In the right-hand segment, the same policy is followed, the four triads
becoming two sextets, while the central body adds a third to the number.
The second ring has a quartet instead of the sextet, but otherwise breaks
up as does that of the left; the quintet at the base follows that of boron.
INDIUM (Plate XIII, 3).
The complication of three segments of different types in each funnel does
not affect the process of breaking up, and indium needs little attention. A
is exactly the same as the left-hand funnel of gallium, save for the
substitution of a globe containing the familiar "cigar" and two
square-based pyramids. B is the same as the right-hand funnel of gallium,
except that its lowest body consists of two square-based pyramids and a
tetrahedron. All these are familiar.
PHOSPHORUS (Plate XIV, 1).
[Illustration]
The atoms in the six similar spheres in the segments of the phosphorus
funnel are arranged on the eight angles of a cube, and the central one is
attached to all of them. On the meta level five of the nine atoms hold
together and place themselves on the angles of a square-based pyramid; the
remaining four set themselves on the angle of a tetrahedron.
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