[ILoveISO]

http://webassign.net/zumchemp6/16-e-100.gif
How many triple points are there? 2?

Monoclinic is a liquid right... why is there a separate section for it

[cliverlong]

http://webassign.net/zumchemp6/16-e-100.gif
How many triple points are there? 2?

http://en.wikipedia.org/wiki/Triple_point

I count three in your diagram.

From the wikipedia entry above:

In thermodynamics, the triple point of a substance is the temperature and pressure at which three phases (for example, gas, liquid, and solid) of that substance coexist in thermodynamic equilibrium.[1]  ...

In addition to the triple point between solid, liquid, and gas, there can be triple points involving more than one solid phase, for substances with multiple polymorphs.

Monoclinic is a liquid right... why is there a separate section for it

A solid
http://www.tutorvista.com/topic/difference-between-rhombic-and-monoclinic-sulphur