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About ParanatroliteHide

Na2Al2Si3O10 · 3H2O
Colourless, grey, pale yellow, pale pink
5 - 5½
Crystal System:
Named from the Greek 'para' for near, and natrolite for its close association with that mineral and the similarity in their chemical compositions.
Zeolite Group. Natrolite Subgroup.

Paranatrolite is another natrolite analog with a high water content (Chao 1980; Ross et al. 1992).
Paranatrolite is reported to transform to tetranatrolite upon exposure to the atmosphere after removal from its aqueous environment (Chao 1980; Lee et al. 2006; Seryotkin & Bakakin, 2007). This may happen within several hours (Postl, 1996, Taucher et al., 1989).

The dehydration of paranatrolite to tetranatrolite has been believed to be irreversible, but Seryotkin & Bakakin (2007) showed that it can be reversible. Paranatrolite to tetranatrolite transformation is also reversible through pressure-induced hydration. Paranatrolite is indeed a distinct mineral species, which can be formed at high pressure either from natrolite or tetranatrolite with a stability field that varies with composition (Lee et al. 2006).

Classification of ParanatroliteHide

First Published:

9 : SILICATES (Germanates)
G : Tektosilicates with zeolitic H2O; zeolite family
A : Zeolites with T5O10 Units – The Fibrous Zeolites

1 : Zeolite group - True zeolites

16 : Silicates Containing Aluminum and other Metals
2 : Aluminosilicates of Na

Physical Properties of ParanatroliteHide

Colourless, grey, pale yellow, pale pink
5 - 5½ on Mohs scale

Chemical Properties of ParanatroliteHide

Na2Al2Si3O10 · 3H2O
IMA Formula:
Na2(Si3Al2)O10 · 3H2O
Common Impurities:

Crystallography of ParanatroliteHide

Crystal System:
Class (H-M):
m - Domatic
Space Group:
Cell Parameters:
a = 18.971(4) Å, b = 19.204(3) Å, c = 6.5952(12) Å
β = 91.601°
a:b:c = 0.988 : 1 : 0.343
Unit Cell V:
2401.7 ų

Type Occurrence of ParanatroliteHide

Synonyms of ParanatroliteHide

Other Language Names for ParanatroliteHide

Relationship of Paranatrolite to other SpeciesHide

Other Members of this group:
Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2OOrth.
MesoliteNa2Ca2Si9Al6O30 · 8H2OOrth. mm2 : Fdd2
NatroliteNa2Al2Si3O10 · 2H2OOrth. mm2 : Fdd2
ScoleciteCaAl2Si3O10 · 3H2OMon. m : Bb

Related Minerals - Nickel-Strunz GroupingHide

9.GA.05Gonnardite(Na,Ca)2(Si,Al)5O10 · 3H2OOrth.
9.GA.05MesoliteNa2Ca2Si9Al6O30 · 8H2OOrth. mm2 : Fdd2
9.GA.05NatroliteNa2Al2Si3O10 · 2H2OOrth. mm2 : Fdd2
9.GA.05ScoleciteCaAl2Si3O10 · 3H2OMon. m : Bb
9.GA.10Thomsonite-CaNaCa2[Al5Si5O20] · 6H2OOrth. mmm (2/m 2/m 2/m)
9.GA.10Thomsonite-SrNa(Sr,Ca)2[Al5Si5O20] · 7H2OOrth. mmm (2/m 2/m 2/m)
9.GA.15EdingtoniteBa[Al2Si3O10] · 4H2O

Related Minerals - Dana Grouping (8th Ed.)Hide · 2H2OOrth. mm2 : Fdd2 · 8H2OOrth. mm2 : Fdd2 · 3H2OMon. m : Bb[Al2Si3O10] · 4H2O,Ca)2(Si,Al)5O10 · 3H2OOrth. · 6H2OOrth.

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.2.1AlbiteNa(AlSi3O8)Tric. 1
16.2.2AnalcimeNa(AlSi2O6) · H2OTric. 1 : P1
16.2.3UssingiteNa2AlSi3O8OHTric. 1 : P1
16.2.5NatroliteNa2Al2Si3O10 · 2H2OOrth. mm2 : Fdd2
16.2.9Rectorite(Na,Ca)Al4((Si,Al)8O20)(OH)4 · 2H2OMon.

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 ParanatroliteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Chao, G.Y. (1980) Paranatrolite, a new zeolite from Mont St-Hilaire, Québec. Canadian Mineralogist: 18: 85-88.
Khomyakov, A.P., G.Y. Cherepivskaya, and M.G. Mikheeva (1986) First paranatrolite finds in the USSR. Doklady Acad. Nauk SSSR: 288: 214-217 (in Russian).
Taucher, J., Postl, W., Moser, B., Jakely, D., Golob P. (1989) Klöch - Ein südoststeirisches Basaltvorkommen und seine Minerale. Eigenverlag Taucher und Jakely: 160 pp.
Alberti, A., Cruciani, G., and Dauru, I. (1995) Order disorder in natrolite group minerals. European Journal of Mineralogy: 7: 501-508.
Postl, W., Taucher, J. & Moser, B. (1996) Neue Mineralfunde im oststeirischen Vulkangebiet. Mitt. Abt. Miner. Landesmuseum Joanneum: 60/61: 3-76.
Evans, H.T., Konnert, J.A., and Ross, M. (2000) The crystal structure of tetranatrolite from Mont Saint-Hilaire, Québec, and its chemical and structural relationship to paranatrolite and gonnardite. American Mineralogist: 85: 1808-1815.
Seryotkin, Y.V., Bakakin, V.V., and Belitsky, I.A. (2004) The crystal structure of paranatrolite. European Journal of Mineralogy: 16: 545-550.
Lee, Y., Hriljac, J.H., Parise, J.B., and Vogt, T. (2005) Pressure-induced stabilization of ordered paranatrolite: A new insight into the paranatrolite controversy. American Mineralogist: 90: 252-257.
Lee, Yongjae, Hriljac, Joseph A., Parise, John B., and Vogt, Thomas (2006) Pressure-induced hydration in zeolite tetranatrolite. American Mineralogist: 91: 247-251.
Seryotkin, Yu,V., Bakakin, V.V. (2007) The reversibility of the paranatrolite-tetranatrolite transformation. European Journal of Mineralogy: 19: 593-598.

Internet Links for ParanatroliteHide

Localities for ParanatroliteHide

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.
  • Chubut Province
R. S. Bowman and S. E. Delap (Eds.) Zeolite ’06—7th International Conference on the Occurrence, Properties, and Utilization of Natural Zeolites Socorro, New Mexico USA, 16–21 July 2006 p. 242
  • Styria
    • Bad Radkersburg
      • Klöch
R. Exel: Die Mineralien und Erzlagerstätten Österreichs (1993)
    • Feldbach
      • Mühldorf
Postl, W., Taucher, J. & Moser, B. (1996): Neue Mineralfunde im oststeirischen Vulkangebiet. Mitt. Abt. Miner. Landesmuseum Joanneum, 60/61, 3-76.
  • Cochabamba
    • Ayopaya Province
PXRD by John Attard (Attards Minerals)
Canada (TL)
  • Québec
    • Montérégie
      • La Vallée-du-Richelieu RCM
        • Mont Saint-Hilaire
Chao, G.Y. (1980), Paranatrolite, a new zeolite from Mont St-Hilaire, Quebec. Canadian Mineralogist: 18: 85-88; Tschernich, R. (1992): Zeolites of the World, p.52,394
      • Lajemmerais RCM
        • Varennes & St-Amable
HORVÁTH, L., PFENNINGER HORVÁTH, E., GAULT, R.A., and TARASSOFF, P. (1998) Mineralogy of the Saint Amable sill, Varennes and Saint Amable, Québec, Canada. Mineralogical Record, 29, 83 118.
Horváth, L., Pfenninger-Horváth, E., Gault, R. A., & Tarassoff, P. (1998): Mineralogy of the Saint-Amable Sill, Varennes and Saint-Amable, Québec. Mineralogical Record, 29: 83-118.
  • Bavaria
    • Franconia
      • Maroldsweisach
Wittern: "Mineralfundorte in Deutschland", 2001
    • Upper Franconia
      • Wunsiedel in Fichtelgebirge
        • Marktredwitz
          • Pechbrunn
Weiss: "Mineralfundstellen, Deutschland West", 1990
        • Selb
          • Längenau
Keck, E. (2008): Der Wartberg bei Längenau, nordöstlich von Selb, in Oberfranken. Aufschluss 59, 109-128.
  • Rhineland-Palatinate
    • Ahrweiler
      • Brohltal
        • Brenk
Hentschel, G., Die Mineralien der Eifelvulkane, Weise Verlag München, 1983
  • Veszprém
    • Tapolca
      • Lesenceistvánd
Szakáll & Jánosi: Minerals of Hungary, 1995; Kovács, I. et al. (2009): Guide to the Bakony-Balaton Volcanic Highland, Field Trip 1, 7th September 2009. MinPet2009 field trip booklet, 23 pp.
      • Zalahaláp
Szakáll & Jánosi: Minerals of Hungary, 1995
  • Vestfold
    • Larvik
      • Malerød
Andresen, P. (2011): Mineralene fra Midtfjellet larvikittbrudd, Malerød, Larvik. Norsk Bergverksmuseum Skrift. 46: 41-47
  • Chelyabinsk Oblast
  • Murmansk Oblast
    • Khibiny Massif
PEKOV, I.V. & NIKOLAEV, A.P. (2013) Minerals of the pegmatites and hydrothermal assemblages of the Koashva deposit (Khibiny, Kola Peninsula, Russia). Mineralogical Almanac 189(2), 7-65.
Pekov, I.V. & Podlesnyi, A.S. (2004): Kukisvumchorr Deposit: Mineralogy of Alkaline Pegmatites and Hydrotermalites. Mineralogical Almanac, vol. 7, 140 pages + xxiv photo's pages
      • Suoluaiv Mt
Igor Pekov data
  • Northern Ireland
    • Co. Antrim
Nawaz, R. Unpublished data on UM specimen.; 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.
        • Gobbins
Nawaz, R. and Malone, J.F. (1982) Gobbinsite, a New Zeolite Mineral from Co. Antrim, N. Ireland. Mineralogical Magazine, vol. 46, n° 340, pp. 365-369.; Nawaz, R. Unpublished data on UM specimens.; 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.
  • New Mexico
    • Colfax Co.
      • Springer
        • Point of Rocks Mesa (Pecks Mesa)
Rocks & Min.: 60:229.
Mineral and/or Locality  
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