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Jakob Beckenkamp
BECKENKAMP, Jakob.

BECKENKAMP, Jakob.
(1855 - 1931)

(Born: Horcheim near Coblenz, Germany, 20 February 1855; Died: Würzburg, Germany, 12 January 1931) German mineralogist.

In 1872, Beckenkamp helped as a surveyor in remapping the Wiesbaden district of Germany. From 1876-9, he entered the University of Bonn, where he studied mathematics, physics and chemistry. Afterwards, he attended the University of Strasbourg, where he studied crystallography under P. Groth, graduating 1881. Beckenkamp worked for a time on a geological survey of Elsass-Lothringen, but in 1897, he became professor of mineralogy and geology at the University of Würzburg, from which he retired in 1929. His principle research was on physical crystallography dealing with thermal, elastic, magnetic and electrical properties of crystals.

Biographical references: Centralblatt für Mineralogie: Series A (1931), 257-69 [by E. Schiebold]. DBA: II 86, 7-18. Mineralogical Magazine: 23 (1933), no. 141, 342-3. NDB: 1, 710 [by W. Fischer]. Poggendorff: 4, 84-5 & ???. Sarjeant, Geologists, 1980: 2, 518. WBI. World Who's Who in Science: 139.

Kristalltheorien, 1913

1. German, 1913-5.
Statische und kinetische | Kristalltheorien | von | Dr. J. Beckenkamp | [...2 lines of titles and memberships...] | [rule] | Erster Teil | Geometrische Eigenschaften der Kristalle | und deren | Veranschaulichung durch geometrische Strukturbilder | Mit 303 Textabbildungen. | [rule] | Berlin | Verlag von Gebrüder Borntraeger | W35 Schöneberger Ufer 12a | 1913.

[Title of part 2 reads:]

Statische und kinetische | ... | Zweiter Teil | Theorie der Ausbreitung der Energie in Kristallen durch Strahlung | (Kristalloptik) | und | Veranschaulichung der optischen Eigenschaften der kristallisierten | Kieselsäure durch statische Strukturbilder | Mit 487 Textfiguren und 7 Stereoskopbildern | [rule] | ... | 1915.

2 vols. [Vol 1] 8°: [i]-viii, [1]-206, [2] p., 303 illus.; [Vol 2] 8°: [i]-xii, [1]-670, [2] p., 487 illus., in back pocket, 7 stereo plates depicting atomic structures in crystals. Page size: 242 x 154 mm.

Contents: [Vol 1] [i-ii], "J. Beckenkamp | Statische und kinetische | Kristalltheorien," verso blank.; [iii-iv], Title page, verso "Alle Rechte, | ..."; [v]-vi, "Vorwort"-signed J. Beckenkamp, November 1912.; [vii]-viii, "Inhaltsverzeichnis."; [1]-206, Text.; [2 pgs], Advertisements.

[Vol 2] [i-ii], Half title page, "J. Beckenkamp | Statische und kinetische | Kristalltheorien," verso blank.; [iii-iv], Title page, verso "Alle Rechte, | ..."; [v]-vi, "Vorwort"-signed J. Beckenkamp, August 1915.; [vii]-xii, "Inhaltsverzeichnis."; [1]-646, Text.; [647]-670, Name and subject indexes.; [1 pg], Errata.; [1 pg], Advertisements.

Scarce. A comprehensive treatise, providing extensive discussion of the most current knowledge of crystallography. The first part covers the `static' properties of crystals and theoretical discussions of the internal geometric structure. Included in this portion are discussions of previous theories including Haüy, Weiss, Hessel, notational systems, twins, pseudomorphs, thermal, elastic, magnetic and electrical properties of crystals, etc. The second part details `kinetics' of crystals, or their behavior when interacting with light or other forms of radiation. Discussion includes crystal optics, with historical perspectives, goniometers, physical properties, theories of the arrangements of atoms within crystals, also touching on the recent discoveries of Von Laue and Bragg in X-ray crystal diffraction analysis. At the conclusion are comprehensive indexes to both parts.

Bibliographical references: Dana's 7th (Bibliography): 66. Mineralogical Magazine: 19 (1922), 115 [by L.J. Spencer].

2. German, 1919.
Leitfaden der Kristallographie | von | Dr. J. Beckenkamp | [...2 lines of titles and memberships...] | [rule] Mit 549 Textabbildungen | [rule] | Berlin | Verlag von Gebrüder Borntraeger | W35 Schöneberger Ufer 12a | 1919.

8°: [i]-xii, [1]-466, [2], 1-12 p., 549 illus. Page size: 240 x 154 mm.

Contents: [i-ii], Title page, verso "Alle Rechte, | ..."; [iii]-v, "Vorwort."-signed J. Beckenkamp, January 1919.; [vi], Blank.; [vii]-xii, "Inhaltsverzeichnis."; [1]-448, Text.; [449]-466, "Sachregister."; [1 pg], "Anzeigenanhang."; [1 pg], Contents of the the following advertisements.; 1-12, Advertisements for various equipment manufacturers.

Scarce. This Manual of Crystallography is more or less an abridgement of the author's Statische und Kinetische Kristalltheorien (Berlin, 1913-5), omitting almost all of the historical perspective. Divided into six parts, this is a superb introduction to crystallographic science, however. In the first portion, Beckenkamp covers in detail the cubic, tetragonal, rhombohedral, monoclinic, triclinic and hexagonal systems, with descriptions of the crystal classes that occurs under each heading. The second part describes dielectric and magnetic phenomena that result from atomic arrangements within some crystals. The third section describes how piezo- and pyro-electrical properties occur by either rubbing or heating certain mineral crystals. A fourth section (pp. 141-278) describes optical properties of crystals, including reflection, interference patterns, double refraction, polarization, luminence, etc. The fifth part (pp. 279-330) describes the influence of mechanical, thermal and chemical properties on the geometric and physical properties of crystals. The sixth and final section (pp. 331-443) covers structural theory and how it affects the geometric and physical properties of crystals. An errata to the author's previous Statische und Kinetische Kristalltheorien and a comprehensive subject index help conclude the work.

Bibliographical references: Mineralogical Magazine: 19 (1922), 115 [by L.J. Spencer].

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