SUPPORT US. Covid-19 has significantly affected our fundraising. Please help!
Log InRegister
Home PageAbout MindatThe Mindat ManualHistory of MindatCopyright StatusWho We AreContact UsAdvertise on Mindat
Donate to MindatCorporate SponsorshipSponsor a PageSponsored PagesMindat AdvertisersAdvertise on Mindat
Learning CenterWhat is a mineral?The most common minerals on earthInformation for EducatorsMindat ArticlesThe ElementsBooks & Magazines
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralRandom LocalitySearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
Mining CompaniesStatisticsUsersMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day GalleryMineral Photography


This page is currently not sponsored. Click here to sponsor this page.
Hide all sections | Show all sections

About SantiteHide

Giorgio G. Santi
K[B5O6(OH)4] · 2H2O
Crystal System:
Member of:
Named in honor of Giorgio Galgano Santi (15 April 1746, Montieri, Tuscany, Italy - 30 December 1823, Pienza, Tuscany, Italy), naturalist, Professor of Natural Sciences in Pisa, and director of the Museum of Natural History, Pisa.
This page provides mineralogical data about Santite.

Classification of SantiteHide

First Published:

E : Pentaborates
A : Neso-pentaborates

5 : Pentaborates

9 : Borates
1 : Borates of the alkalis and boric acid

Physical Properties of SantiteHide


Optical Data of SantiteHide

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:
relatively strong

Chemical Properties of SantiteHide

K[B5O6(OH)4] · 2H2O
IMA Formula:
KB5O6(OH)4 · 2H2O

Crystallography of SantiteHide

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

Crystal StructureHide

Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
CIF File    Best | x | y | z | a | b | c
Stop | Start
Console Off | On | Grey | Yellow
IDSpeciesReferenceLinkYearLocalityPressure (GPa)Temp (K)
0010569SantiteZachariasen W H (1937) The crystal structure of potassium acid dihydronium pentaborate KH2(H3O)2B5O10, (potassium pentaborate tetrahydrate) Zeitschrift fur Kristallographie 98 266-2741937synthetic0293
0018018SantiteZachariasen W (1938) The crystal structure of potassium acid dihydronium pentaborate K H2 (H3 O)2 B5 O10, (potassium pentaborate tetrahydrate) _cod_database_code 1011124 Zeitschrift fur Kristallographie 98 266-27419380293
CIF Raw Data - click here to close

Type Occurrence of SantiteHide

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

Synonyms of SantiteHide

Other Language Names for SantiteHide


Relationship of Santite to other SpeciesHide

Member of:
Other Members of this group:
SborgiteNa[B5O6(OH)4] · 3H2OMon.
Structurally related to group(s):

Common AssociatesHide

Associated Minerals Based on Photo Data:
1 photo of Santite associated with ThénarditeNa2SO4

Related Minerals - Nickel-Strunz GroupingHide

6.EA.05SborgiteNa[B5O6(OH)4] · 3H2OMon.
6.EA.05LeucostauritePb2[B5O9]Cl · 0.5H2OOrth. mm2 : Pnn2
6.EA.10Ramanite-(Rb)Rb[B5O6(OH)4] · 2H2OOrth. mm2 : Aba2
6.EA.10Ramanite-(Cs)Cs[B5O6(OH)4] · 2H2OMon. 2/m : B2/b
6.EA.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2OMon. 2/m : B2/b
6.EA.25UlexiteNaCa[B5O6(OH)6] · 5H2OTric. 1 : P1

Related Minerals - Dana Grouping (8th Ed.)Hide[B5O6(OH)4] · 2H2OOrth. mm2 : Aba2[B5O6(OH)4] · 2H2OMon. 2/m : B2/b

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

9.1.1SassoliteH3BO3Tric. 1 : P1
9.1.4BiringucciteNa2B5O8(OH) · H2OMon.
9.1.5NasiniteNa2[B5O8(OH)] · 2H2OOrth.
9.1.6KerniteNa2[B4O6(OH)2] · 3H2OMon. 2/m : P2/b
9.1.7EzcurriteNa4B10O17 · 7H2OTric. 1 : P1
9.1.8TincalconiteNa2(B4O7) · 5H2OTrig. 3 2 : R3 2
9.1.9BoraxNa2(B4O5)(OH)4 · 8H2OMon. 2/m : B2/b
9.1.11SborgiteNa[B5O6(OH)4] · 3H2OMon.
9.1.12AristarainiteNa2MgB12O20 · 8H2OMon. 2/m : P21/b
9.1.14Larderellite(NH4)B5O7(OH)2 · H2OMon.
9.1.15Ammonioborite(NH4)2[B5O6(OH)4]2 · H2OMon. 2/m : B2/b
9.1.16Rhodizite(K,Cs)Al4Be4(B,Be)12O28Iso. 4 3m : P4 3m

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 SantiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Merlino, S., Sartori, F. (1970) Santite, a New Mineral Phase from Larderello, Tuscany. Contributions to Mineralogy and Petrology: 27: 159-165.
Fleischer, M. (1971) New mineral names. American Mineralogist: 56: 631-640.
Zachariasen, W.H. (1937) The crystal structure of potassium acid dihydronium pentaborate KH2(H3O)2B5O10, (potassium pentaborate tetrahydrate). 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 SantiteHide

Localities for SantiteHide

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.
  • 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.
  • Aktobe Region
    • Shalkar
      • Aksai Valley
Коротченкова, О. В., & Чайковский, И. И. (2016). БОРНЫЕ МИНЕРАЛЫ ЧЕЛКАРСКОГО МЕСТОРОЖДЕНИЯ. Проблемы минералогии, петрографии и металлогении. Научные чтения памяти ПН Чирвинского, (19), 55-65.
  • California
    • Inyo Co.
      • Death Valley
Crowley, J.K. (1996) Mg- and K-bearing borates and associated evaporites at Eagle Borax Spring, Death Valley, California; a spectroscopic exploration. Economic Geology: 91: 622-635.
Mineral and/or Locality is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization. Public Relations by Blytheweigh.
Copyright © and the Hudson Institute of Mineralogy 1993-2020, except where stated. Most political location boundaries are © OpenStreetMap contributors. relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: August 10, 2020 09:36:01 Page generated: July 27, 2020 06:08:37
Go to top of page