Engineering Geology Set 2

Iron ✘ Iron and manganese ✘ Magnesium ✘ Iron and magnesium ✔

K Al O8 ✘ Ca Al Si3O8 ✘ K Al Si3 O8 ✘ Ca Al O8 ✔

Colour ✘ Streak ✘ Chemical composition ✘ Hardness ✔

It is composed of K mainly ✘ It is composed of either Na, Ca, or Al ✘ It is of massive or crystalline structure ✘ It gives 2 sets of cleavages ✔

1 ✘

Box structure ✘ Sheet structure ✘ Hexagonal structure ✘ Columnar structure ✔

1 ✘

0% ✘ More than 60% ✘ 0% ✘ 0% ✔

Triclinic and monoclinic ✘ Monoclinic and triclinic ✘ Monoclinic and rhombohedral ✘ Rhombohedral and triclinic ✔

Perfect cubic cleavage ✘ Perfect octahedral cleavage ✘ Perfect basal cleavage ✘ Prismatic cleavage ✔