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grayish-blue to bluish-violet
Crystal System:
Named after Josef Sekanina (1901-1986) Czech mineralogist.
Dimorph of:
Hide all sections | Show all sections

Classification of SekaninaiteHide


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

Physical Properties of SekaninaiteHide

Transparent, Translucent
grayish-blue to bluish-violet
7½ on Mohs scale

Optical Data of SekaninaiteHide

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 SekaninaiteHide

IMA Formula:
Common Impurities:

Crystallography of SekaninaiteHide

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

Type Occurrence of SekaninaiteHide

Synonyms of SekaninaiteHide

Other Language Names for SekaninaiteHide

Relationship of Sekaninaite to other SpeciesHide

Common AssociatesHide

Associated Minerals Based on Photo Data:
Orthoclase1 photo of Sekaninaite associated with Orthoclase on

Related Minerals - Nickel-Strunz GroupingHide

9.CJ.05BazziteBe3Sc2(Si6O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05BerylBe3Al2(Si6O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05IndialiteMg2Al3(AlSi5O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.05StoppaniiteBe3Fe3+2(Si6O18) · H2OHex. 6/mmm (6/m 2/m 2/m) : P6/mcc
9.CJ.10Cordierite(Mg,Fe)2Al3(AlSi5O18)Orth. mmm (2/m 2/m 2/m) : Cccm
9.CJ.15aCombeiteNa2Ca2(Si6O18)0.5Trig. 3m (3 2/m) : R3m
9.CJ.15cKoashviteNa6(Ca,Mn)(Ti,Fe)Si6O18 · H2OOrth.
9.CJ.15aLovozeriteNa2Ca(Zr,Ti)(Si6O12)[(OH)4O2] · H2OMon.
9.CJ.15aTisinaliteNa3H3(Mn,Ca,Fe)TiSi6(O,OH)18 · 2H2OTrig.
9.CJ.15aLitvinskiteNa2(◻,Na,Mn)ZrSi6O12(OH,O)6Mon. m : Bm
9.CJ.15aKapustiniteNa5(Na,Mn2+)<1Zr(H2Si6O18)Mon. 2/m
9.CJ.25KatayamaliteKLi3Ca7Ti2(SiO3)12(OH)2Mon. 2/m : B2/b
9.CJ.25AleksandroviteKCa7Sn2Li3Si12O36F2Mon. 2/m : B2/b
9.CJ.30DioptaseCuSiO3 · H2OTrig. 3 : R3
9.CJ.35KostyleviteK2Zr(Si3O9) · H2OMon.
9.CJ.40PetarasiteNa5Zr2(Si6O18)(Cl,OH) · 2H2OMon. 2/m : P21/m
9.CJ.45Gerenite-(Y)(Ca,Na)2(Y,REE)3Si6O18 · 2H2OTric.
9.CJ.60PezzottaiteCs(Be2Li)Al2(Si6O18)Trig. 3 : R3

Related Minerals - Dana Grouping (8th Ed.)Hide,Fe)2Al3(AlSi5O18)Orth. mmm (2/m 2/m 2/m) : Cccm

Related Minerals - Hey's Chemical Index of Minerals GroupingHide

16.19.1IndialiteMg2Al3(AlSi5O18)Hex. 6/mmm (6/m 2/m 2/m) : P6/mcc
16.19.2Cordierite(Mg,Fe)2Al3(AlSi5O18)Orth. mmm (2/m 2/m 2/m) : Cccm
16.19.5StauroliteFe2+2Al9Si4O23(OH)Mon. 2/m : B2/m
16.19.6Chloritoid(Fe2+,Mg,Mn2+)Al2(SiO4)O(OH)2Mon. 2/m : B2/b
16.19.7AmesiteMg2Al(AlSiO5)(OH)4Tric. 1 : P1
16.19.9YoderiteMg(Al,Fe3+)3(SiO4)2O(OH)Mon. 2/m : P21/m
16.19.11Ferrocarpholite(Fe2+,Mg)Al2(Si2O6)(OH)4Orth. mmm (2/m 2/m 2/m) : Ccca
16.19.15Berthierine(Fe2+,Fe3+,Al)3(Si,Al)2O5(OH)4Mon. m : Bm
16.19.16Odinite(Fe,Mg,Al,Fe,Ti,Mn)2.4((Si,Al)2O5)(OH)4Mon. m : Bm
16.19.17ClinochloreMg5Al(AlSi3O10)(OH)8Mon. 2/m : B2/m
16.19.22VermiculiteMg0.7(Mg,Fe,Al)6(Si,Al)8O20(OH)4 · 8H2OMon. 2/m
16.19.23Corrensite(Mg,Fe)9((Si,Al)8O20)(OH)10 · nH2OOrth.

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 SekaninaiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
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 SekaninaiteHide

Localities for SekaninaiteHide

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.
  • Tasmania
    • Dorset municipality
      • Scottsdale district
Bottrill & Baker (in prep) Catalogue of minerals of Tasmania; Bottrill, R.S., Taheri, J., Keele, R.A., McClenaghan, M.P. 1994. A field guide to gold deposits in northeastern Tasmania. MRT UR1994_19
  • 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 District
        • Dolní Bory
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.
        • Křižanov
Scr.Fac.Sci.Nat. Ujep Brun.,geol.I (1975) no. 5, 21-30
  • 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
        • Feriolo
Piccoli, G.C., Maletto, G., Bosio, P., Lombardo, B. (2007): Minerali del Piemonte e della Valle d'Aosta. Associazione Amici del Museo "F. Eusebio" di Alba, Ed., Alba, 607 pp.
        • 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.
  • Upper Silesia (Śląskie)
    • Bytom District (Beuthen)
      • Bytom
Kruszewski, Ł. (2018)(?): Geochemical Behavior of Trace Elements in Upper and Lower Silesian Basin Coal-Fire Gob Piles, Poland. Coal and Peat Fires, vol. 5, xx-xx (in review/correction); Ł. Kruszewski EPMA/PXRD data
  • 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
    • Murmanskaya Oblast'
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.
  • Northern Ireland
    • Co. Antrim
      • Rathlin Island
Wilson, H.E. and Robbie, J.A. (1966) Geology of the country around Ballycastle, Memoir Geol. Survey N.I., 2nd edn, pp. 243-244.; 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.
  • 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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