the present invention discloses an exfoliative clay and a derivative thereof and a method for producing the same . the exfoliative clay is formed by emulsion exfoliating an inorganic layered silicate clay with an amphibious intercalating agent by powerfully stirring at 60 – 180 ° c . and not less than 14 . 7 psig . the amphibious intercalating agent is obtained by copolymerizing polyoxyalkylene amine having molecular weight over 1 , 800 and polypropylene - grafting - maleic anhydride . before emulsion exfoliation , the intercalating agent is acidified with an inorganic acid . the acidification is the key step for obtaining nanoscale of emulsifying particles less than 100 nm for the exfoliation . the exfoliative clay can be further extracted with a hydroxide or a chloride of alkali metal or alkaline - earth metal to obtain a derivative in the form of nanosilica plates which is free of organic portions .