De or het kristalkunde?

The correct Dutch article is:

de kristalkunde

How to use kristalkunde

the kristalkundede kristalkunde
this kristalkundedeze kristalkunde
that kristalkundedie kristalkunde
our kristalkundeonze kristalkunde
your kristalkundejouw kristalkunde
every kristalkundeelke kristalkunde
which kristalkunde?welke kristalkunde?
a big kristalkunde / the big kristalkundeeen grote kristalkunde, de grote kristalkunde