Solution heights were adjusted to criticality with D 2 O solutions at D / 235 U atomic ratios of 1 : 230 and 1 : 419 in the smaller tank and 1 : 856 to 1 : 2081 in the larger tank.
12.
A Kendrick mass analysis is often used in conjunction with a Van Krevelen diagram, a two-or three-dimensional graphical analysis in which the elemental composition of the compounds are plotted according to the atomic ratios H / C, O / C, or N / C.
13.
Although sodium and potassium are always present in naturally occurring nepheline in approximately the atomic ratio ( 3 : 1 ), artificially prepared crystals have the composition NaAlSiO 4; the corresponding potassium compound, KAISiO 4, which is the mineral kaliophilite, has also been prepared artificially.
14.
Redfield s analysis of the empirical data led to him to a startling discovery : across and within the three oceans and Barents Sea, seawater had the N : P atomic ratio near 20 : 1 ( later corrected to 16 : 1 ), and was very similar to the average N : P in plankton.
15.
Some early workers who did not know the structure, such as Hsien Wu, called it phospho-24-tungstic acid, formulating it as 3H 2 O . P 2 O 5 24WO 3.59H 2 O, ( P 2 W 24 O 80 H 6 ) . 29H 2 O, which correctly identifies the atomic ratios of P, W and O . This formula was still quoted in papers as late as 1970.
