Solid fuel Moon rockets (was Economics)

In a message dated 4/11/01 8:53:47 PM Eastern Daylight Time,
ian.woollard@... writes:

<< That ones a bit better, you can condense and electrolyse the
water. Of course condensers in a vacuum aren't particularly
efficient... And you need a LOT of electricity. Generating
electricity on the moon isn't particularly easy, because there's
no obvious heat dump; or solar panels, but these are going to
be massive aren't they?

> (iv) 4FeTiO3 + CH4 -> 2H2O + CO2 + 4Fe + 4TiO2
>>

4FeTiO3 + Concentrated Sunlight -> 4Fe+ , Ti+, 3O+

Why not build parabolic mirrors and heat the compounds until they
disassociate into their constituent elements?