Gmelin system
The Gmelin system is a system that unambiguously classifies inorganic compounds in the Gmelins manual of inorganic chemistry and thus makes them traceable. → Leopold Gmelin
It arranges the elements according to an order that differs from the periodic table . The connection is then handled in the section whose element has the highest system number.
For example, hydrogen is number 2, oxygen is number 3. So H 2 O is treated in system number 3. Sodium has the number 21, chlorine the number 6, so NaCl is treated under the system number 21 under sodium. K 2 SO 4 is treated under potassium because potassium has the number 22, oxygen the 3 and sulfur the 9.
In general, the anion formers have a lower number than cation formers.
In a volume with the number N, all connections of the system numbers 1 to N-1 are dealt with. It is therefore also called the system of the last digit.
List of volumes by Gmelin system numbers
- 1 noble gases
- 2 hydrogen
- 3 oxygen
- 4 nitrogen
- 5 fluorine
- 6 chlorine
- 7 bromine
- 8 iodine
- 8a astatine
- 9 sulfur
- 10 selenium
- 11 tellurium
- 12 polonium
- 13 boron
- 14 carbon
- 15 silicon
- 16 phosphorus
- 17 arsenic
- 18 antimony
- 19 bismuth
- 20 lithium
- 21 sodium
- 22 potassium
- 23 ammonium ion
- 24 rubidium
- 25 Cesium
- 25a Francium
- 26 beryllium
- 27 magnesium
- 28 calcium
- 29 strontium
- 30 barium
- 31 radium
- 32 zinc
- 33 cadmium
- 34 mercury
- 35 aluminum
- 36 gallium
- 37 indium
- 38 thallium
- 39 Rare earths
- 40 actinium
- 41 titanium
- 42 zirconium
- 43 hafnium
- 44 thorium
- 45 germanium
- 46 tin
- 47 lead
- 48 vanadium
- 49 niobium
- 50 tantalum
- 51 Protactinium
- 52 chrome
- 53 molybdenum
- 54 tungsten
- 55 uranium
- 56 manganese
- 57 nickel
- 58 cobalt
- 59 iron
- 60 copper
- 61 silver
- 62 gold
- 63 ruthenium
- 64 rhodium
- 65 palladium
- 66 osmium
- 67 iridium
- 68 platinum
- 69 Technetium (until 1941 Masurium)
- 70 rhenium
- 71 transuranic elements ( Neptunium , Plutonium , Americium , Curium , Berkelium , Californium , Einsteinium , Fermium , Mendelevium , Nobelium , Lawrencium )
Individual evidence
- ^ Brockhaus ABC Chemie , VEB FA Brockhaus Verlag Leipzig 1965, pp. 497-498.