@article{Range1990,
    author = "Range, K.J. and Haase, H.",
    title = "Na2 W2 O7 (II), a high-pressure phase of disodium ditungstate (VI)",
    journal = "Acta Crystallographica, Section C: Crystal Structure Communications",
    year = "1990",
    volume = "46",
    pages = "317-318",
    ASTM_id = "ACSCEE"
}