1967 . , (Hanneman, Strong, Bundy, 1967), , , . 6u. : 000, 003/8, 1/3 2/3 1/2, 1/3 2/3 7/8. : = 2,52 Ǻ = 4,12Ǻ. . 3.

(Frondel, Marvin, 1967) - .


. 13. ( Wright, 1965)

, , ( ., 1972), , . (Bundy, 1967), .

1970 . (Kawai, 1970), 660