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The crystal structures and hydrogenation behavior of the (Ca_(0.9)Sr_(0.1))_8(Al_(1-x)Zn_x)_3 (x=0,0.2,0.2,0.3 and 0.4) alloys were investigated.The new phase (Ca,Sr)_2(Al,Zn) was found when x(?)0.2.(Ca,Sr)_2(Al,Zn) crystallizes in space group I4/mmm (A-139).The lattice parameters were calculated to be a=b=1.1626(2) nm,c=2.6422(4) nm.Zn atoms occupy the 8h and 16n sites together with Al atoms.The (Ca_(0.9)Sr_(0.1))_8Al_3 alloy only contains a single Ca_8Al_3 phase.The (Ca_(0.9)Sr_(0.1))_8(Al_(1-x)Zn_x)_3 alloys consist of Ca_8Al_3,Ca_5Zn_3,Ca and (Ca,Sr)_2(Al,Zn) phases when x is from 0.1 to 0.3.As x increasing to 0.4,the alloy consists of (Ca,Sr)_2(Al,Zn),Ca_5Zn_3 and Ca.The hydrogenated (Ca_(0.9)Sr_(0.1))_8Al_3 and (Ca_(0.9)Sr_(0.1))_8(Al_(0.9)Zn_(0.1))_3 samples consist of CaH_2 and Al.The (Ca_(0.9)Sr_(0.1))_8(Al_(1-x)Zn_x)_3 (x=0.2,0.3 and 0.4) samples can be hydrogenated into Call_2,Al and CaZn_(13) under a hydrogen pressure of 5 MPa at 473 K.
The crystal structures and hydrogenation behavior of the (Ca_ (0.9) Sr_ (0.1)) _8 (Al_ (1-x) Zn_x) _3 (x = 0,0.2,0.2,0.3 and 0.4) (Al, Zn) was found when x (?) 0.2. (Ca, Sr) _2 (Al, Zn) crystallizes in space group I4 / mmm a = b = 1.1626 (2) nm, c = 2.6422 (4) nm.Zn atoms occupy the 8h and 16n sites together with Alatoms. (Ca_ (0.9) Sr_ (0.1)) _8Al_3 alloys contain only a single Ca_8Al_3 phase The (Ca_ (0.9) Sr_ (0.1)) _8 (Al_ (1-x) Zn_x) _3 alloys consist of Ca_8Al_3, Ca_5Zn_3, Ca and 0.3 As x increasing to 0.4, the alloy consists of (Ca, Sr) _2 (Al, Zn), Ca_5Zn_3 and Ca.The hydrogenated (Ca_ (0.9) Sr_ (0.1)) _8Al_3 and (Ca_ (0.9) Sr_ (Al_ (0.9) Zn_ (0.1)) _3 samples consist of CaH_2 and Al.The Ca_ (0.9) Sr_ (0.1) __ (Al_ (1-x) Zn_x) _3 (x = 0.2,0.3 and 0.4) samples can be hydrogenated into Call_2, Al and CaZn_ (13) under a hydrogen pressure of 5 MPa at 473 K.