Jonesite
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About Jonesite
Formula:
Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
Colour:
Colorless
Hardness:
3 - 4
Specific Gravity:
3.25
Crystal System:
Orthorhombic
Name:
Named in honor of Francis Tucker Jones (17 Jan 1905, Rocklin, California, USA - 24 September 1993, Richmond, California, USA), professor of chemistry at Pacific University, Forest Grove, Oregon and later chemical microscopist with the U.S. Department of Agriculture. He discovered the mineral.
This page provides mineralogical data about Jonesite.
Classification of Jonesite
Approved
First Published:
1977
8/E.03-10
9.DJ.30
9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains
9 : SILICATES (Germanates)
D : Inosilicates
J : Inosilicates with 4-periodic double and triple chains
61.2.2.1
61 : CYCLOSILICATES Six-Membered Rings
2 : Six-Membered Rings with Al substituted rings
61 : CYCLOSILICATES Six-Membered Rings
2 : Six-Membered Rings with Al substituted rings
16.14.6
16 : Silicates Containing Aluminum and other Metals
14 : Aluminosilicates of Ti, Zr, Sn and Pb
16 : Silicates Containing Aluminum and other Metals
14 : Aluminosilicates of Ti, Zr, Sn and Pb
Physical Properties of Jonesite
Colour:
Colorless
Hardness:
3 - 4 on Mohs scale
Cleavage:
Distinct/Good
{010}
{010}
Density:
3.25 g/cm3 (Measured) 3.239 g/cm3 (Calculated)
Optical Data of Jonesite
Type:
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.
and does not take into account mineral colouration.
Surface Relief:
Moderate
Dispersion:
relatively weak
Chemical Properties of Jonesite
Formula:
Ba4(K,Na)2Ti4Al2(Si3O9)2(SiO4)4O2 · 6H2O
IMA Formula:
KBa2Ti2(Si5Al)O18 · nH2O
Common Impurities:
B,Fe,Nb,Mn,Mg,Ca,Sr
Crystallography of Jonesite
Crystal System:
Orthorhombic
Cell Parameters:
a = 13.73 Å, b = 25.9 Å, c = 10.6 Å
Ratio:
a:b:c = 0.53 : 1 : 0.409
Unit Cell V:
3,769.43 ų (Calculated from Unit Cell)
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0003405 | Jonesite | Krivovichev S V, Armbruster T (2004) The crystal structure of jonesite, Ba2(K,Na)[Ti2(Si5Al)O18(H2O)](H2O)n: A first example of titanosilicate with porous double layers American Mineralogist 89 314-318 | ![]() | 2004 | Benitoite mine, New Idria District, San Benito Co., California, USA | 0 | 293 |
CIF Raw Data - click here to close
Type Occurrence of Jonesite
General Appearance of Type Material:
Rosettes of bladed crystals
Place of Conservation of Type Material:
University of California, Santa Barbara, California, 7325.
American Museum of Natural History, New York, New York, USA.
American Museum of Natural History, New York, New York, USA.
Reference:
Wise, W.S., Pabst, A., Hinthorne, J.R. (1977) Jonesite a new mineral from the Benitoite Gem mine, San Benito County, California. The Mineralogical Record: 8: 453-456.
Synonyms of Jonesite
Other Language Names for Jonesite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Nickel-Strunz Grouping
9.DJ.05 | Narsarsukite | Na4(Ti,Fe)2[Si8O20](O,OH,F)2 | Tet. |
9.DJ.10 | Laplandite-(Ce) | Na4CeTiPO4Si7O18 · 5H2O | Orth. mmm (2/m 2/m 2/m) : Pmmm |
9.DJ.15 | Caysichite-(Y) | Ca2Y2Si4O10(CO3)3 · 4H2O | Orth. mm2 |
9.DJ.20 | Seidite-(Ce) | Na4(Ce,Sr)2[TiSi8O18(OH)2](O,OH,F)4 · 5H2O | Mon. |
9.DJ.25 | Carlosturanite | (Mg,Fe,Ti)21(Si,Al)12O28(OH)34 · H2O | Mon. m : Bm |
Related Minerals - Hey's Chemical Index of Minerals Grouping
16.14.1 | Zorite | Na8(Ti,Nb)5(Si6O17)2(OH,O)5 · 14H2O | Orth. |
16.14.2 | Vinogradovite | Na4Ti4(Si2O6)2[(Si,Al)4O10]O4 · (H2O,Na,K)3 | Mon. 2/m : B2/b |
16.14.3 | Rhönite | Ca4[Mg8Fe3+2Ti2]O4[Si6Al6O36] | Tric. 1 : P1 |
16.14.4 | Kaersutite | NaCa2(Mg3AlTi4+)(Si6Al2)O22O2 | Mon. |
16.14.5 | Ferro-kaersutite | NaCa2{Fe2+3AlTi}(Si6Al2O22)O2 | Mon. |
16.14.7 | Lourenswalsite | (K,Ba)2(Ti,Mg,Ca,Fe)4(Si,Al,Fe)6O14(OH)12 | Hex. |
16.14.8 | Labuntsovite-Mn | Na4K4(Ba,K)2Mn2+(Ti,Nb)8(Si4O12)4(O,OH)8 · 10-12H2O | Mon. 2/m : B2/m |
16.14.9 | Kimzeyite | Ca3Zr2(SiO4)(AlO4)2 | Iso. |
16.14.10 | Ellenbergerite | Mg6(Mg,Ti,Zr,◻)2(Al,Mg)6Si8O28(OH)10 | Hex. |
16.14.11 | Carlosturanite | (Mg,Fe,Ti)21(Si,Al)12O28(OH)34 · H2O | Mon. m : Bm |
16.14.12 | Eakerite | Ca2SnAl2Si6O18(OH)2 · 2H2O | Mon. |
16.14.13 | Plumalsite | Pb4Al2(SiO3)7 | |
16.14.14 | Wickenburgite | CaPb3Al2Si10O24(OH)6 | Trig. 3m : P3 1c |
16.14.15 | Maricopaite | Pb7Ca2(Si,Al)48O100 · 32H2O | Orth. |
16.14.16 | Hancockite | {CaPb}{Al2Fe3+}(Si2O7)(SiO4)O(OH) | Mon. |
16.14.17 | Burckhardtite | Pb2(Fe3+Te6+)[AlSi3O8]O6 | Trig. 3m (3 2/m) : P3 1m |
16.14.18 | Mathewrogersite | Pb7FeAl3GeSi12O36(OH,H2O)6 | Trig. |
Fluorescence of Jonesite
Orange yellow in SW; weak orange yellow in LW
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 Jonesite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Jones, F.T. (1971) A new mineral from the Gem mine, San Benito County, California - a progress report. Mineralogical Record: 2: 191-192.
Wise, W.S., Pabst, A. (1977) Jonesite: a new mineral from the benitoite gem mine, San Benito County, California. Mineralogical Record: 8: 455-456.
Krivovichev, S.V., Armbruster, T. (2004) The crystal structure of jonesite, Ba2(K,Na)[Ti2(Si5Al)O18(H2O)](H2O)n: a first example of titanosilicate with porous double layers. American Mineralogist: 89: 314-318.
Internet Links for Jonesite
mindat.org URL:
https://www.mindat.org/min-2112.html
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Localities for Jonesite
Locality List




All localities listed without proper references should be considered as questionable.
Atlantic Ocean | |
| Gablina, I.F., Semkova, T.A., Stepanova, T.V., and Gor'kova, N.V. (2006): Lithology and Mineral Resources 41(1), 27-44. |
Slovakia | |
| Ďuďa,R., et al., 1981: Mineralógia severnej časti Slanských vrchov. Min.Slovaca, Monografia 2, 98s |
USA (TL) | |
| 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. |
California State Gem Mine, Santa Rita Peak, New Idria Mining District, San Benito Co., California, USA