A method for purifying solid borazane (NH.sub.3BH.sub.3 (s)) includes a) bringing solid borazane (NH.sub.3BH.sub.3 (s)) containing impurities into contact with a stream of gaseous ammonia (NH.sub.3 (g)) to obtain, by selective liquefaction of the borazane, a liquid phase containing liquefied borazane and ammonia and a solid phase constituted of at least a part of the impurities, b) separating the liquid and solid phases for recovery of the liquid phase, on the one hand, and of the solid phase, on the other hand; c) removing the ammonia from the recovered liquid phase, this removal causing precipitation of the purified borazane (NH.sub.3BH.sub.3 (s)); and d) recovering the purified precipitated borazane (NH.sub.3BH.sub.3 (s)).

A method for purifying solid borazane (NH.sub.3BH.sub.3 (s)) includes a) bringing solid borazane (NH.sub.3BH.sub.3 (s)) containing impurities into contact with a stream of gaseous ammonia (NH.sub.3 (g)) to obtain, by selective liquefaction of the borazane, a liquid phase containing liquefied borazane and ammonia and a solid phase constituted of at least a part of the impurities, b) separating the liquid and solid phases for recovery of the liquid phase, on the one hand, and of the solid phase, on the other hand; c) removing the ammonia from the recovered liquid phase, this removal causing precipitation of the purified borazane (NH.sub.3BH.sub.3 (s)); and d) recovering the purified precipitated borazane (NH.sub.3BH.sub.3 (s)).

A method for producing borazane, includes the synthesis of the borazane by reacting (metathesis reaction) at least one ammonium salt with at least one borohydride, the at least one borohydride being selected from the alkali metal borohydrides and the alkali-earth metal borohydrides. The (metathesis) reaction is carried out with gaseous ammonia flushing; gaseous ammonia being co-liquefied with the at least one borohydride and gradually with borazane as the borazane is synthesized.

A method for producing borazane, includes the synthesis of the borazane by reacting (metathesis reaction) at least one ammonium salt with at least one borohydride, the at least one borohydride being selected from the alkali metal borohydrides and the alkali-earth metal borohydrides. The (metathesis) reaction is carried out with gaseous ammonia flushing; gaseous ammonia being co-liquefied with the at least one borohydride and gradually with borazane as the borazane is synthesized.

Nanotube filaments comprising carbon, boron and nitrogen of the general formula B.sub.xC.sub.yN.sub.z, having high-aspect ratio and high-crystallinity produced by a pressurized vapor/condenser method and a process of production. The process comprises thermally exciting a boron-containing target in a chamber containing a carbon source and nitrogen at a pressure which is elevated above atmospheric pressure.

Nanotube filaments comprising carbon, boron and nitrogen of the general formula B.sub.xC.sub.yN.sub.z, having high-aspect ratio and high-crystallinity produced by a pressurized vapor/condenser method and a process of production. The process comprises thermally exciting a boron-containing target in a chamber containing a carbon source and nitrogen at a pressure which is elevated above atmospheric pressure.

Disclosed herein is the preparation of functional group containing amine-boranes from the corresponding amines. The mild reaction conditions allow for the direct preparation of several hitherto inaccessible amine-boranes containing a functional moiety, such as but not limited to, alkene, alkyne, hydroxyl, thiol, acetal, ester, amide, nitrile, nitro, and alkoxysilane.

The present invention is directed to a process for the synthesis of alkali metal tetrahydroborates-.sup.10B and amine borane-.sup.10B precursors, such as sodium tetrahydroborate-.sup.10B and triethylamine borane-.sup.10B.

The present invention is directed to a process for the synthesis of alkali metal tetrahydroborates-.sup.10B and amine borane-.sup.10B precursors, such as sodium tetrahydroborate-.sup.10B and triethylamine borane-.sup.10B.

Cluster-ion based superionic conductors are provided as are solid electrolytes comprising cluster-ion based superionic conductors. The solid electrolytes are use, for example, in solid state batteries.