Arsenic

Specimen of Arsenic Arsenic is a chemical element, that has been feared since Antiquity due to its toxicity. Note that due to linguistic sloppiness, we apply the same term - arsenic - in English for the chemical element, that by itself is practically harmless, and for the oxide (i.e., arsenic oxide) much in vogue among crime authors to bump off rich aunts, scorned lovers, witnesses, and whoever else may be in the way. When we see Arsenic as specimens, it is usually massive black chunks or aggregates of globular masses, and it is quite characteristic to the trained eye. However, when freshly exposed in a mine, it is grey with a submetallic luster, and miners previously mistook it for valuable ore and sent it to the smelters, where it would burn to arsenic oxide, poisoning people, and obviously yielding no metal whatsoever. For this reason the globular variety, that was very abundant in German silver mines, was called 'Scherbenkobald' by the miners, 'Scherben' for shards, 'Kobolden' were vicious gnomes, and 'Kobald' something the Kobolden had made. This is obviously provided for your information only, do not try this at home, etc., and my web site is obviously only read by honourable people of good breed, but in case somebody else snug in through the back door: Don't even think of buying my Arsenic and bump off your aunt. In spite of arsenic's popularity in novels, it is one of the least desirable murder weapons. It is easily traced by any crime technician, even in minute amounts, and the flavour is absolutely disgusting! Fatal dose of arsenic in aunties glass of port? Forget it! Take the word of somebody who tasted it: you can not cover the flavour of one fatal dose of arsenic by all the curry consumed by the Indian army.

Specimen Handling

Arsenic is for all practical purposes stable in a normal household environment. It is not harmed by light, changes in temperature in the normal comfort range, or known to decompose. Arsenic specimens can be brittle and should be handled with care like any other mineral specimen. Arsenic is not appreciably soluble in water. Note that Arsenic, by itself, is not toxic - but 'by itself' is the tricky word, it is hardly ever by itself! Arsenic specimens often carry associate minerals of arsenic oxide (in the form of Arsenolite or Claudetite), that are toxic and should kept away from children and others prone to lick their rocks or not wash hands after handling specimens. Over time, Arsenic specimens may decompose slightly, and form a white coating of arsenic oxides.

Bibliography

Anthony, John Williams, Richard A. Bideaux, Kenneth W. Bladh & Monte C. Nichols. 1990. Handbook of mineralogy, vol. 1
Blackburn, William H. & William H. Dennen. 1997. Encyclopedia of mineral names. Canadian Mineralogist, special publication 1.
Gaines, Richard W., H. Catherine W. Skinner, Eugene E. Foord, Brian Mason, Abraham Rosenzweig & Vandall T. King. 1997. Dana's new mineralogy: the system of mineralogy of James Dwight Dana and Edward Salisbury Dana, 8th ed.
Hintze, Carl (ed.) 1898-1904. Handbuch der Mineralogie, vol. 1, section 1.
Noe-Nygaard, Arne. 1966. Mineralogi, 3rd ed.
Palache, Charles, Harry Berman & Clifford Frondel. 1944. The system of mineralogy of James Dwight Dana and Edward Salisbury Dana, Yale University 1837-1892, 7th ed. Vol. 1.
Ramdohr, Paul & Hugo Strunz. 1980. Klockmann's Lehrbuch der Mineralogie, 16th ed.
Roberts, Willard Lincoln, Thomas J. Campbell & George Robert Rapp jr. 1990. Encyclopedia of Minerals 2nd ed.


This page is written and maintaned by Claus Hedegaard