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[ Sources: Freiherr von Reichenstein | Tinctures ]
No blazon : J. Wilke based the above rendition entirely on the graphical sources quoted. He noticed that the central crest is a canting element for "Reichenstein", representing an Austrian Imperial Eagle (Reich = Empire) holding a stone (Stein). The Austrian Eagle is armed and legged Or, which is how Wilke represented it in the crest. However, he chose to avoid the tincture problem of the Austrian Imperial arms themselves (Or on Or) by letting the eagle on the shield be crowned, armed and legged Gules instead. (Actually, the Reichenstein eagle might have been legged Sable.)
Baron Franz-Joseph Müller von Reichenstein (1742-1825) was born on Poysdorf, Niederösterreich (Lower Austria) on October 4, 1742. His 250th birthday was duly commemorated in 1992 by an Austrian stamp.Incidentally, this serves to invalidate officially many reports that he would have been born instead on July 1, 1740 in Transylvania, at Nagyszeben (Hermannstadt).
In Hungarian, Franz-Joseph Müller was known as Müller F. József. He became the main overseer of Transylvanian mines and took it upon himself to analyze a bluish gold ore known as German Gold. In 1782, he found that mineral to contain no antimony (121.76 g/mol) against previously accepted wisdom. Instead, he first suggested that the ore might be gold and bismuth sulphide. In 1783, however, he came to the firm conclusion that a new chemical element (127.6 g/mol) was involved, which he dubbed metallum problematicum [sic!]. Von Reichenstein then sent samples for confirmation to the University of Uppsala in Sweden, where the renowned Swedish chemist and mineralogist Torbern Bergman (1735-1784) died before he could complete the analysis...
Twelve years later, samples were forwarded to the German chemist Martin Heinrich Klaproth (1743-1817) who confirmed isolation of a new element before the Academy of Sciences of Berlin, on January 25, 1798. Klaproth started to investigate the chemical properties of that new element, which he called Tellurium, and gave Müller von Reichenstein full credit for the discovery. He did not mention the Hungarian chemist Paul Kitaibel (1757-1817), who had discovered the new element independently in 1789 and had handed over his report to Klaproth in 1796.
Tellurium (Te, Z=52) is actually a semiconductor chemically similar to Selenium (Se, Z=34) and radioactive Polonium (Po, Z=84). With Oxygen (O, Z=8) and Sulphur (S, Z=16) all those elements are in the same column of the periodic table and are collectively known as chalcogens.
Tellurium | Wikipedia