りゅう砒鉄鉱 てっこうではありません
ryūtekkōdewārimasen

Noun
Desu Copula
Negation Auxiliary

The polite negative form of 硫砒鉄鉱

1. It is not thiopirite.; It is not thioarsenopyrite.

Negative
Polite
Formal Register
Geology