Pitchblende is a mineral also known as uraninite, which historically was used as a source of uranium. The word is spelled /ˈpɪtʃˌblɛnd/, with stress on the first syllable and a silent 'e' at the end. The first syllable is pronounced like the word 'itch' with a 'p' sound at the beginning. The second syllable contains the 'ch' sound at the end and is pronounced like the word 'blend'. The word originated in German, where 'Pechblende' meant "pitch-black ore".
Pitchblende is a naturally occurring mineral that is known as the primary source of uranium. It is a complex and relatively rare mineral form of uranium oxide, with the chemical formula U3O8. The name "pitchblende" originates from the German words "pitch" meaning black, and "blende" meaning blind or deceptive, hinting at its initial misidentification as a lead ore due to its dark appearance.
Pitchblende is characterized by its dark or black color, high density, and a greasy or pitch-like texture. It typically forms in hydrothermal veins and granite pegmatites, as well as in association with other minerals such as quartz, feldspar, and mica. The mineral's color is a result of its high uranium content, which also gives it its radioactive properties.
Due to its high uranium concentration, pitchblende is of crucial importance in nuclear energy and various industrial applications. It played a significant role in the discovery of radioactivity by Marie and Pierre Curie in the late 19th century, leading to their subsequent isolation of radium and polonium. Pitchblende is mainly mined for its uranium content, which is used as fuel in nuclear reactors, for the production of nuclear weapons, and in various medical and scientific research applications.
Despite its importance and value, handling pitchblende requires caution and protective measures due to its inherent radioactivity.
Uraninite, a substance of pitch-like appearance chiefly uranium oxide, the main source of radium.
A practical medical dictionary. By Stedman, Thomas Lathrop. Published 1920.
A blackish ore of uranium and iron.
Etymological and pronouncing dictionary of the English language. By Stormonth, James, Phelp, P. H. Published 1874.
The word "pitchblende" has its roots in the German language. It is derived from the combination of two words: "Pech" meaning pitch or tar, and "blende" meaning mineral or ore.
The term was first used in the early 18th century by German miners to describe a black, pitch-like mineral that they encountered while extracting silver. The term "blende" was commonly used to refer to a rock or ore that resembled certain minerals.
The mineral pitchblende was later found to be a significant source of uranium, and its radioactive properties were discovered. This eventually led to the understanding of radioactivity and the development of nuclear science.