ALLOY, HYDROGEN EXTRACTION SYSTEM, HYDROGEN STORAGE MATERIAL, AND METHOD FOR PRODUCING ALLOY

To provide an alloy that can occlude hydrogen from the atmosphere at ordinary temperature and ordinary pressure.SOLUTION: The alloy (10) has a composition of AlxFe1-x(x=0.7 to 0.9), AlxCo1-x(x=0.7 to 0.9) or AlxMn1-x(x=0.7 to 0.9). The alloy (10) contains an amorphous structure, has a plurality of first regions (13) in which the density of the alloy (10) is smaller as compared with the other regions, and, in the cross section obtained when the alloy (10) is cut in a plane perpendicular to the surface of the alloy (10), has a distance between the neighboring first regions of 30 nm or less.SELECTED DRAWING: Figure 3 【課題】常温かつ常圧で大気中から水素を吸蔵することができる合金を実現する。【解決手段】合金（１０）は、ＡｌｘＦｅ１－ｘ（ｘ＝０．７～０．９）、ＡｌｘＣｏ１－ｘ（ｘ＝０．７～０．９）またはＡｌｘＭｎ１－ｘ（ｘ＝０．７～０．９）の組成を有する。合金（１０）は、非晶質構造を含み、他の領域に比べて合金（１０）の密度が小さくなる複数の第１領域（１３）を有し、合金（１０）の表面に対して垂直な平面で合金（１０）を切断したときの断面において、隣接する第１領域の間の距離が３０ｎｍ以下である。【選択図】図３