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KBa2Ti2(Si5Al)O18 · nH2O
3 - 4
This page provides mineralogical data about Jonesite.

Classification of Jonesite


9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains

61 : CYCLOSILICATES Six-Membered Rings
2 : Six-Membered Rings with Al substituted rings

16 : Silicates Containing Aluminum and other Metals
14 : Aluminosilicates of Ti, Zr, Sn and Pb

Physical Properties of Jonesite

Hardness (Mohs):
3 - 4

Optical Data of Jonesite

Biaxial (+)
RI values:
nα = 1.641 nβ = 1.660 nγ = 1.682
Max Birefringence:
δ = 0.041
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:
relatively weak

Chemical Properties of Jonesite

IMA Formula:
KBa2Ti2(Si5Al)O18 · nH2O
Elements listed in formula:
Common Impurities:

Crystallography of Jonesite

Crystal System:
Cell Parameters:
a = 13.73 Å, b = 25.9 Å, c = 10.6 Å
a:b:c = 0.53 : 1 : 0.409
Unit Cell Volume:
V 3,769.43 ų (Calculated from Unit Cell)

Type Occurrence of Jonesite

Relationship of Jonesite to other Species

9.DJ.10Laplandite-(Ce)Na4CeTiPSi7O22 · 5H2O
9.DJ.15Caysichite-(Y)(Ca,Yb,Er)4Y4Si8O20(CO3)6(OH) · 7H2O
9.DJ.20Seidite-(Ce)Na4(Ce,Sr)2TiSi8O18(O,OH,F)6 · 5H2O
9.DJ.25Carlosturanite(Mg,Fe2+,Ti)21(Si,Al)12O28(OH)34 · H2O
16.14.1ZoriteNa6Ti5Si12O34(O,OH)5 · 11H2O
16.14.2VinogradoviteNa4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3
16.14.8Labuntsovite-MnNa4K4Mn22+Ti8O4(Si4O12)4(OH)4 · 10-12H2O
16.14.11Carlosturanite(Mg,Fe2+,Ti)21(Si,Al)12O28(OH)34 · H2O
16.14.12EakeriteCa2Sn4+Al2Si6O18(OH)2 · 2H2O
16.14.14WickenburgitePb3CaAl2Si10O27 · 4H2O
16.14.15MaricopaiteCa2Pb7(Si36Al12)O99 · n(H2O,OH)

Other Names for Jonesite

Name in Other Languages:

Other Information

Orange yellow in SW; weak orange yellow in LW
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 Jonesite

Reference List:
Wise, W.S. and Pabst, A. (1977) Jonesite: a new mineral from the benitoite gem mine, San Benito County, California. Mineralogical Record: 8: 455-456.

Internet Links for Jonesite URL:
Please feel free to link to this page.

Localities for Jonesite

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.
(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.
Atlantic Ocean
  • Mid-Atlantic Ridge complex
Gablina, I.F., Semkova, T.A., Stepanova, T.V., and Gor'kova, N.V. (2006): Lithology and Mineral Resources 41(1), 27-44.
  • Prešov Region
    • Vranov nad Topľou Co.
Ďuďa,R., et al., 1981: Mineralógia severnej časti Slanských vrchov. Min.Slovaca, Monografia 2, 98s
  • California
    • San Benito Co.
      • Diablo Range
        • New Idria District
          • San Benito River headwaters area
            • Dallas Gem Mine area
Wise, W.S & Gill, R.H. (1977): Minerals of the Benitoite Gem mine. The Mineralogical Record 8, 442-452; Wise, W.S. & Pabst, A. (1977): Jonesite a new mineral from the Benitoite Gem mine, San Benito County, California. The Mineralogical Record 8, 453-456; Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 472.
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