manasseite

manasseite

[mə′nas·ē‚īt]
(mineralogy)
Mg6 Al2(OH)16(CO3)·4H2O A hexagonal mineral composed of basic hydrous magnesium and aluminum carbonate; it is dimorphous with hydrotalcite.
References in periodicals archive ?
Thus meixnerite, ideally [Mg.sub.6][Al.sub.2][(OH).sub.18][([H.sub.2]O).sub.4], is the simplest basic structure, and the minerals of the shigaite, hydrotalcite and manasseite groups are stuffed-interlayer derivatives.
Kovdor in the Kola Peninsula has yielded magnetite, phlogopite, and forsterite crystals plus a number of crystalline rarities (kovdorskite, bobierite, and manasseite).
Manasseite (HCWS) (ND 12.2, HM n/a, D7 52.9, EM 23.0).