. "The metamict state : ... an unusual state of matter, amorphous because of the disruption of the crystal structure by radiation from contained or nearby radioactive atoms" . . "The metamict state : an unusual state of matter, amorphous because of the disruption of the crystal structure by radiation from contained or nearby radioactive atoms" . "The matamict state : an unusual state of matter, amorphous because of the disruption of the crystal structure by radiation from contained or nearby radioactive atoms"@en . "The metamict state" . . . . . "The metamict state : an unusual ... radioactive forms"@en . . . . .