TECHNOLOGY FOCUS - INORGANIC CHEMISTRY - Preferred Composition: The hydrogen is released from the storage composition in a fully hydrogenated state to form a composition of a formula M'xM''yNz. The hydrogen storage composition is formed by reacting a hydride of formula MIa(MIIHb)c with a nitride of formula (MIIIf(NHe)g)-c, where a, b, c, e, f, and g are selected to maintain electroneutrality. The hydrogen storage composition of formula (M'1)x1(M''1)y1NzHd1 is formed by reacting a hydride of formula AMIa1(MIIHb1)a with a nitride of formula B(MIIIf(N-He)g)-c.(C1) comprises a single phase, which is a compound.(I) releases hydrogen (DH2) and MI_AMII(Axa)MIIIBN(Bxg), where D is d /2.(C1) comprises Li3BN2H8 which is expressed by the nominal general LiqBrNsHt where the atomic ratio of q/r is 3, s/r is 2, and t/r is 8.M'1= MI or MIII;M''1=MII;x=(A+B);y1=a1;z1=(Bxg);d1=(Axaxb1)+(Bxexg);A=1;B=0.5 - 3 (preferably 2 - 2.25);A=1;B=0.5 - 3 (preferably 2 - 2.25).Preferred Method: For storing hydrogen the hydrogen storage composition releases hydrogen by reacting to form a hydrogen product and at least one byproduct composition comprising nitrogen and at least one of the cation other than hydrogen derived from the nitride and derived from the hydride respectively.For releasing hydrogen, the reaction of AMIa(MIIHb)a and B(MIIIf(NHe)g)-c release hydrogen (DH2) and MIAMII(Axa)MIIIBN(Bxg) (where D is ((Axaxb)+(Bxexg))/2, C is (3-e), and g is f/c); the reaction of AMIa(MIIHb)a, B(MIf(NHe)g)-c and EMIIIIHh release hydrogen (DH2) and AMII(Axa)MIIIBMIIIIEN(Bxg), (where D is ((Axaxb)+(Bxexg)+(Exh))/2, C is (3-e), and g is f/c). The reaction is conducted in an inert atmosphere. Prior to the reacting, reducing the nitride to an average particle diameter size of less than 3 microns; reducing the hydride to an average particle diameter size of less than 25 microns; and reducing the nitride composition and the hydride composition to an average particle diameter size of less than 15 microns. The reaction is conducted at greater than or equal to 85 degrees C in a milling process, where the nitride and the hydride are milled to reduce particle size and provide energy sufficient for the reaction. The reaction to release hydrogen is conducted at greater than or equal to 170 (preferably 210) degrees C.MIIII=a cationic species other than hydrogen;h=an atomic ratio of hydrogen (preferably 0 - 2).Preferred Component: The hydride is represented by MIa(MIIHb)a, and the nitride is (MIIIf(NHe)g)-c. The hydride is selected from lithium hydride (LiH), lithium aluminum hydride (LiAlH4), sodium borohydride (NaBH4), lithium borohydride (LiBH4), magnesium borohydride Mg(BH4)2 and/or sodium aluminum hydride (NaAlH4) (preferably lithium borohydride (LiBH4) or lithium aluminum hydride (LiAlH4)). The nitride is selected from lithium amide (LiNH2), sodium amide (NaNH2), magnesium amide (Mg(NH2)2), lithium nitride (Li3N), magnesium imide (MgNH), borozane (BNH6) and/or lithium azide (LiN3) (preferably lithium amide (LiNH2)). The MI, MII and MII are each cations selected from methyl (CH3), aluminum (Al), arsenic (As), boron (B), barium (Ba), beryllium (Be), calcium (Ca), cadmium (Cd), cerium (Ce), cesium (Cs), copper (Cu), europium (Eu), iron (Fe), gallium (Ga), gadolinium (Gd), germanium (Ge), hafnium (Hf), mercury (Hg), indium (In), potassium (K), lanthanum (La), lithium (Li), magnesium (Mg), manganese (Mn), sodium (Na), neodymium (Nd), nickel (Ni), lead (Pb), praseodymium (Pr), rubidium (Rb), antimony (Sb), scandium (Sc), selenium (Se), silicon (Si), samarium (Sm), tin (Sn), strontium (Sr), thorium (Th), titanium (Ti), thallium (Tl), tungsten (W), yttrium (Y), ytterbium (Yb), zinc (Zn) or zirconium (Zr) (preferably Al, B, Li, Na, K, Be, Mg, Ca and/or Sr). The MIIIIh is MgH2 and/or Mg.MI=first cationic species other than hydrogen having an average valence state represented by a (preferably Li, Ca, Na, Mg, K and/or Be);MII=second cationic species other than hydrogen (preferably Group 13 element of the Periodic Table);(bxa)/(1+a)=ratio of hydrogen to cationic species present in the hydride;MIII=at least one cationic species other than hydrogen;f=an average valence state of MI;c=(3 - e);g=f/c;((exg)/(1+g))=an atomic ratio of hydrogen to cationic species present in the nitride.    TECHNOLOGY FOCUS - ORGANIC CHEMISTRY - Preferred Composition: The hydrogen is released from the storage composition in a fully hydrogenated state to form a composition of a formula M'xM''yNz. The hydrogen storage composition is formed by reacting a hydride of formula MIa(MIIHb)c with a nitride of formula (MIIIf(NHe)g)-c, where a, b, c, e, f, and g are selected to maintain electroneutrality. The hydrogen storage composition of formula (M'1)x1(M''1)y1NzHd1 is formed by reacting a hydride of formula AMIa1(MIIHb1)a with a nitride of formula B(MIIIf(N-He)g)-c.(C1) comprises a single phase, which is a compound.(I) releases hydrogen (DH2) and MI_AMII(Axa)MIIIBN(Bxg), where D is d /2.(C1) comprises Li3BN2H8 which is expressed by the nominal general LiqBrNsHt where the atomic ratio of q/r is 3, s/r is 2, and t/r is 8.M'1= MI or MIII;M''1=MII;x=(A+B);y1=a1;z1=(Bxg);d1=(Axaxb1)+(Bxexg);A=1;B=0.5 - 3 (preferably 2 - 2.25);A=1;B=0.5 - 3 (preferably 2 - 2.25).Preferred Method: For storing hydrogen the hydrogen storage composition releases hydrogen by reacting to form a hydrogen product and at least one byproduct composition comprising nitrogen and at least one of the cation other than hydrogen derived from the nitride and derived from the hydride respectively.For releasing hydrogen, the reaction of AMIa(MIIHb)a and B(MIIIf(NHe)g)-c release hydrogen (DH2) and MIAMII(Axa)MIIIBN(Bxg) (where D is ((Axaxb)+(Bxexg))/2, C is (3-e), and g is f/c); the reaction of AMIa(MIIHb)a, B(MIf(NHe)g)-c and EMIIIIHh release hydrogen (DH2) and AMII(Axa)MIIIBMIIIIEN(Bxg), (where D is ((Axaxb)+(Bxexg)+(Exh))/2, C is (3-e), and g is f/c). The reaction is conducted in an inert atmosphere. Prior to the reacting, reducing the nitride to an average particle diameter size of less than 3 microns; reducing the hydride to an average particle diameter size of less than 25 microns; and reducing the nitride composition and the hydride composition to an average particle diameter size of less than 15 microns. The reaction is conducted at greater than or equal to 85 degrees C in a milling process, where the nitride and the hydride are milled to reduce particle size and provide energy sufficient for the reaction. The reaction to release hydrogen is conducted at greater than or equal to 170 (preferably 210) degrees C.MIIII=a cationic species other than hydrogen;h=an atomic ratio of hydrogen (preferably 0 - 2).Preferred Component: The hydride is represented by MIa(MIIHb)a, and the nitride is (MIIIf(NHe)g)-c. The hydride is selected from lithium hydride (LiH), lithium aluminum hydride (LiAlH4), sodium borohydride (NaBH4), lithium borohydride (LiBH4), magnesium borohydride Mg(BH4)2 and/or sodium aluminum hydride (NaAlH4) (preferably lithium borohydride (LiBH4) or lithium aluminum hydride (LiAlH4)). The nitride is selected from lithium amide (LiNH2), sodium amide (NaNH2), magnesium amide (Mg(NH2)2), lithium nitride (Li3N), magnesium imide (MgNH), borozane (BNH6) and/or lithium azide (LiN3) (preferably lithium amide (LiNH2)). The MI, MII and MII are each cations selected from methyl (CH3), aluminum (Al), arsenic (As), boron (B), barium (Ba), beryllium (Be), calcium (Ca), cadmium (Cd), cerium (Ce), cesium (Cs), copper (Cu), europium (Eu), iron (Fe), gallium (Ga), gadolinium (Gd), germanium (Ge), hafnium (Hf), mercury (Hg), indium (In), potassium (K), lanthanum (La), lithium (Li), magnesium (Mg), manganese (Mn), sodium (Na), neodymium (Nd), nickel (Ni), lead (Pb), praseodymium (Pr), rubidium (Rb), antimony (Sb), scandium (Sc), selenium (Se), silicon (Si), samarium (Sm), tin (Sn), strontium (Sr), thorium (Th), titanium (Ti), thallium (Tl), tungsten (W), yttrium (Y), ytterbium (Yb), zinc (Zn) or zirconium (Zr) (preferably Al, B, Li, Na, K, Be, Mg, Ca and/or Sr). The MIIIIh is MgH2 and/or Mg.MI=first cationic species other than hydrogen having an average valence state represented by a (preferably Li, Ca, Na, Mg, K and/or Be);MII=second cationic species other than hydrogen (preferably Group 13 element of the Periodic Table);(bxa)/(1+a)=ratio of hydrogen to cationic species present in the hydride;MIII=at least one cationic species other than hydrogen;f=an average valence state of MI;c=(3 - e);g=f/c;((exg)/(1+g))=an atomic ratio of hydrogen to cationic species present in the nitride.