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(Ba,Ca,K2)Al2Si6O16 · 6H2O
4 - 4½
Named after Horace Lemuel Wells (1855-1924), professor of chemistry, Yale University (Connecticut - USA).
Discredited - is either barian Phillipsite-Ca or calcian Harmotome.
Originally described from Buck Creek Mine (Cullakenee Mine), Buck Creek, Clay Co., North Carolina, USA.

Classification of Wellsite


16 : Silicates Containing Aluminum and other Metals
12 : Aluminosilicates of Sr, Ba and Zn

Physical Properties of Wellsite

Hardness (Mohs):
4 - 4½

Optical Data of Wellsite

Biaxial (+)
RI values:
nα = 1.499 nβ = 1.501 nγ = 1.504
Max Birefringence:
δ = 0.005
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Wellsite

(Ba,Ca,K2)Al2Si6O16 · 6H2O
Elements listed in formula:
Common Impurities:

Crystallography of Wellsite

Crystal System:
Cell Parameters:
a = 9.91 Å, b = 14.24 Å, c = 8.7 Å
β = 124.65°
a:b:c = 0.696 : 1 : 0.611
Unit Cell Volume:
V 1,009.98 ų (Calculated from Unit Cell)

Relationship of Wellsite to other Species

16.12.6CymriteBaAl2Si2(O,OH)8 · H2O
16.12.7EdingtoniteBa[Al2Si3O10] · 4H2O
16.12.9Harmotome(Ba0.5,Ca0.5,K,Na)5[Al5Si11O32] · 12H2O
16.12.12ArmeniteBaCa2Al6Si9O30 · 2H2O
16.12.14Merlinoite(K,Na)5(Ca,Ba)2Al9Si23O64 · 23H2O
16.12.17SauconiteNa0.3Zn3((Si,Al)4O10)(OH)2 · 4H2O

Other Names for Wellsite

Name in Other Languages:

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 Wellsite

Reference List:
American Journal of Science (1897): 153: 443.

Can. Mineral. 35 (1997) 1571

Mineralogical Magazine (1998): 62: 571.

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

Localities for Wellsite

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.
  • Burgenland
    • Güssing
Natural History Museum Vienna collection; Taucher, J. & Hollerer, Chr. (1993)
  • Carinthia
    • St Paul im Lavanttal
      • Kollnitz
G. Niedermayr, I. Praetzel: Mineralien Kärntens, 1995
  • Lower Austria
    • Waldviertel
      • Persenbeug-Gottsdorf
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Ústí Region
      • Litoměřice
M.Radoň-Významné mineralogické lokality Českého středohoří (čas.Minerál 2/2009)
  • Moravia (Mähren; Maehren)
    • Vysočina Region
      • Žďár nad Sázavou
        • Věžná
Canadian Mineralogist, Vol 17, 1979, pp. 583-588.; Cerny, P., Hawthorne, F. C., Laflamme, J. H. G., & Hinthorne, J. (1979). Stibiobetafite, a new member of the pyrochlore group from Vezna, Czechoslovakia. Canadian Mineralogist, 17, 583-588.
Petr Pauliš (2001): Nejzajímavější mineralogická naleziště Moravy a Slezska. Kuttna, Kutná Hora.; Mineralogical Magazine 1963 33 : 450-457
  • Auvergne-Rhône-Alpes
    • Ardèche
      • Privas
Ch. Robert : "Barian phillipsite and strontian chabazite from the Plateau des Coirons, Ardèche, France", Bull. Minéral., 1988, 111, pp. 671-677, France.
      • Villeneuve-de-Berg
Ch. Robert : "Barian phillipsite and strontian chabazite from the Plateau des Coirons, Ardèche, France", Bull. Minéral., 1988, 111, pp. 671-677, France.
  • Hesse
    • Vogelsberg
      • Ortenberg
  • Veneto
    • Verona Province
      • Roncà
Galli E. (1972) - La phillipsite barifera ("wellsite") di M. Calvarina (Verona). Periodico di mineralogia – Roma pp. 23-33
  • Northern Ireland
    • Co. Antrim
Adair, I. (1986) pers. comm.; Ryback, G., Nawaz, R. and Farley, E. (1988) Seventh Supplementary List of British Isles Minerals (Irish). Mineralogical Magazine, vol. 52, n° 365, pp. 267-274.
  • Crimea Oblast'
World of Stones v.9
    • Simferopol area
      • Petropavlovka Village area
A. Tischenko. Minerals of the Crimea - World of stones, 1996, #9, p. 9-18
      • Ukrainka Village area (Kurtsy)
- Dvoichenko P.A. The minerals of Crimea (1914) - Zapiski Krymskogo obshchestva estestvoispytatelei (Proceeding of the Crimea Society of Naturalistes), 1914, vol. 4, p. 1-208 (Rus.) - Popov S.P. Mineralogy of the Crimea (1938). - M.-L., AN SSSR, 1938, 352 p. (Rus.)
  • California
    • Trinity Co.
      • Coastal Range
        • Mad River Rock
Pemberton, H. Earl (1983), Minerals of California; Van Nostrand Reinholt Press: 383;; Tony Kampf (PXRD analysis)
  • Colorado
    • Mineral Co.
      • San Juan Mts
        • Wolf Creek Pass
Rocks & Minerals 79:5 pp316-324
  • North Carolina
    • Clay Co.
      • Buck Creek
Pratt,Joseph Hyde, and Foote,H.W.,1897,On Wellsite ,A New Mineral(Clay County,North Carolina,American Journal Of Science,Series 4,Vol 3.June 1897,P.443-448
  • Oregon
    • Clackamas Co.
Miklancic collection #1742/77
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