Frank Coe, 73, a former Treasury Department official who was involved in Communist conspiracy charges in the early 1950s, died June 2 in Peking, China.

Death was attributed to a pulmonary embolism, according to his brother, Charles J. Coe of New York City, who said Frank Coe had been operated on for cancer eight months earlier.

Frank Coe was asked to resign in 1952 as secretary of the International Monetary Fund after he took the Fifth Amendment and refused to answer questions on communism and espionage before a Senate Internal Security Subcommittee.

He had been accused along with others, including Harry Dexter White, former assistant secretary of the Treasury, who died during the inquiry.

Four years later, Mr. Coe dropped the protection of the Fifth Amendment to state in open session before the subcommittee:

"I was never a spy. I am convinced that Harry White was not a spy and that any notion to the contrary is unthinkable." However, he refused to say if he was or ever had been a Communist.

He went to China in 1958, and since then had worked there as a research fellow at the Academy of Social Sciences attached to the Institute of World Economics and the Institute of Economics.

Mr. Coe was born in Richmond. He was a graduate of the University of Chicago, where he also did post graduate work.

Before joining the Treasury Department in 1934, he was with the staffs of the Johns Hopkins Institute of Law, the University of Chicago and the Brookings Institution.

In 1939, Mr. Coe became economic adviser to the Federal Security Agency. Later he was financial adviser to the National Security Council, special assistant to the U.S. Embassy in London, assistant to the director of the Board of Economic Warfare, assistant administrator of the Foreign Economic Administration and director of monetary research in the Treasury Department.

He became secretary of the International Monetary Fund in 1946.

His first marriage to Nora Mallinson ended in divorce. They had two children, Elizabeth and Robert, who survive.

Also surviving are his second wife, the former Ruth Evans, and their two children, Katy and Ling-ling.