allotropic

[Eng. allotropy; -ic.] Pertaining to allotropy; existing in diverse states, as the diamond in the form of the hardest of minerals, and also of charcoal. "Well, what is lamp-black? Chemists will tell you that it is an allotropic form of the diamond diamond: here, in fact, is a diamond reduced to charcoal by intense heat. Now the allotropic condition has long been defined as due to a difference in the arrangement of a body's particles." - Tyndall on Heat , 3rd ed., p. 323.