Johann Reinhard Blum (28 October 1802,
Hanau
Hanau () is a town in the Main-Kinzig-Kreis, in Hesse, Germany. It is located 25 km east of Frankfurt, Frankfurt am Main and is part of the Frankfurt Rhine-Main, Frankfurt Rhine-Main Metropolitan Region. Its Hanau Hauptbahnhof, station is a ...
– 21 August 1883,
Heidelberg) was a German
mineralogist.
From 1821 he studied at the universities of
Heidelberg and
Marburg, receiving his
habilitation
Habilitation is the highest university degree, or the procedure by which it is achieved, in many European countries. The candidate fulfills a university's set criteria of excellence in research, teaching and further education, usually including a ...
for mineralogy in 1828. In 1838 he became an associate professor, and in 1856, a full professor of mineralogy at the University of Heidelberg. For many years he was director of the university's mineral collection.
[J. Reinhard Blum]
The Mineralogical Record In 1871 he was a founding member of the ''Oberrheinischen Geologischen Vereins'' (Upper Rhine Geological Association).
He is best remembered for his pioneer research of
pseudomorphs, and was the author of a landmark textbook on the subject, titled "''Die Pseudomorphosen des Mineralreichs''" (1843). In his studies on the origins of pseudomorphs he was among the first to demonstrate the significance of chemistry in several pseudomorphic processes.
[ In 1861 he described the mineral rösslerite, named in honor of its discoverer, ]Karl Rössler
Karl Rössler (6 May 1788, in Wiesbaden – 23 August 1863, in Hanau) was a German manufacturer and mineralogist.
After a business apprenticeship in Frankfurt am Main, he acquired in 1818 a hat factory, which he transformed into a highly succe ...
. With chemist Friedrich Wilhelm Hermann Delffs, he described leonhardite, a name given for a partially dehydrated, opaque laumontite. He was elected as a member to the American Philosophical Society in 1882.
Selected works
* ''Lehrbuch der Oryktognosie'', 1832 – Textbook of oryctognosy (a former name for mineralogy).
* ''Taschenbuch der Edelsteinkunde für Mineralogen, Techniker und Juweliere'' (as editor, 1834) – Gemology for mineralogists, technicians and jewelers.
* ''Lithurgik, oder Mineralien und Felsarten'', 1840 (a detailed economic mineralogy).
* ''Die Pseudomorphosen des Mineralreichs'', 1843 – Pseudomorphs of the mineral kingdom; Blum's magnum opus.
* ''Die Einschlüsse von Mineralien in Krystallisirten Mineralien'', 1854 – The inclusions of minerals in crystallized minerals.[
* ''Handbuch der lithologie oder gesteinlehre'', 1860 – Handbook of ]lithology
The lithology of a rock unit is a description of its physical characteristics visible at outcrop, in hand or core samples, or with low magnification microscopy. Physical characteristics include colour, texture, grain size, and composition. Lit ...
.
* ''Dritter Nachtrag zu den Pseudomorphosen des Mineralreichs'', 1863 – Third addendum on pseudomorphs of the mineral kingdom.
* ''Die mineralien nach den krystallsystemen geordnet'', 1866 – Minerals according to the ordered crystal system.HathitTrust Digital Library
published works
References
External links
*
{{DEFAULTSORT:Blum, Johann Reinhard
1802 births
1883 deaths
People from Hanau
Heidelberg University alumni
Academic staff of Heidelberg University
University of Marburg alumni
German mineralogists
Crystallographers