The copper(II) ion reacts with phosphate ion to form an insoluble ionic compound, Ksp = 1.40×10–37. The copper(II) ion also forms a complex ion with ammonia, [Cu(NH3)4]2+, Kf = 5.03×1013. what is K?

answer is: naturally occurring solid, inorganic compound or element is mineral.

minerals usually have crystalline form, that means than crystal constituents (atoms, molecules or ions) are arranged in a highly ordered microscopic structure, forming a crystal lattice that extends in all directions.

for example magnetite is a mineral of iron oxide (fe₂o₃).

calcite is a carbonate mineral and the most stable polymorph of calcium carbonate (caco₃).

dolomite is an   carbonate mineral composed of calcium magnesium carbonate (camg(co₃)₂).