ÝÊÅÐÌÀÍÈÒ (ÝÊÊÅÐÌÀÍÍÈÒ) [ïîôàì. Ýêêåðìàíí] — ì-ë, ùåëî÷íîé àìôèáîë èçîìîðôíîé ñåðèè Ý.— àðôâåäñîíèò. ñîäåð. 70 ìîë.% Mg êîìïîíåíòà, Na2,5Ca0,5(Mg, Få2+, Fe3+, Al)5[(OH,F)2|Al0,5Si7,5O22].  íåôåëèíîâîì ñèåíèòå.
