Dr. S. T. Gross
Department of Chemistry
University of Illinois
Urbana, Illinois
Dear Dr. Gross:
Dr. Sturdivant and I have read your manuscript on Pb8O4, which I am now returning to you. It seems to us that it is not satisfactory as a structure determination, and I think that you should do some further work on the crystal before publishing the results.
My principal objection is that the agreement between the observed and calculated intensities is really very poor, and can not be considered to prove the correctness of your suggested structure. I see no reason for the calculated intensity values to be given on such a low scale. Why not give them to at least two significant figures? Also no (OOl) data are given. Those should be used to evaluate z. Many basal reflections are absent if z is really 1/4. I think that you should determine the density since the literature value differs appreciably from the x-ray value.
With best regards, I am
Sincerely yours,
Linus Pauling
LP/jr
Enclosure
December
5, 1939
