Calcium sulfate an unusual property: when mixed with water at normal (ambient) temperatures, it quickly reverts chemically to the preferred dihydrate form, while physically "setting" to form a rigid and relatively strong gypsum crystal lattice: This reaction is exothermic and is responsible for the ease with which gypsum can be cast into various shapes including sheets (for drywall), sticks (for blackboard chalk), and molds (to immobilize broken bones, or for metal casting). Mixed with polymers, it has been used as a bone repair cement. Small amounts of calcined gypsum are added to earth to create strong structures directly from cast earth, an
That's What Little Girls Are Made Of That's What Little Girls Are Made Of "That's What Little Girls Are Made Of" is the debut mainstream single from Raven-Symoné featuring rapper Missy Elliott (credited as her full name "Melissa Elliott"), taken from her debut studio album, "Here's to New Dreams". This is Symoné's highest chart appearance to date. The song was written and produced by Missy Elliott, who performs a verse of scat singing and Jamaican-style toasting, but the music video featured a thinner light-skinned actress lip-syncing her part. On "Behind the Music" Elliott reveals that she was not informed of the video shoot and later told she