alloclasite

In mineral terms the difference between arsenopyrite and alloclasite

is that arsenopyrite is a silvery-grey ore of arsenic, a mixed arsenide and sulfide of iron, FeAsS while alloclasite is a brittle monoclinic sulfosalt mineral of the arsenopyrite group.

As nouns the difference between mineral and alloclasite

is that mineral is mineral while alloclasite is (mineral) a brittle monoclinic sulfosalt mineral of the arsenopyrite group.

As nouns the difference between sulfosalt and alloclasite

is that sulfosalt is (mineralogy) a complex sulfide mineral with certain proportions of a metal, a semi-metal, and sulfur (or, rarely, selenium) while alloclasite is (mineral) a brittle monoclinic sulfosalt mineral of the arsenopyrite group.

As an adjective monoclinic

is (crystallography) having three unequal axes with two perpendicular and one oblique intersections.

As a noun alloclasite is

(mineral) a brittle monoclinic sulfosalt mineral of the arsenopyrite group.

As nouns the difference between brittle and alloclasite

is that brittle is (uncountable) a confection of caramelized sugar and nuts while alloclasite is (mineral) a brittle monoclinic sulfosalt mineral of the arsenopyrite group.

As an adjective brittle

is inflexible, liable to break or snap easily under stress or pressure.