This would make four interperiodic groups, and they would come
also _periodically_ in the table too.
I took the diagram for Osmium, and in a bar postulated only three columns
for the first element of the new groups, _i.e._, one column less than in
Osmium. This would make 183 atoms in a bar; the new group then would follow
in a bar, 183, 185, 187. Here I found to my surprise that the third
postulated group would have a remarkable relation to Os, Ir, Pt.
Thus
Os.--245 (in a bar); less 60 = 185
Ir. 247 less 60 = 187
Pt. 249 less 60 = 189
But strange to say _also_
Ruthenium (bar) 132 less 60--72
Rhodium 134 less 60--74
Palladium 136 less 60--76
But 72, 74, 76, are Iron, Cobalt and Nickel.
So there does probably exist a new group with bars (183), 185, 187, 189,
with atomic weights.
X=bar 185; atoms 2590, wt. 143.3
Y= 187, 2618, wt. 145.4
Z= 189, 2646, wt. 147.0.
They come probably among the rare earths. Probably also Neodymium and
Praseodymium are two of them, for their weights are 143.
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