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grayish-blue to ...
Named after Josef Sekanina (1901-1986) Czech mineralogist.
Dimorph of:

Classification of Sekaninaite


9 : SILICATES (Germanates)
C : Cyclosilicates
J : [Si6O18]12- 6-membered single rings (sechser-Einfachringe), without insular complex anions

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

16 : Silicates Containing Aluminum and other Metals
19 : Aluminosilicates of Fe and Mg

Type Occurrence of Sekaninaite

Physical Properties of Sekaninaite

Diaphaneity (Transparency):
Transparent, Translucent
grayish-blue to bluish-violet
Hardness (Mohs):

Crystallography of Sekaninaite

Crystal System:
Cell Parameters:
a = 17.18Å, b = 9.82Å, c = 9.29Å
a:b:c = 1.749 : 1 : 0.946
Unit Cell Volume:
V 1,567.29 ų (Calculated from Unit Cell)

Optical Data of Sekaninaite

Biaxial (-)
RI values:
nα = 1.561 nβ = 1.572 nγ = 1.576
Measured: 66° , Calculated: 60°
Max Birefringence:
δ = 0.015
Image shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Surface Relief:

Chemical Properties of Sekaninaite

All elements listed in formula:
Common Impurities:

Relationship of Sekaninaite to other Species

Forms a series with Cordierite (see here)
9.CJ.05StoppaniiteBe3Fe23+(Si6O18) · H2O
9.CJ.15cKoashviteNa6(Ca,Mn)(Ti,Fe)Si6O18 · H2O
9.CJ.15aLovozeriteNa2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2O
9.CJ.15aTisinaliteNa3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2O
9.CJ.30DioptaseCuSiO3 · H2O
9.CJ.35KostyleviteK2Zr(Si3O9) · H2O
9.CJ.40PetarasiteNa5Zr2(Si6O18)(Cl,OH) · 2H2O
9.CJ.45Gerenite-(Y)(Ca,Na)2(Y,REE)3Si6O18 · 2H2O
16.19.22VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2O
16.19.23Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2O

Other Names for Sekaninaite

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 Sekaninaite

Reference List:
Stanek, J. and Miskovsky, J. (1975) Sekaninaite, a new mineral of the cordierite series, from Dolni Bory, Czechoslovakia. Scr. Fac. Sci. Nat. Ujep Brun., Geol. 1(5), 21-30.

American Mineralogist (1977): 62: 395 (abstract).

Hochella, M.F., Jr., Brown, G.E., Jr.,
Ross, F.K., and Gibbs, G.V. (1979) High-temperature crystal chemistry of hydrous Mg- and Fe-cordierites. American Mineralogist: 64: 337-351.

Ryback, G., Nawaz, R., and Farley, E. (1988) Seventh supplementary list of British Isles minerals (Irish). Mineralogical Magazine: 52: 267-274.

Canadian Mineralogist (1997): 35: 167.

Yakubovich, O. V., Massa, V., Pekov, I. V., Gavrilenko, P. G. & Chukanov, N. V. (2004): Crystal structure of the Na-, Ca-, Be-cordierite and crystallochemical regularities in the cordierite-sekaninaite series. Crystallography Reports 49, 953-963.

Haefeker, U.; Kaindl, R.; Tropper, P.; Krüger, H.; Kahlenberg, V.; Orlova, M. (2014): Structural investigations of the two polymorphs of synthetic Fe-cordierite and Raman spectroscopy of hexagonal Fe-cordierite. Mineralogy and Petrology 108, 469-478.

Internet Links for Sekaninaite URL:
Please feel free to link to this page.
The following Sekaninaite specimens are currently listed for sale on

Localities for Sekaninaite

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.
  • Tasmania
    • Scottsdale district
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania
  • Styria
    • Bad Radkersburg
      • Klöch
Taucher, J. & Hollerer, C. E. (1998): Minerale eines Si- und Al-reichen Xenoliths aus dem Basaltsteinbruch von Klöch, Nördlicher Bruch, (Steiermark, Österreich). Mitt. naturwiss. Ver. Steiermark 128, 21-42.
  • British Columbia
    • Revelstoke Mining Division
      • Revelstoke
DIXON,A., CEMPIREK, J. & GROAT, L.A. (2014) Mineralogy and geochemistry of pegmatites on Mount Begbie, British Columbia. Canadian Mineralogist 52, 129-164.; Dixon, A. (2014, October). Mount Begbie Pegmatite Group, British Columbia, Canada–evolution from Barren to Complex Rare-element Pegmatites. In 2014 GSA Annual Meeting in Vancouver, British Columbia.
Czech Republic
  • Bohemia (Böhmen; Boehmen)
    • Ústí Region
      • Bílina (Bilin)
Žáček V, Skála R., Dvořák Z.: Spinelidy v pyrometamorfovaných horninách Mostecké pánve. Minerál, 2010, 18, 1, 21-31.
  • Moravia (Mähren; Maehren)
    • South Moravia Region
      • Tišnov
        • Drahonín
Škoda, R., Novák, M.: Akcesorické Nb-Ta-Ti minerály z pegmatitu v uranovém dole Drahonín, strážecké moldanubikum. Acta Musei Moraviae, Scientiae geologicae, 2004, roč. 89, s. 55 - 66.
    • Vysočina Region
      • Žďár nad Sázavou
Scr.Fac.Sci.Nat. Ujep Brun.,geol.I (1975) no. 5, 21-30
Staněk, J.: Asociace minerálů významnějších pegmatitových žil v Hatích u Dolních Borů na západní Moravě. Acta Musei Moraviae, Scientiae naturales, 1997, roč. 82, 3-19.
Staněk, J.: Asociace minerálů významnějších pegmatitových žil v Hatích u Dolních Borů na západní Moravě. Acta Musei Moraviae, Scientiae naturales, 1997, roč. 82, 3-19. ; Novák, M., Johan, Z., Škoda, R., Černý, P., Šrein, V., & Veselovský, F. (2008). Primary oxide minerals in the system WO3–Nb2O5–TiO2–Fe2O3–FeO and their breakdown products from the pegmatite No. 3 at Dolní Bory-Hatě, Czech Republic. European Journal of Mineralogy, 20(4), 487-499.
Staněk, J.: Asociace minerálů významnějších pegmatitových žil v Hatích u Dolních Borů na západní Moravě. Acta Musei Moraviae, Scientiae naturales, 1997, roč. 82, 3-19.
Staněk, J.: Asociace minerálů významnějších pegmatitových žil v Hatích u Dolních Borů na západní Moravě. Acta Musei Moraviae, Scientiae naturales, 1997, roč. 82, 3-19.
  • Southern Finland Region
    • Lappeenranta
Hytönen,K. (1999): Suomen Mineraalit. Geologian tutkimuskeskus. Erillisjulkaisu, Jyväskylä, 399 pp.
  • Southwestern Finland Region
    • Kemiö Island (Kimito Island)
Ilkka Mikkola
  • Bavaria
    • Upper Palatinate
      • Winklarn
Keck, E., Mücke, A., Kronz, A. & Stanĕk, J. (2010): Sekaninait aus einem Pegmatitgang im Serpentinit von Galgenberg bei Winklarn in der Oberpfalz. Der Aufschluss 61, 1-16 (in German).
  • Piedmont
    • Verbano-Cusio-Ossola Province
      • Baveno
        • Oltrefiume
          • Mount Camoscio
Grill, E. (1935): I minerali del granito di Baveno, la fayalite. Periodico di Mineralogia, 129-133. - Gallitelli, P. (1936): Le miche del granito di Baveno. . Periodico di Mineralogia, 61-76 - Pagliani, G. (1948): Le Zeoliti del granito di Baveno. Periodico di Mineralogia, 175-188. - Ravagnani, D. (1974): I giacimenti uraniferi italiani - Gruppo Mineralogico Lombardo - Museo Civico di Storia Naturale di Milano, Ed., Milano, 188 pp. - min. Rec. 14 (3), 157-168 - Am. Min. 83, 1330-1334 (1998) - Am. Min. 84, 782-789 (1999). - Guastoni, A. & Pezzotta, F. (2004): Kristiansenite a Baveno, second ritrovamento Mondiale della specie. Rivista Mineralogica Italiana, 4/2004, 247-251. - Guastoni, A., Demartin, F., Pezzotta, F. (2004): Sekaninaite delle pegmatiti granitiche di Feriolo e Baveno (VB). Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale di Milano, 145, 59-68. - Mineralogist americano (2005) 90, 1442-1452.
Guastoni, A., Demartin, F., Pezzotta, F. (2004): Sekaninaite delle pegmatiti granitiche di Feriolo e Baveno (VB). Atti della Società Italiana di Scienze Naturali e del Museo Civico di Storia Naturale in Milano, 145, 59-68.
  • Tuscany
    • Livorno Province
      • Elba Island
        • Campo nell'Elba
Orlandi P., Pezzotta F.(1994): La sekaninaite dei filoni pegmatitici elbani. Atti Soc. Tosc. Sc. Nat,. Mem., 100, 85-91. and Canadian Mineralogist 38:1399-1408 (2000)
Orlandi, P., & Pezzotta, F. (1997). Minerali dell'Isola d'Elba. Edizioni Novecento Grafico, Bergamo, 249 pp.
  • Honshu Island
    • Chubu Region
      • Gifu Prefecture
        • Nakatsugawa City
          • Hirukawa
Yamada, S. (2004) Nihonsan-koubutsu Gojuon-hairetsu Sanchi-ichiranhyou (111 pp.)
    • Kinki Region
      • Nara Prefecture
        • Yoshino-gun
          • Tenkawa village
            • Omine Mts
American Mineralogist 87: 160-170 (2002)
    • Tohoku Region
      • Fukushima Prefecture
Introduction to Japanese Minerals (Geological Survey of Japan, 1970)
  • Kyushu Region
    • Fukuoka prefecture
      • Tagawa-gun
        • Kawasaki
Masutomi Museum specimens (Kyoto); Uehara, S., et al. (2014) Minerals from Kyushu and Yamaguchi. (Fukuoka Mineral Club, 355 pages)
  • Lower Silesia (Dolnośląskie)
    • Strzegom-Sobótka Massif
      • Jawor District
Körber, T. & Szuzkiewicz, A. (2010): Striegau/Strzegom - eine Weltklasse-Fundstelle für Pegmatitmineralien. Lapis 35 (7-8), 35-56; 86.
  • Far-Eastern Region
    • Magadanskaya Oblast'
      • Kolyma River Basin
        • Ducat District
          • Omsukchan
Filimonova, L.G., and Trubkin, N.V. (2008): Geology of Ore Deposits 50(2), 135-144.
  • Northern Region
    • Murmanskaja Oblast'
      • Kola Peninsula
Olga Yakovleva, I. Pekov, I. Bryzgalov, Yu. Men’shikov, V. Yapaskurt, E. Guseva, N. Korotaeva (2009) Chalcogenide Minerals in Fenitized Xenoliths in Khibiny Alkaline Complex Kola Peninsula, Russia): Diversity and Chemical Features. Fifth International Symposium Mineral Diversity Research and Preservation pp213-216
Ivanyuk, G.Y., Pakhomovsky, Y.A., Konopleva, N.G., Yakovenchuk, V.N., Men’shikov, Y.P., and Mikhailova, Y.A. (2007): Geology of Ore Deposits 49(7), 599-606.
Yakovenchuk, V.N., Ivanyuk, G.Y., Pakhomovsky, Y.A., Men’shikov, Y.P., Konopleva, N.G., and Korchak, Y.A. (2008): Geology of Ore Deposits 50(8), 732-745.
  • Urals Region
    • Southern Urals
      • Chelyabinsk Oblast'
Cesnokov, B., Kotrly, M. and Nisanbajev, T. (1998): Brennende Abraumhalden und Aufschlüsse im Tscheljabinsker Kohlenbecken - eine reiche Mineralienküche. Mineralien-Welt, 9 (3), 54-63 (in German).
  • Prešov Region
    • Prešov Co.
Košuth M., 2006: New type of cordierite assemblages from the Slanske vrchy Mts., Eastern Slovakia. Acta Miner.-Petrograph.,Abstract Series 5, Szeged, p.59
    • Vranov nad Topľou Co.
Ďuďa,R., et al., 1981: Mineralógia severnej časti Slanských vrchov. Min.Slovaca, Monografia 2, 98s
  • Värmland
    • Filipstad
Damman, A.H.(1989): Hydrothermal orthoamphibole-bearing assemblages from the Gåsborn area, West Bergslagen, central Sweden. American Mineralogist. 74, 573-585
  • Viloyati Sogd (Viloyati Sughd; Viloyati Khodzhent; Viloyati Leninabad)
    • Zeravshan Range
      • Yagnob River
Sharygin, V.V., Sokol, E.V. and Belakovskii, D.I. (2009): Fayalite-sekaninaite paralava from the Ravat coal fire (central Tajikistan). Russian Geology and Geophysics 50, 703-721.
  • Maine
    • Oxford Co.
      • Upper Cupsuptic
Anderson, 1991. Maine Mineral Localities, 2nd ed.
  • New Hampshire
    • Merrimack Co.
Harvard Mineralogical Museum, no. 118875
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