Timeline for David and Clara Shoemaker
| 1920 | David Paul Shoemaker is born on May 12 in Kooskia, Idaho, the eldest of five sons. His father, Roy H. Shoemaker, is a civil engineer. |
| 1921 | Clara Brink is born in Rolde, Holland on June 20. Her father is a minister in the Dutch Reformed Church, divorced from his first wife and remarried to the woman who becomes Clara's mother. As a result, Clara's family includes two older half-brothers and an older sister. |
| 1926 | David begins his early education in the Boise, Idaho public school system. |
| 1938 | David begins his undergraduate education at Reed College in Portland, Oregon. Supported by an interest-free government loan, Clara begins her higher education at the University of Leiden, majoring in chemistry and minoring in physics. |
| 1941 | Clara completes her undergraduate degree shortly before the Nazi occupation and subsequent closing of the University of Leiden. She then begins her graduate studies at the University of Utrecht - studying under Anton Eduard van Arkel - though she is often compelled to work from her parents' home as World War II spreads throughout Europe. |
| 1942 | David receives his B.A. in Chemistry from Reed College and moves to Pasadena to begin his graduate studies under the supervision of Linus Pauling at the California Institute of Technology. His research is divided between Pauling's expansive program of scientific war work and, later, a series of crystallographic investigations. While in Pasadena, David determines the structure of sixteen molecules, most notable among them threonine, an amino acid. |
| 1946 | With the conclusion of World War II, Clara completes her doctoral examinations. (Much of her course work has been conducted on her own, at her parents' home.) At A. E. van Arkel's suggestion, Clara assumes an assistantship at the University of Utrecht and begins learning the techniques of x-ray crystallography, studying for one day each week in Amsterdam under the renowned crystallographer Caroline MacGillavry. |
| 1947 | David receives his Ph. D in Chemistry from the California Institute of Technology. He is subsequently named a Guggenheim fellow, and studies abroad at both Oxford University and at the Institute for Theoretical Physics in Copenhagen, Denmark. Aged 27, he is among the youngest of his era to receive a Guggenheim Fellowship. |
| 1948 | Upon the completion of his one-year Guggenheim trip, David is named a Senior Research Fellow at Caltech. He solves the difficult structure of DL-serine and begins the research program that will come to define much of his career - a broad series of investigations into the structures of complex transition-metal phases. |
| 1950 | Clara receives her Ph. D. from the University of Utrecht and is hired by A. E. van
Arkel as an x-ray crystallographer at the University of Leiden. Her research focuses
on the crystal structures of monovalent ions. Later in the year, funded by an International Federation of University Women fellowship, Clara travels to Oxford to work for one year in Dorothy Hodgkin's laboratory. While there, Clara focuses on the crystal structure of vitamin B12. Her time at Oxford will result in three publications co-authored with Hodgkin, recipient of the 1964 Nobel Prize in Chemistry. |
| 1951 | David is hired by the Massachusetts Institute of Technology, under the title Assistant Professor in Chemistry. Along with his continuing interest in transition metals, David engages in a fruitful investigation of zeolite structures. |
| 1953 | Dissatisfied with the working environment at the University of Leiden, Clara takes a one-year leave of absence and travels to the Massachusetts Institute of Technology for purposes of working with David Shoemaker on the structure of transition metals. |
| 1954 | David renews Clara's leave of absence contract for a second year. |
| 1955 | On August 5, David Shoemaker and Clara Brink are married. After her wedding, Clara moves to Barbara Low's laboratory at Harvard Medical School. Low is an associate from Clara's tenure in Dorothy Hodgkin's laboratory. |
| 1956 | David is promoted to Associate Professor in Chemistry at M.I.T. On September 12, Clara gives birth to the couple's only child, a son named Robert. For two years, while caring for her infant son, Clara works from home on the International Tables of Crystallography. |
| 1959 | In October, Clara becomes a naturalized citizen of the United States. |
| 1960 | David is promoted to the rank of Professor in Chemistry at M.I.T. He also joins the U. S. National Committee for Crystallography, on which he will actively serve for fifteen years. |
| 1962 | David becomes Secretary-Treasurer of the U. S. National Committee for Crystallography. With Carl W. Garland and Jeffrey I. Steinfeld, David also publishes Experiments in Physical Chemistry, a widely-adopted laboratory text that runs through six editions. |
| 1964 | David is named Regional Co-editor of Acta Crystallographica. |
| 1967 | David is elected to a three-year term as President of the U. S. National Committee
for Crystallography. For six months, he also serves as Visiting Scientist at the University of Geneva's Laboratorie de Cristallographie. |
| 1970 | David is elected President of the American Crystallography Association. That same year, David and Clara relocate to Oregon State University, where David has been hired as Chairman and Professor of Chemistry. In reaction to the university's nepotism guidelines, Clara arranges to work as Research Associate under Dr. Ken Hedberg - like David Shoemaker, a former graduate student of Linus Pauling. The arrangement lasts for several years until the university's rules are relaxed. During his tenure as department chair, David overseas two major building projects - the construction of a new chemistry laboratory building and the renovation of the chemistry offices and research building. During her years at Oregon State, Clara trains several graduate students in techniques of x-ray crystallography, publishing papers with many of her protégés. |
| 1972 | David joins the Executive Committee of the International Union of Crystallography. |
| 1975 | David serves as visiting committee member of the Brookhaven National Laboratory. |
| 1978 | David serves as an evaluation panel member for the National Bureau of Standards, and also enjoys a second Visiting Scientist fellowship at the Laboratorie de Cristallographie. (He has enjoyed a productive collaboration with Erwin F. Bertaut in Grenoble) |
| 1979 | David is named Chairman of the Brookhaven National Laboratory. In June, he likewise serves as Visiting Lecturer at the Kemisk Institut in Aarhus, Denmark. |
| 1981 | David steps down as Chairman of Chemistry at Oregon State University. He remains Professor in Chemistry. |
| 1982 | Clara is promoted to Senior Research Professor. |
| 1984 | David retires from Oregon State University under the title Emeritus Professor in Chemistry, and Clara retires as Research Professor Emeritus. He and Clara continue their work on transition metal phases and enter into the emerging scientific conversation over the nature of quasicrystals. |
| 1995 | On August 24, David dies of kidney failure in Corvallis, Oregon, aged 75. He is survived by Clara Shoemaker and their son, Robert. Over the course of their professional association, David and Clara publish thirty-six scientific papers together. |
| 2009 | On September 30, at age 88, Clara succumbs to cancer. |
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