@article{Abrahams1977,
    author = "Abrahams, S.C. and Bernstein, J.L.",
    title = "Piezoelectric langbeinite-type K2 Cd2 (S O4)3. Room temperature crystal structure and ferroelastic transformation",
    journal = "Journal of Chemical Physics",
    year = "1977",
    volume = "67",
    pages = "2146-2150",
    ASTM_id = "JCPSA6"
}

@article{Abrahams1978,
    author = "Abrahams, S.C. and Lissalde, F. and Bernstein, J.L.",
    title = "Piezoelectric langbeinite-type K2 Cd2 (S O4)3 structure at four temperatures below and one above the 432 K ferroelastic- paraelastic transition",
    journal = "Journal of Chemical Physics",
    year = "1978",
    volume = "68",
    pages = "1926-1935",
    ASTM_id = "JCPSA6"
}