Very soft, at 3 to 3.5. See http://www.mindat.org/min-234.html for more info.
The Mohs hardness of sodium chloride is 2,5.
the mineral that has a hardness of 7 is "Quarts
when ductility increase hardness decrease
Yes, hardness is a specific property of each material.
Minerologists identify mineral harness with a variety of tools. In order of hardness, they gnerally use their fingernails, nails, copper pennies, knife blades, glass, porcelain and other minerals such as quartz, topaz, corundum and diamond. The Moh's Hardness Scale gives a list of minerals in order of hardness with talc being the softest with a rating of "1" and diamond the hardest at a "10".
anhydrite is a sedimentary rock ...........
The chemical formula of Anhydrite is Calcium Sulfate. Sometimes the shell of anhydrite can be composed of strontium, depending where you find it.
Anhydrite is formed from dehydrated gypsum or to make it easier to understand when water is added to anhydrite it becomes gypsum as we can see from their chemical formulas [Anhydrite (CaSO4) and Gypsum (CaSO4-2H2O)].
it anhydrites.
no found because evaporit into anhydrite
CaSO4 calcium, Sulfur, and four Oxygen
Charles F. Withington has written: 'Selected annotated bibliography of gypsum and anhydrite in the United States and Puerto Rico' -- subject(s): Gypsum, Bibliography, Anhydrite
Ca with a 2+ charge and SO4 with a 2- charge.
Sulfates such as anhydrite (CaSO4) are cmposed of elements with the sulfate compound SO4.
Nope, Limestone reacts on contact, dolomite if scratched to increase its surface area or heating the acid. Anhydrite does not under most circumstances. This fact is used to tell the difference on carbonate wells, among other things
a form of CaSO4 that is rapidly soluble in water , as it goes to CaSO4 2 H2O.
High-sulfur anhydrite-bearing magma and pyroclastic flows.