TY  - JOUR
A1  - Trömel, Martin
T1  - Metallradien, Ionenradien und Wertigkeiten fester metallischer Elemente
T1  - Metallic radii, ionic radii, and valences of solid metallic elements
T2  - Zeitschrift für Naturforschung
N2  - Metallic radii rm are correlated with the ionic radii ri by linear relationships. For groups 1 up to 7 as well as for Al, Ga, In, Tl, Sn, and Pb the ionic radii refer to the maximum valences (oxidation states) as known from compounds according to rm ~ 1.16 x (ri + 0.64) [A° ]. For groups 8 up to 12, rm ~ 0.48 x (ri + 2.26) [°A] with valences W = 14 - G (G = group number). These valences are considered regular (Wr). For groups 1 up to 12, they obey the equation Wr = 7 - |G - 7|. According to this equation all outer s electrons and the unpaired d electrons should be involved in chemical bonding, i.e. in the cohesion of the element in the solid state. From the melting temperatures and the atomic volumes it is concluded, however, that only 19 out of the 30 d-block elements have regular valences, namely the elements of groups 3, 5, 6, 10, 11 as well as Os, Ir, Zn, Cd, and possibly Ru. All of the non-regular valences are lower than the regular ones. Four of them are integers: Mn 3; Fe, Co 4; Re 6.
KW  - Metallic radii
KW  - Ionic radii
KW  - Metallic valence
KW  - Atomic volume
Y1  - 2005
UR  - http://publikationen.ub.uni-frankfurt.de/frontdoor/index/index/docId/3091
UR  - https://nbn-resolving.org/urn:nbn:de:hebis:30-22959
VL  - 55b
SP  - 243
EP  - 247
ER  -