Yes, ALNICOS is a Scrabble word!

Letter values in Scrabble US: A 1, L 1, N 1, I 1, C 3, O 1, S 1.

Is it a valid word?

ALNICOS is a valid word in the official Scrabble dictionary (US) and the UK Scrabble Dictionary, but not in Words with Friends (ENABLE).

trade name for an alloy used to make high-energy permanent magnets; contains aluminum and iron and nickel plus cobalt or copper or titanium