Dr. Charles Louis Christ, 64, a research geochemist with the U.S. Geological Survey who retired in 1979 after 30 years of service, died at Stanford University Hospital in Palo Alto, Calif., June 29 following a heart attack.

Dr. Christ was born in Baltimore and earned his undergraduate and doctoral degrees at Johns Hopkins University. He taught at Johns Hopkins and Wesleyan universities and during World War II was director of the War Research Laroratory at Johns Hopkins. He was in private industry after the war until he joined the Geological Survey in Washington in 1949.

His specialties were borate chemistry and mineralogy and he laid down the structural principles of this group of minerals. The principles are called "Christ's Rules."

Dr. Christ helped organize and direct the Geological Survey's X-ray diffraction and crystal structure analysis program and later was cheif of its branch of experimental geochemistry and mineralogy.

In 1965, he and Robert M. Garrells published "Solutions, Minerals and Equilibria," now a standard work on mineral geochemistry. Dr Christ also contributed numerous papers to professional scientific journals.

The year that his book was published, Dr. Christ was transferred to the Geological Survey's western regional center at Menlo Park, Calif. There he continued his work in crystallography and minerals until his retirement.

In 1957, Dr. Christ received the Outstanding Performance Award from the Geological Survey. He was a research fellow at Harvard University in 1959-1960 and received the Rockefeller Public Service Award in 1959. He taught at George Washington University from 1956 to 1965 and was a consultant in geochemistry for its graduate council from 1956 to 1966. He was a visiting professor at the University of Hawaii in 1972.

Dr. Christ was a fellow of the Mineralogical Society of America and of the Geological Society of America and a member of the American Crystallographic Association and the American Association for the Advancement of Science.

Survivors include his wife, Gertrude, of Menlo Park; three sisters, Sue Asher, Mildred Witt and Eleanor Bertling, all of Baltimore, and a brother, John, also of Baltimore.