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Santarosaite

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Formula:
CuB2O4
System:
Tetragonal
Colour:
vivid blue
Name:
For the type locality, Santa Rosa Mine, Iquique, Chile
The natural analogue of copper metaborate.

Classification of Santarosaite

Approved 2007
6.BD.05

6 : BORATES
B : Diborates
D : Tektodiborates with tetrahedra
24.5.5.

24 : ANHYDROUS BORATES
5 : Miscellaneous
mindat.org URL:
http://www.mindat.org/min-29030.html
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First Recorded Occurrence of Santarosaite

General Appearance of First Recorded Material:
globules to 60 microns in size
Place of Conservation of First Recorded Material:
Mineralogical Museum of the University of Hamburg, Germany
Year of Discovery:
2003
Associated Minerals at First Recorded Locality:

Physical Properties of Santarosaite

Vitreous
Colour:
vivid blue
Streak:
pale blue
Density:
3.96 g/cm3 (Calculated)

Crystallography of Santarosaite

Crystal System:
Tetragonal
Class (H-M):
4 2m - Scalenohedral
Space Group:
I4 2d
Cell Parameters:
a = 11.517(8) Å, c = 5.632(6) Å
Ratio:
a:c = 1 : 0.489
Unit Cell Volume:
V 747.1 ų
Z:
12
Morphology:
globular aggregates of tiny leaf-like crystallites less than 1 micron thick.
X-Ray Powder Diffraction Data:
d-spacingIntensity
3.707 (100)
3.638 (47)
2.876 (17)
2.775 (35)
2.572 (26)
2.501 (26)
1.822 (21)
1.793 (20)

Chemical Properties of Santarosaite

Formula:
CuB2O4
All elements listed in formula:
Analytical Data:
Average of 15 analyses (electron microprobe). The low total is assumed to originate from structural reasons (the very small size of the crystallites) and not "analytical failures".
CuO (43.24)
PbO (4.48)
CaO (0.97)
B203 (45.44)
Total (94.13)
Common Impurities:
Pb,Ca

Other Names for Santarosaite

Name in Other Languages:
Simplified Chinese:硼铜石

Other Information

Other Information:
not soluble in water, but in HCl
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 Santarosaite

Reference List:
Schlüter, J., Pohl, D., Golla-Schindler, U. (2008): Santarosaite, CuB2O4, a new mineral with disordered structure from the Santa Rosa mine, Atacama desert, Chile. Neues Jahrbuch für Mineralogie - Abhandlungen, 185, 27-32.

Internet Links for Santarosaite

Localities for Santarosaite

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.
Chile
 
  • Tarapacá Region
    • Iquique Province
      • Santa Rosa-Huantajaya District
Schlüter, J., Pohl, D., Golla-Schindler, U. (2008): Santarosaite, CuB2O4, a new mineral with disordered structure from the Santa Rosa mine, Atacama desert, Chile. Neues Jahrbuch für Mineralogie - Abhandlungen, 185, 27-32.
Mineral and/or Locality  
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