Nature of the Chemical Bond

November 22, 1968

The Mössbauer effect gives information about electron density at the nucleus. One investigation (Boyhle, probably Phys. Rev. Letters about 1960) has given the electron density (of s electrons) for tin as largest in white tin, smaller in gray tin, and still smaller in triniobium tin.

I should check other results for possible mention in The Nature of the Chemical Bond.

November 22, 1968

Dr. Gustav Albrecht

271 East Loma Alta Drive

Altadena, California 91001

Dear Gus:

I am working on a problem of the structure of hydrated iron oxides, and in this connection the work of a man named Johansson (I think that this is the correct spelling) on the structure of some hydrated aluminum oxides containing also sulphate and selenate may be pertinent.

Would you look through the abstract journals for the past ten years to see if you can find any publications by this man on this subject, and make Xerox copies for me of those that you do?

It was a pleasure to see you looking so well. I hope that we shall be in Pasadena again before long, and can see you again.

Sincerely,

Linus

LP:jj