio:
a:c = 1 : 0.607
Unit Cell V:
943.24 ų (Calculated from Unit Cell)
Morphology:
Simple hexagonal plates, having only prism and pinacoid faces.

Type Occurrence of Braitschite-(Ce)Hide

General Appearance of Type Material:
Rounded nodules in anhydrite. The nodules are a mixture of minerals. The braitschite-(Ce) is minute hexagonal plates.
Place of Conservation of Type Material:
U. S. National Museum, Catalog Number 120627.
Geological Setting of Type Material:
Evaporite deposit
Associated Minerals at Type Locality:

Synonyms of Braitschite-(Ce)Hide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Anhydrite3 photos of Braitschite-(Ce) associated with Anhydrite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

6.H0.15SatimoliteKNa2(Al5Mg2)[B12O18(OH)12](OH)6Cl4·4H2OTrig. 3m (3 2/m) : R3m
6.H0.20IquiqueiteK3Na4Mg(CrO4)B24O39(OH) · 12H2OHex.
6.H0.25WardsmithiteCa5Mg[B4O7]6 · 30H2OHex.
6.H0.35HalurgiteMg2[B4O7]2 · 5H2OMon.
6.H0.40EkateriniteCa2(B4O7)(Cl,OH)2 · 2H2OHex.
6.H0.45VitimiteCa6[(OH)14|SO4|B14O19] · 5H2OMon.
6.H0.50CanavesiteMg2(HBO3)(CO3) · 5H2OMon.
6.H0.55QilianshaniteNaHCO3 · H3BO3 · 2H2OMon.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.5.2SinhaliteMgAl(BO4)Orth. mmm (2/m 2/m 2/m) : Pnma

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 Braitschite-(Ce)Hide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Raup, O.B., Gude, A.J., Dwornik, E.J., Cuttitta, F., Rose, H.J. (1968) Braitschite, a new hydrous calcium rare-earth borate mineral from the Paradox Basin, Grand County, Utah. American Mineralogist: 53: 1081-1095.
Nickel, E.H., Mandarino, J.A. (1987) Procedures involving the IMA Commission on New Minerals and Mineral Names and guidelines on mineral nomenclature. American Mineralogist: 72: 1031-1042.
Rowland, C.E., Cahill, C.L., Post, J.E. (2011) The structure of braitschite, a calcium rare earth borate. American Mineralogist: 96: 197-201.

Internet Links for Braitschite-(Ce)Hide

Localities for Braitschite-(Ce)Hide

ⓘ - 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.
USA (TL)
 
  • Utah
    • Grand Co.
      • Interriver District
Am Min 53:1081-1095
UGMS Bull 117 Minerals and Mineral Localities of Utah
Mineral and/or Locality  
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