Per Adolf Geijer (born

7 May Events Pre-1600 * 351 – The Jewish revolt against Constantius Gallus breaks out after his arrival at Antioch. * 558 – In Constantinople, the dome of the Hagia Sophia collapses, twenty years after its construction. Justinian I immed ...

1886 Events January–March * January 1 – Upper Burma is formally annexed to British Burma, following its conquest in the Third Anglo-Burmese War of November 1885. * January 5– 9 – Robert Louis Stevenson's novella ''Strange ...

Svealand Svealand (), or Swealand, is the historical core region of Sweden. It is located in south central Sweden and is one of three historical lands of Sweden, bounded to the north by Norrland and to the south by Götaland. Deep forests, Tiveden, ...

, died

18 April Events Pre-1600 * 796 – King Æthelred I of Northumbria is murdered in Corbridge by a group led by his ealdormen, Ealdred and Wada. The ''patrician'' Osbald is crowned, but abdicates within 27 days. *1428 – Peace of Ferrara b ...

1976 Events January * January 3 – The International Covenant on Economic, Social and Cultural Rights enters into force. * January 5 – The Pol Pot regime proclaims a new constitution for Democratic Kampuchea. * January 11 – The 1976 Phil ...

Danderyd Danderyd Municipality (''Danderyds kommun''; ) is a municipality north of Stockholm in Stockholm County in east central Sweden. It is one of the smallest municipalities of Sweden, but the most affluent. Its seat is located in Djursholm and it ...

) was a Swedish

geologist A geologist is a scientist who studies the solid, liquid, and gaseous matter that constitutes Earth and other terrestrial planets, as well as the processes that shape them. Geologists usually study geology, earth science, or geophysics, alt ...

mineralogist Mineralogy is a subject of geology specializing in the scientific study of the chemistry, crystal structure, and physical (including optical) properties of minerals and mineralized artifacts. Specific studies within mineralogy include the proces ...

, and professor. He was a member of the

Geijer family Geijer () is a Swedish family. According to the tradition, it immigrated from Austria in the early 17th century. The family includes the noble branches af Geijerstam and von Geijer. The ''af Geijerstam'' branch is descended from Emanuel af Geijer ...

(son of Gottschalk Geijer, grandson of Per Adolf Geijer and grandfather of

Per Olof Nisser Per is a Latin Preposition and postposition, preposition which means "through" or "for each", as in per capita. Per or PER may also refer to: Places * IOC country code for Peru * Pér, a village in Hungary * Chapman code for Perthshire, histor ...

). Geijer received his

doctoral degree A doctorate (from Latin ''docere'', "to teach"), doctor's degree (from Latin ''doctor'', "teacher"), or doctoral degree is an academic degree awarded by universities and some other educational institutions, derived from the ancient formalism '' ...

and was named as an associate professor of

petrography Petrography is a branch of petrology that focuses on detailed descriptions of rocks. Someone who studies petrography is called a petrographer. The mineral content and the textural relationships within the rock are described in detail. The classi ...

Stockholm University Stockholm University ( sv, Stockholms universitet) is a public research university in Stockholm, Sweden, founded as a college in 1878, with university status since 1960. With over 33,000 students at four different faculties: law, humanities, s ...

in 1910. He undertook a trip to North America in 1913 to study mining operations there and in 1916 became a state geologist at the

Swedish Geological Survey Geological Survey of Sweden ( sv, Sveriges geologiska undersökning, SGU) is a Swedish government agency that was founded in 1858 dealing with questions about the nature of the geological and mineral management in Sweden. The institution has the ...

(SGU). He was professor of mineralogy and geology at the

Royal Institute of Technology The KTH Royal Institute of Technology ( sv, Kungliga Tekniska högskolan, lit=Royal Institute of Technology), abbreviated KTH, is a public research university in Stockholm, Sweden. KTH conducts research and education in engineering and technol ...

from 1931 to 1941 and

director general A director general or director-general (plural: ''directors general'', ''directors-general'', ''director generals'' or ''director-generals'' ) or general director is a senior executive officer, often the chief executive officer, within a governmen ...

and head of SGU from 1942 to 1951. His works dealt mainly with Sweden's

ore Ore is natural rock or sediment that contains one or more valuable minerals, typically containing metals, that can be mined, treated and sold at a profit.Encyclopædia Britannica. "Ore". Encyclopædia Britannica Online. Retrieved 7 April ...

s and the geological conditions under which they occur. His works deal with the ore fields at Kirunavaara,

Luossavaara Luossavaara (Northern Sami: ''Luossavárri'') is a mountain in Kiruna, Sweden. It is the site of a now-inactive iron ore mine formerly operated by the Swedish mining company LKAB. Today it has a ski lift and slope, as well as a hiking path calle ...

, Tuollavaara and in Falutrakten. Geijer was elected in 1934 as a member of the

Royal Swedish Academy of Engineering Sciences The Royal Swedish Academy of Engineering Sciences or ''Kungliga Ingenjörsvetenskapsakademien'' (IVA), founded on 24 October 1919 by King Gustaf V, is one of the royal academies in Sweden. The academy is an independent organisation, which pro ...

and in 1939 became a member of the Royal Swedish Academy of Sciences. He was awarded the

Brinell Medal The Brinell scale characterizes the indentation hardness of materials through the scale of penetration of an indenter, loaded on a material test-piece. It is one of several definitions of hardness in materials science. History Proposed by Sw ...

in 1961 together with Nils H. Magnusson. The mineral

perite Perite is a mineral that has a general chemical formula of Pb Bi O2 Cl. The name is given for Per Adolf Geijer, a Swedish economic geologist with the Geological Survey of Sweden, who discovered the mineral in 1960 outside of Langban, Sweden. P ...

, discovered in Långban, Sweden in 1960, was named in his honor.

Sources

Geijer, Per
in '' Nordisk familjebok'' (second edition supplement, 1923)
Geijer, Per
in ''

Vem är det ''Vem är det'', with the subtitle ''Svensk biografisk handbok'', is a Swedish "Who's Who" biographical reference publication which has been published in 46 editions since 1912 Events January * January 1 – The Republic of China (19 ...

1943''

Notes

{{DEFAULTSORT:Geijer, Per 20th-century Swedish geologists Swedish mineralogists Geological Survey of Sweden personnel Swedish civil servants Per

See also

Sources

Notes