Alfred Edward "Ted" Ringwood FRS FAA (19 April 1930 – 12 November 1993) was an Australian experimental

geophysicist Geophysics () is a subject of natural science concerned with the physical processes and properties of Earth and its surrounding space environment, and the use of quantitative methods for their analysis. Geophysicists conduct investigations acros ...

and

geochemist Geochemistry is the science that uses the tools and principles of chemistry to explain the mechanisms behind major geological systems such as the Earth's crust and its oceans. The realm of geochemistry extends beyond the Earth, encompassing the e ...

, and the 1988 recipient of the

Wollaston Medal The Wollaston Medal is a scientific award for geology and the highest award granted by the Geological Society of London, the oldest geological society in the world. The medal is named after William Hyde Wollaston, and was first awarded in 1831. I ...

. The mineral

ringwoodite Ringwoodite is a high-pressure phase of Mg2SiO4 (magnesium silicate) formed at high temperatures and pressures of the Earth's mantle between depth. It may also contain iron and hydrogen. It is polymorphous with the olivine phase forsterite (a ...

is named after him.

Early life and study

Ringwood was born in Kew, only child of Alfred Edward Ringwood. He attended Hawthorn West State School where he played cricket and

Australian Rules Australian football, also called Australian rules football or Aussie rules, or more simply football or footy, is a contact sport played between two teams of 18 players on an Australian rules football playing field, oval field, often a modified ...

football. In 1943 he was successful in gaining a scholarship to

Geelong Grammar School Geelong Grammar School is a private Anglican co-educational boarding and day school. The school's main campus is located in Corio on the northern outskirts of Geelong, Victoria, Australia, overlooking Corio Bay and Limeburners Bay. Establ ...

where he boarded. On matriculation, he enrolled in Geology a science degree at the

University of Melbourne The University of Melbourne (colloquially known as Melbourne University) is a public university, public research university located in Melbourne, Australia. Founded in 1853, it is Australia's second oldest university and the oldest in the state ...

where he held a Commonwealth Government Scholarship, and was awarded a resident scholarship at

Trinity College Trinity College may refer to: Australia * Trinity Anglican College, an Anglican coeducational primary and secondary school in , New South Wales * Trinity Catholic College, Auburn, a coeducational school in the inner-western suburbs of Sydney, New ...

. He represented the college and the university in football. He obtained First Class Honours degree in Geology and began a MSc degree in field-mapping and petrology of the Devonian Snowy River volcanics of northeastern Victoria, graduating with Honours in 1953. Ringwood then undertook a PhD, beginning an experimental study about the origin of metalliferous ore deposits, but later changed his research topic so as to apply geochemistry to an understanding of the structure of the Earth, in particular the mineralogical constitution of the Earth's mantle.

Germanate and Earth's mantle

In the late 1950s and 1960s Ringwood worked on

germanate In chemistry, germanate is a compound containing an oxyanion of germanium. In the naming of inorganic compounds it is a suffix that indicates a polyatomic anion with a central germanium atom, for example potassium hexafluorogermanate, K2GeF6.Eg ...

s. He discovered that they served as low-pressure analogue to high-pressure

silicate A silicate is any member of a family of polyatomic anions consisting of silicon and oxygen, usually with the general formula , where . The family includes orthosilicate (), metasilicate (), and pyrosilicate (, ). The name is also used ...

s. With this insight he was able to predict that the phase changes of the mantle minerals

olivine The mineral olivine () is a magnesium iron Silicate minerals, silicate with the chemical formula . It is a type of Nesosilicates, nesosilicate or orthosilicate. The primary component of the Earth's upper mantle (Earth), upper mantle, it is a com ...

and

pyroxene The pyroxenes (commonly abbreviated Px) are a group of important rock-forming inosilicate minerals found in many igneous and metamorphic rocks. Pyroxenes have the general formula , where X represents ions of calcium (Ca), sodium (Na), iron ( ...

should occur in the Transition Zone. At the

Australian National University The Australian National University (ANU) is a public university, public research university and member of the Group of Eight (Australian universities), Group of Eight, located in Canberra, the capital of Australia. Its main campus in Acton, A ...

he began experimental study of silicates at high pressure, and in 1959 demonstrated that the iron end-member of olivine indeed transformed to the denser

spinel Spinel () is the magnesium/aluminium member of the larger spinel group of minerals. It has the formula in the cubic crystal system. Its name comes from the Latin word , a diminutive form of ''spine,'' in reference to its pointed crystals. Prop ...

structure, as did numerous germanate and germanate-silicate solid solutions. In 1966, Ringwood and Alan Major, the technical officer who worked with him from 1964 to 1993, synthesised the spinel form of , Also in 1966, the transformation of pure

forsterite Forsterite (Mg2SiO4; commonly abbreviated as Fo; also known as white olivine) is the magnesium-rich Endmember, end-member of the olivine solid solution series. It is Isomorphism (crystallography), isomorphous with the iron-rich end-member, fayalit ...

(Mg₂SiO₄) to spinel-like phase was achieved. In 1969 a new mineral was discovered in fragments of the Tenham meteorite which had the same crystal structure as the high pressure spinel polymorph of olivine. This was the first time that Ringwood's predicted polymorph was found in nature. Honouring the importance of Ringwood's work the mineral was named

. A team from the

University of Alberta The University of Alberta (also known as U of A or UAlberta, ) is a public research university located in Edmonton, Alberta, Canada. It was founded in 1908 by Alexander Cameron Rutherford, the first premier of Alberta, and Henry Marshall Tory, t ...

have isolated terrestrial ringwoodite in a brown diamond specimen found in Brazil in 2008. Their research suggests the presence of water deep within the Earth's mantle.

Later life

In 1978, his ANU team invented

synroc Synroc, a portmanteau of "synthetic rock", is a means of safely storing radioactive waste. It was pioneered in 1978 by a team led by Professor Ted Ringwood at the Australian National University, with further research undertaken in collaboration wit ...

, a possible means of safely storing and disposing of radioactive waste. Ringwood died of

lymphoma Lymphoma is a group of blood and lymph tumors that develop from lymphocytes (a type of white blood cell). The name typically refers to just the cancerous versions rather than all such tumours. Signs and symptoms may include enlarged lymph node ...

on 12 November 1993 at the age of 63.

Honours

Ringwood received numerous honours and awards for his work. * 1972 Werner medal * 1974 Arthur L. Day Medal * 1974

William Bowie Medal The William Bowie Medal is awarded annually by the American Geophysical Union for "outstanding contributions to fundamental geophysics and for unselfish cooperation in research". The award is the highest honor given by the AGU and is named in honor ...

* 1975

Mueller Medal The Australian and New Zealand Association for the Advancement of Science (ANZAAS) is an organisation that was founded in 1888 as the Australasian Association for the Advancement of Science to promote science. It was modelled on the British ...

ANZAAS > Mueller Medal Recipients (1904-2005)
archive.is Retrieved 12 February 2025. * 1978

Matthew Flinders Medal and Lecture The Matthew Flinders Medal and Lecture of the Australian Academy of Science is awarded biennially to recognise exceptional research by Australian scientists in the physical sciences. Nominations can only be made by Academy Fellows. Recipients Sour ...

* 1985 Arthur Holmes Medal * 1988

* 1991

Feltrinelli Prize The Feltrinelli Prize (from the Italian "Premio Feltrinelli", also known as "International Feltrinelli Prize" or "Antonio Feltrinelli Prize") is an award for achievement in the arts, music, literature, history, philosophy, medicine, and physical a ...

* 1991

V. M. Goldschmidt Award The V. M. Goldschmidt Award is an award given by the Geochemical Society at the V. M. Goldschmidt Conference for achievements in the fields of geochemistry and cosmochemistry. The award in honor of Victor Moritz Goldschmidt, a pioneer in both thos ...

* 1992

Clarke Medal The Clarke Medal is awarded by the Royal Society of New South Wales, the oldest learned society in Australia and the Southern Hemisphere, for distinguished work in the Natural sciences. The medal is named in honour of the Reverend William Branwh ...

* 1993 Jaeger Medal * 1993 Harry H. Hess Medal ;Fellowships *1966

Fellow of the Australian Academy of Science The Fellowship of the Australian Academy of Science is made up of about 500 Australian scientists. Scientists judged by their peers to have made an exceptional contribution to knowledge in their field may be elected to Fellowship of the Academy ...

(FAA) *1969 Fellow, American Geophysical Union *1972

Fellow of the Royal Society Fellowship of the Royal Society (FRS, ForMemRS and HonFRS) is an award granted by the Fellows of the Royal Society of London to individuals who have made a "substantial contribution to the improvement of natural science, natural knowledge, incl ...

of London (FRS) *1972 Fellow, Meteoritical Society *1983 Honorary Foreign Fellow, European Union of Geosciences The

European Association of Geochemistry The European Association of Geochemistry (EAG) is a pan-European organization founded to promotes geochemical research. The EAG organizes conferences, meetings and educational courses for geochemists in Europe, including the Goldschmidt Conference w ...

quinquennially awards a

Science Innovation Award The Science Innovation Award is an award bestowed annually by the European Association of Geochemistry on a scientist who has made "a particularly important and innovative breakthrough in geochemistry", and consists of a medal and certificate. The s ...

medal named in his honour for work in petrology and mineral physics.

Selected publications

* *

Early life and study

Germanate and Earth's mantle

Later life

Honours

Selected publications

References

Further reading