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About SanborniteHide

Colourless to white
Crystal System:
Named after Frank Sanborn, mineralogist, California Division of Mines, San Francisco, California, USA.
This page provides mineralogical data about Sanbornite.

Classification of SanborniteHide

Approved, 'Grandfathered' (first described prior to 1959)

9 : SILICATES (Germanates)
E : Phyllosilicates
F : Single nets with 6-membered rings, connected by M[4], M[8], etc.

74 : PHYLLOSILICATES Modulated Layers
3 : Modulated Layers with joined strips

14 : Silicates not Containing Aluminum
7 : Silicates of Ba, Sr and Zn

Physical Properties of SanborniteHide

Transparent, Translucent
Colourless to white

Optical Data of SanborniteHide

Biaxial (-)
RI values:
nα = 1.597 nβ = 1.616 nγ = 1.624
Measured: 66° , Calculated: 64°
Max Birefringence:
δ = 0.027
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
r < v weak

Chemical Properties of SanborniteHide

IMA Formula:
Common Impurities:

Crystallography of SanborniteHide

Crystal System:
Cell Parameters:
a = 4.62 Å, b = 7.68 Å, c = 13.52 Å
a:b:c = 0.602 : 1 : 1.76
Unit Cell V:
479.71 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 SanborniteHide

Other Language Names for SanborniteHide

Simplified Chinese:硅钡石
Traditional Chinese:矽鋇石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Gillespite43 photos of Sanbornite associated with Gillespite on mindat.org.
Titantaramellite16 photos of Sanbornite associated with Titantaramellite on mindat.org.
Quartz8 photos of Sanbornite associated with Quartz on mindat.org.
Walstromite6 photos of Sanbornite associated with Walstromite on mindat.org.
Celsian6 photos of Sanbornite associated with Celsian on mindat.org.
Kampfite5 photos of Sanbornite associated with Kampfite on mindat.org.
Pyrrhotite4 photos of Sanbornite associated with Pyrrhotite on mindat.org.
Cerchiaraite-(Fe)4 photos of Sanbornite associated with Cerchiaraite-(Fe) on mindat.org.
Taramellite3 photos of Sanbornite associated with Taramellite on mindat.org.
Linarite3 photos of Sanbornite associated with Linarite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

9.EF.05PetaliteLiAl(Si4O10)Mon. 2/m : P2/b
9.EF.15SearlesiteNa(H2BSi2O7)Mon. 2 : P21
9.EF.20SilinaiteNaLiSi2O5 · 2H2OMon. 2/m
9.EF.25KanemiteHNaSi2O5 · 3H2OOrth. mmm (2/m 2/m 2/m) : Pnma
9.EF.30Yakovenchukite-(Y)K3NaCaY2[Si12O30] · 4H2OOrth. mmm (2/m 2/m 2/m) : Pcca

Related Minerals - Dana Grouping (8th Ed.)Hide · 3H2OMon.,K)2CaTi2Si10O26 · 8H2OMon. 2/m : B2/m

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

14.7.2KrauskopfiteBaSi2O5 · 3H2OMon.
14.7.4MacdonalditeBaCa4Si16O36(OH)2 · 10H2OOrth.
14.7.5EricssoniteBaMn2+2Fe3+(Si2O7)O(OH)Mon. 2/m : B2/m
14.7.11WillemiteZn2SiO4Trig. 3 : R3
14.7.12HemimorphiteZn4Si2O7(OH)2 · H2OOrth. mm2 : Imm2
14.7.13ZincsiliteZn3(Si4O10)(OH)2 · 4H2OMon.
14.7.14HardystoniteCa2Zn(Si2O7)Tet. 4 2m : P4 21m
14.7.16ClinohedriteCaZn(SiO4) · H2OMon. m : Bb
14.7.17JunitoiteCaZn2Si2O7 · H2OOrth. mm2
14.7.18LarsenitePbZnSiO4Orth. mm2 : Pna21
14.7.19EsperitePbCa2Zn3(SiO4)3Mon. 2/m : P21/b
14.7.22GageiteMn21(Si4O12)2O3(OH)20Mon. 2/m
14.7.23FranklinfurnaceiteCa2Fe3+Mn2+3Mn3+(Zn2Si2O10)(OH)8Mon. 2 : B2

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 SanborniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Rogers, A.F. (1932) Sanbornite, a new barium silicate mineral from Mariposa County, California. American Mineralogist: 17: 161-172.
Bradley, W.W. (1932), Sanbornite, a newly described mineral from California, CA Min. Bur. Rept. 28: 82-83.
Douglass, R.M. (1954), Crystal structure of sanbornite (abstract): Geological Society of America Bull.: 65: 1246.
Douglass, R.M. (1958), The crystal structure of sanbornite, BaSi2O5: American Mineralogist: 43: 517-536.
Hesse, K.-F. (1980) Crystal chemistry of silica-rich barium silicates. III: refinement of the crystal structures of the layer silicates Ba2[Si4O10] (I), (sanbornite), and Ba2[Si4O10] (h). Zeitschrift für Kristallographie (1980): 153: 33-41.

Internet Links for SanborniteHide

Localities for SanborniteHide

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.
  • Nunavut
    • Baffin Island
      • Kimmirut (Lake Harbour)
  • Québec
    • Nord-du-Québec
      • Nunavik
Mitchell, R.H. & Smith, D.L. (2017) Geology and mineralogy of the Ashram zone carbonatite, Eldor complex, Quebec. Ore Geology Reviews 86, 784-806.
  • Yukon
    • Watson Lake mining district
      • Itsi Mt.
        • Wilson Lake
Canadian Mineralogist:11:444; Alfors, J.T. & Pabst, A. (1984): Titanian taramellites in western North America, American Mineralogist, 69, 358-373.
  • Baja California
    • Mun. de Ensenada
No reference listed
    • Tres Pozos
Canadian Mineralogist22:653-658; American Mineralogist, Volume 69, pages 358-373, 1984
  • Silesia
    • Upper Silesian Coal Basin
      • Rybnik Coal Area
        • Rybnik
          • Jankowice
Ł. Kruszewski EPMA data (publication in progress)
Republic of Macedonia
  • Veles
V. Bermanec et al. : "Zn-rich magnetoplumbite from Nezilovo, Macedonia", Eur. Journ. Mineral., 1993, 5, pp 957-960
      • Jakupica Mts
        • Babuna Valley
Chukanov, Nikita V., Jančev, Simeon., Pekov, Igor V. (2015): The association of Oxygen-bearing minerals of the chalcophile elements in the orogenetic zone related to the “mixed series” complex near Nežilovo, Republic of Macedonia. Macedonian Journal of Chemistry and Chemical Engineering, Vol. 34, No. 1, pp. 115–124
  • California
    • Fresno Co.
      • Big Creek-Rush Creek District
        • Rush Creek deposit
Anonymous (1963), Core drilling at Rush Creek completed: California Division Mines, Mineral Information Service: 16(1): 11; Stinson, Melvin Clarence & J.T. Alfors (1964), New minerals from Fresno County – I: California Division Mines & Geology Mineral Information Service.: 17: 235-238; Murdoch, Joseph & Robert W. Webb (1966), Minerals of California, Centennial Volume (1866-1966): California Division Mines & Geology Bulletin 189: 359, 381.
[MinRec 33:161]; American Mineralogist (1981), Volume 66, pages 1050-1053
Bob Walstrom, p.c.
          • Rush Creek
Mineralogical Record (2002) 33: 163.; Jambor, J.L. and Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 765-768.
Marek Patus
    • Mariposa Co.
      • East Belt
        • Clearing House District
          • Clearing House
            • Trumbull Peak
Rogers, A.F. (1932) Sanbornite, a new barium silicate mineral from Maricopa County, California. American Mineralogist: 17: 171.; Matthews, R.A. and Alfors, J.T. (1962) Sanbornite from Rush Creek, Fresno County. California Division Mines & Geology Mineral Information Service: 15(6): 1-3.; Murdoch, J. and Webb, R.W. (1966) Minerals of California, Centennial Volume (1866-1966). California Division Mines & Geology Bulletin 189: 359, 385.; American Mineralogist (1981) 66: 1050-1053.; Canadian Mineralogist (1984) 22: 653-658.; Dunning, G.E. and Cooper, J.F. (1999) Barium silicate minerals from Trumbull Peak, Mariposa County, California. Mineralogical Record: 30(6): 411-417.; Jambor, J.L. and Roberts, A.C. (2002) New mineral names. American Mineralogist: 87: 765-768.
    • Tulare Co.
      • Dumtah
Pabst, Adolf (1978) Zur morphologie des taramellits. Tschermaks Mineralogische und Petrographische Mitteilungen: 25: 248; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 464, 466; American Mineralogist (1984): 69: 358-373.; Mineralogical Record: 34(2): 159-166
Mineral and/or Locality  
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