FIGURE 118.-Drawings to illustrate growth and twinning habits of sucrose crystals.

FIGURE 118.-(Continued).

(b) Crystals grown from a sucrcse solution containing raffinose.

(b) a-DEXTROSE HYDRATE

Class: 4, Monoclinic sphenoidal.

Ratio of axes: a:b:c=1.735:1:1.908.

B=97°59′ (Becke) [15]

Solubility: One end disolves much more quickly than the other. Plane of optic axes: b (010)

Median line: Approximately perpendicular to (101).

Arial angle: Large.

Refractive indices: n,, a=1.517, B=1.530, y=1.555.

TABLE 68.-Angular values between faces of dextrose monohydrate crystals

The rhombic or orthorhombic system is characterized by three rectangular axes, a, b, and c, all of

unequal length.

FIGURE 122.-Levulose crystal showing different development of faces.