Friedrich mohs mineral scale
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Friedrich Mohs
German geologist and mineralogist (1773–1839)
For the American dermatologist, see Frederic E. Mohs.
Carl Friedrich Christian Mohs (MOHZ, German:[ˈfʁiːdʁɪçˈmoːs]; 29 January 1773 – 29 September 1839) was a German chemist and mineralogist. He was the creator of the Mohs scale of mineral hardness. Mohs also introduced a classification of the crystal forms in crystal systems independently of Christian Samuel Weiss.
Early life and education
[edit]Mohs was born on 29 January 1773, in Gernrode, in the Harz mountains, Anhalt-Bernburg (present-day Saxony-Anhalt, Germany). He showed an interest in science at an early age and received private education before entering the University of Halle.[4] There, Mohs studied chemistry, mathematics and physics. In 1798, he joined the Mining Academy in Freiberg, Saxony, being a student of Abraham Gottlob Werner.
Career
[edit]After acquiring the job of a foreman at a mine in 1801, Mohs relocated in 1802 to Austria, where he was employed in trying to identify the minerals in a private collection of the banker J. F. van der Nüll. Mohs described this collection, and a catalogue was printed and published.[5] In 1812 he relocated to Graz where he was employed by Archduke Johann in his newly estab
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What is Mohs Scale of Hardness?
Mohs Scale Measures Scratch Resistance
Mohs scale of mineral hardness was created in 1812 by Viennese mineralogist Friedrich Mohs.
The purpose of the scale was to identify scratch hardness. This is the resistance of one mineral when being scratched by another.
Mohs scale was made up of ten common minerals all with a different hardness. The softest was talc the hardest was diamond.
The scale is still widely used today to grade the hardness of one mineral against another. It's also used for identification purposes. If you're unsure whether a mineral is quartz or topaz, topaz will scratch quartz but quartz won't scratch topaz.
On Mohs scale of hardness talc which grades 1 can be scratched by gypsum which grades 2. Gypsum can be scratched by calcite which grades 3.
The harder the mineral the higher its grade. With diamond being the hardest substance known to man it grades 10.
Every mineral on Mohs scale of hardness can scratch another with a lower grade. It can also be scratched by one with a higher grade. Minerals with the same grade can scratch each other. Half grades are also used.
All known minerals and most rocks now have a place on the scale.
Although Friedrich Mohs cre
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Image credit: Hazelnut Gibson
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But reason do miracle organise minerals in that way, spreadsheet who was Friedrich Mohs – picture person who invented depiction whole system?
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