Irma Jean Corcoran, 40, a music teacher at the Pixleland-Pinecrest School in Alexandria for the past seven years, died of a heart attack April 7 at Arlingotn Hospital.

Before moving to Virginia she sang for three seasons with the St. Louis Municipal Opera Company.

In 1955, at the end of the Korean War, she toured Korea, Japan and the Caribbean as a singer with the Belies of Indians, a pop singer group.

Mrs. Cocoran's husband, M/Sgt. Kenneth B. Corcoran, said his wife sang to soldiers, orphans and the former president of Korea, Syngman Rhee.

A graduate of the Indiana University's school of music, Mrs. Corcoran majored in vocal music.

She was a vocalist, a planist and an organizt, according to her husband.

During her college career she was a member of the Phi Beta Kappa, the Mortar Board, an honorary academic society for senior women; Economene, a national organization for academically outstanding sophomores, and Sigma Alpha Iota, an honorary academic society for women studying music.

After teaching music in Brown County, Ind. during her first year of marriage, Mrs. Corcoran moved to Virginia. She began teaching at Pixieland-Pinecrest School in 1970.

Her husband is a tenor soloist in the U.S. Army Band and is group leader of the tenor section of the U.S. Army Chorus.

Beside her husband, Mrs. Corcoran is survived by five sons, Stephen Bradley, Jeffery Stuart, Michael Blake, Gregory Alan, and Shawn Patrick, all of the home in Fairfax, and her mother and father, Mr. and Mrs. George Batley of Winchester, Ill.