The compounds CaSc 2 O 4 and SrSc 2 O 4 were synthesized by solid‐state reaction of the component oxides at temperatures ranging from 950° to 1400°C. Both calcium and strontium monoscandates are orthorhombic and analogous to CaFe 2 O 4 . Lattice parameters for CaSc 2 O 4 a re a o = 9.461, b o = 11.122, c o = 3.143 and for SrSc 2 O 4 , a o = 9.698, b o = 11.302, c o = 3.185. Based on four molecules per unit cell, the X‐ray density for CaSc 2 O 4 is 3.89 g per cm 3 and that for SrSc 2 O 4 is 4.59 g per cm 3 .
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Carter et al. (1964) studied this question.
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