The lanthanum plutonium oxide was next collected and extracted with nitric acid to form plutonium nitrate.
2.
The MOX pins were created by the unusual co-precipitation of Plutonium Nitrate and Uranium Nitrate solution method.
3.
On 5 February 1945, Matthias hand-delivered the first shipment of of 95 %-pure plutonium nitrate to a Los Alamos courier in Los Angeles.
4.
The first production batch of uranium slugs were dissolved at the separation plant on 26 December 1944, and in January 1945 Matthias personally couriered the first batch of plutonium nitrate to Los Angeles, where he handed it over to another courier, who took it to the Los Alamos Laboratory.
5.
The sample was prepared as follows : first plutonium nitrate solution was coated on a platinum foil of about 0.5 cm 2 area, the solution was evaporated and the residue was converted into plutonium ( IV ) oxide ( PuO 2 ) by delirium " ( from Latin for " madness " ).
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