SODIUM NITRATE NaNO,
Sodium Nitrate is somewhat similar to HNO, and KNO,. Each has the NO, group. In Sodium Nitrate we have the Sodium dumb-bell instead of the Potassium spike. Sodium consists of a central rod, Nal4, and two spheres, NalO, from each of which radiates a flower of 12 funnels, making 24 in all.
The Nitrogen atom acts as in the other nitrates, forming a central group with the N110 and N63 round it and the four sentinels, two N20 and two N24, at the corners. The three Oxygen atoms are also placed in Sodium Nitrate as they are in HNO, or KNO,. that is, at the corners of a triangle, probably upright at right angles to the paper with the N110 group in the centre. Fig. 187.
It remains to account for the Sodium atom. It is broken up. The funnels are no longer in the usual groups (flowers) but are in rows like a brush coming down between the Oxygen atoms. There are eight funnels in a line coming out from the centre and sticking out. The NalO are inside in the space from which the funnels start. The larger ovoid, the Nal4, is shown below the N110 group. It will be seen that three groups of eight make up the 24 funnels. Four come from one set of 12 and four from another to make the third set. These are shown at the corners of a triangle between the Oxygen atoms and are drawn as pointing to the centre but making a brush. All revolve in the same direction.
potassium nitrate kn03.
FIG 188. POTASSIUM NITRATE KNOs
POTASSIUM NITRATE KNO,
Here we have a Potassium atom instead of Sodium. The Potassium consists of 9Li63 spikes, 6Li4 globes and one N110.
The Potassium atom as well as the Nitrogen is split up. The Oxygen is very active and appears to act as the agent causing this splitting up. Fig. 188.
If we could put a tetrahedron over the head of this molecule, that would partly represent the way the components are arranged, but the two tetrahedrons are not placed one on top of the other but lie between one another. It is difficult to explain the perspective.
First there are two N110 groups revolving round a common centre. Then come the six Li4 at the points of a hexagon and taking the place of the Hydrogen units in HNO,. Round these again come the seven N9 from the N63. The four globes, two N20 and two N24, appear at the corners as before.
The nine spikes from the Potassium, 9Li63, come between the Oxygen atoms and are indicated as arranged in groups of three. The diagram gives a suggested position for them as the original is not clear. These may perhaps be also at the points of a triangle in a plane perpendicular to the paper, making a three-dimensional figure. The Oxygen atoms are placed at the points of a triangle as in HNOt.
potassium chlorate kclo
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