NOVELTY - Solid reactant (I) is new. (I) is variable between filled state, in which x is maximized and y is minimized, and empty state, in which x is minimized and y is maximized, transition metal, at least one of first non-metal and oxygen (second non-metal), and optionally cation, form crystal lattice. At least portion of first non-metal may be removed from reactant upon reaction of reactant with compound comprising second non-metal, reaction results in at least portion of second non-metal contained in product added to reactant and formation of product.    USE - The solid reactant is useful for: supplying a non-metal element during a chemical reaction occurring near atmospheric pressure and resulting in the formation of a product comprising the non-metal element; and producing a compound which is ammonia, hydrazine or a hydrocarbon compound that is a 1-4C hydrocarbon compound (all claimed).    ADVANTAGE - The solid reactant provides a source of the first non-metal for a chemical reaction resulting in the formation of a product comprising the first non-metal (claimed).    DETAILED DESCRIPTION - Solid reactant of formula (I) is new. (I) is variable between a filled state, in which x is maximized and y is minimized, and an empty state, in which x is minimized and y is maximized, the transition metal, at least one of the first non-metal and oxygen (second non-metal), and optionally the cation, form a crystal lattice. At least a portion of the first non-metal may be removed from the reactant upon reaction of the reactant with a compound comprising the second non-metal, the reaction results in at least a portion of the second non-metal contained in the product added to the reactant and formation of the product.    A1 = cation;    E1 = optional anion or anionic group or electrons providing electroneutrality of the bulk reactant;    M1 = transition metal;    D1 = first non-metal comprising C or N;    x = n-p;    y = m-q;    n, m = greater than 0;    p = greater than n to less than or equal to 0; and    q = greater than m to less than or equal to 0.    INDEPENDENT CLAIMS are also included for:    (1) making (I); and    (2) producing a compound comprising a first non-metal and hydrogen comprising: (a1) providing a solid reactant material comprising the first non-metal and a second non-metal, a transition metal, a cation and an optional anion or anionic group or electrons providing electroneutrality of the bulk of the solid reactant material; and (b1) reacting the solid reactant material with steam at a pressure of less than 10 atmospheres and a temperature of at least 200 degrees C to produce the compound and a spent reactant material, where the spent reactant material has a lower ratio of the first non-metal to the second non-metal than the solid reactant material.