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During
Brauner's time with Roscoe at the University of Manchester, he became interested in the chemistry of the rare earth elements. A theme of his investigations was the determination of their relative positions in the periodic table. One method he used to separate these elements was
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ten years before the existence of the gap was confirmed experimentally (although the element was still undiscovered). In the 1880s, when he already had started lecturing in Prague, he still competed internationally in cycling races.
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Brauner authored the chapter on rare earth elements in
Mendeleev's textbook "Principles of Chemistry". He also wrote the portion on atomic weights in "Handbuch der Anorganischen Chemie", which was a textbook authored principally by
190:. Brauner became lecturer for chemistry at the Charles University of Prague in 1883, assistant professor as of 1890, and full professor as of 1897. During the course of his career, he corresponded frequently with
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to observe two groups of absorption bands, one blue (A = 449–443) and one yellow (A = 590–568). He concluded that didymium was actually a mixture of two rare earth elements. However, it was
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Brauner's investigations into the rare earth elements and their atomic weights depended on purity of the compounds under evaluation. This caused ambiguity at times. He proposed that the element
31:
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experimentally confirmed
Brauner's prediction in 1914, identifying the gap between their nuclear charges. The missing element was eventually synthesized in 1945 and named
256:, although he acknowledged that his evaluation of tellurium could be based on mixtures of metals. Later, Brauner obtained samples of the substance referred to as
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635:"Die wissenschaftliche Welt des Carl Auer von Welsbach: seine bedeutendsten Lehrer, Kollegen und Mitarbeiter"
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Laing, Michael (2005). "A Revised
Periodic Table: With the Lanthanides Repositioned".
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who recognized that didymium was actually a mixture of the two rare earth elements
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19th century Czech chemist, investigated atomic weights and rare earth elements
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Brauner retired from the
Charles University of Prague in 1925 and died of
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519:"Rediscovery of the elements: The Rare Earths–The Confusing Years"
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Fontani, Marco; Costa, Mariagrazia; Orna, Mary
Virginia (2015).
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346:"Rediscovery of the elements: The Rare Earths–The Last Member"
161:. Brauner predicted the existence of the rare earth element
640:. Forum Naturwissenschaftlicher Unterricht. Archived from
406:(6th ed.). Easton, PA: Journal of Chemical Education.
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As part of his investigations on the chemistry of the
612:. Oxford University Press. pp. 39–40, 175, 241.
584:"Elementymology & Elements Multidict: promethium"
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The Lost
Elements: The Periodic Table's Shadow Side
517:Marshall, James L.; Marshall, Virginia R. (2015).
344:Marshall, James L.; Marshall, Virginia R. (2016).
322:Collection of Czechoslovak Chemical Communications
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605:
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343:
418:"Bohuslav Brauner's Palmares ar CyclingRanking"
194:, and they influenced each other as models for
145:(May 8, 1855 – February 15, 1935) was a
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293:Brauner received honorary memberships to the
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318:Recueil des Travaux Chimiques des Pays-Bas
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374:Cantrill, Stuart (November 21, 2018).
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489:"Prof. Bohuslav Brauner, Obituary"
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320:honored him in 1925 as did the
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432:"Bohuslav Brauner (1855–1935)"
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260:. In 1882, he was able to use
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702:Chemists from Austria-Hungary
403:The discovery of the elements
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252:had an atomic weight of 125
131:Charles University in Prague
89:Charles University in Prague
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400:Weeks, Mary Elvira (1956).
196:periodicity of the elements
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442:(4462): 796. May 7, 1955.
303:Societe Chimique de France
295:Chemical Society of London
697:Charles University alumni
561:10.1007/s10698-004-5959-9
498:: 497–498. March 30, 1935
299:American Chemical Society
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174:Brauner was a student of
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549:Foundations of Chemistry
314:University of Manchester
209:Scientific contributions
188:University of Manchester
180:University of Heidelberg
582:van der Krogt, Peter.
267:Carl Auer von Welsbach
707:Czechoslovak chemists
687:Rare earth scientists
420:. CyclingRanking.com.
380:Chemical connections
376:"Promethium unbound"
151:University of Prague
448:1955Natur.175U.796.
155:rare earth elements
121:Inorganic chemistry
104:Rare-earth elements
619:978-0-19-938334-4
310:Doctor of Science
254:atomic mass units
149:chemist from the
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111:Scientific career
98:Determination of
62:February 15, 1935
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143:Bohuslav Brauner
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85:Alma mater
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633:Soukup, R. W.
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555:(3): 203–233.
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100:atomic weights
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95:Known for
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66:(aged 79)
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649:. Retrieved
642:the original
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357:. Retrieved
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271:praseodymium
262:spectroscopy
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220:
216:fluorination
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184:Henry Roscoe
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127:Institutions
110:
64:(1935-02-15)
677:1935 deaths
672:1855 births
532:30 December
526:The Hexagon
385:30 December
359:30 December
353:The Hexagon
223:lanthanides
77:Nationality
666:Categories
651:2020-02-10
589:2008-08-20
502:8 February
328:References
243:promethium
163:promethium
48:8 May 1855
44:1855-05-08
324:in 1930.
305:, and an
275:neodymium
250:tellurium
227:neodymium
205:in 1935.
203:pneumonia
569:97792365
307:honorary
301:and the
258:didymium
231:samarium
528:: 72–77
466:4269832
444:Bibcode
233:in the
186:at the
178:at the
616:
567:
496:Nature
464:
436:Nature
316:. The
297:, the
289:Honors
170:Career
117:Fields
70:Prague
52:Prague
645:(PDF)
638:(PDF)
565:S2CID
522:(PDF)
492:(PDF)
462:S2CID
355:: 4–9
349:(PDF)
147:Czech
80:Czech
614:ISBN
534:2019
504:2020
387:2019
361:2019
273:and
229:and
59:Died
38:Born
557:doi
452:doi
440:175
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