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Santite

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Formula:
K[B5O6(OH)4] · 2H2O
System:
Orthorhombic
Colour:
Colourless
Name:
Named after Georgi Santi (1746-1823), Director of the Museum of Natural History, Italy.

Classification of Santite

Approved
6.EA.10

6 : BORATES
E : Pentaborates
A : Neso-pentaborates
26.5.2.1

26 : HYDRATED BORATES CONTAINING HYDROXYL OR HALOGEN
5 : Pentaborates
9.1.13

9 : Borates
1 : Borates of the alkalis and boric acid
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First Recorded Occurrence of Santite

Year of Discovery:
1970

Physical Properties of Santite

Vitreous
Colour:
Colourless

Crystallography of Santite

Crystal System:
Orthorhombic
Cell Parameters:
a = 11.1Å, b = 11.18Å, c = 9.08Å
Ratio:
a:b:c = 0.993 : 1 : 0.812
Unit Cell Volume:
V 1,126.81 ų (Calculated from Unit Cell)

Optical Data of Santite

Type:
Biaxial (+)
RI values:
nα = 1.422 nβ = 1.435 nγ = 1.480
Max Birefringence:
δ = 0.058
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively strong

Chemical Properties of Santite

Formula:
K[B5O6(OH)4] · 2H2O
Essential elements:
All elements listed in formula:

Relationship of Santite to other Species

Structurally related to group(s):
6.EA.05SborgiteNa[B5O6(OH)4] · 3H2O
6.EA.05LeucostauritePb2[B5O9]Cl · 0.5H2O
6.EA.10Ramanite-(Rb)Rb[B5O6(OH)4] · 2H2O
6.EA.10Ramanite-(Cs)Cs[B5O6(OH)4] · 2H2O
6.EA.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2O
6.EA.25UlexiteNaCa[B5O6(OH)6] · 5H2O
9.1.1SassoliteH3BO3
9.1.2MetaboriteHBO2
9.1.3DiomigniteLi2[B4O7]
9.1.4BiringucciteNa2B5O8(OH) · H2O
9.1.5NasiniteNa4B10O17 · 5H2O
9.1.6KerniteNa2[B4O6(OH)2] · 3H2O
9.1.7EzcurriteNa4B10O17 · 7H2O
9.1.8TincalconiteNa2(B4O7) · 5H2O
9.1.9BoraxNa2(B4O5)(OH)4 · 8H2O
9.1.10AmeghiniteNa(H4B3O7)
9.1.11SborgiteNa[B5O6(OH)4] · 3H2O
9.1.12AristarainiteNa2MgB12O20 · 8H2O
9.1.14Larderellite(NH4)B5O7(OH)2 · H2O
9.1.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2O
9.1.16Rhodizite(K,Cs)Al4Be4(B,Be)12O28

Other Names for Santite

Name in Other Languages:
German:Santit
Russian:Сантит
Spanish:Santita

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 Santite

Reference List:
Merlino, S., and Sartori, F. (1970): Santite, a New Mineral Phase from Larderello, Tuscany. Contributions to Mineralogy and Petrology 27, 159-165.

American Mineralogist (1971): 56: 636.

Zeitschrift für Kristallographie: 98: 266-274.

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

Internet Links for Santite

Localities for Santite

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.
Italy
 
  • Sicily
    • Messina Province
      • Eolie Islands (Aeolian Islands)
        • Lipari
          • Vulcano Island
Campostrini I. et al - Vulcano: ein aussergewohnlicher Fundpunkt von neuen und seltenen Mineralien - MineralienWelt 2010 - nr.3 - p.40-57
  • Tuscany
    • Pisa Province
      • Pomarance
Merlino, S., and Sartori, F. (1970): Santite, a New Mineral Phase from Larderello, Tuscany. Contributions to Mineralogy and Petrology 27, 159-165.
USA
 
  • California
    • Inyo Co.
      • Death Valley
Econ Geol (1996) 91:622-635
Mineral and/or Locality  
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