Selenite Gypsum crystal

Selenite Gypsum crystal

Selenite (chemical formula: CaSO₄·2H₂O) is a hydrous calcium sulfate, meaning it is composed of oxygen, sulfur, hydrogen, calcium and water. It is basically a glassy, well-crystallized form of gypsum and is often referred to as satin spar. Selenite, a Gypsum crystal Source: US Government File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Selenite, a Gypsum crystal Source: US Government File history Legend: (cur) = this is the current file, (del) = delete this old version, (rev) = revert to this old version. ... Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. // Chemical structure Heating gypsum to between 100°C and 150°C (302°F) partially dehydrates the mineral by driving off exactly 75% of the water contained in its chemical structure. ... Image File history File linksMetadata Selenite_tds. ... Image File history File linksMetadata Selenite_tds. ... Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. // Chemical structure Heating gypsum to between 100°C and 150°C (302°F) partially dehydrates the mineral by driving off exactly 75% of the water contained in its chemical structure. ... Calcium sulfate is a common laboratory and industrial chemical. ... General Name, Symbol, Number oxygen, O, 8 Chemical series Nonmetals, chalcogens Group, Period, Block 16, 2, p Appearance colorless Atomic mass 15. ... General Name, Symbol, Number sulfur, S, 16 Chemical series nonmetals Group, Period, Block 16, 3, p Appearance lemon yellow Atomic mass 32. ... General Name, Symbol, Number hydrogen, H, 1 Chemical series nonmetals Group, Period, Block 1, 1, s Appearance colorless Atomic mass 1. ... General Name, Symbol, Number calcium, Ca, 20 Chemical series alkaline earth metals Group, Period, Block 2, 4, s Appearance silvery white Atomic mass 40. ... Water (from the Old English waeter; c. ... Gypsum is a very soft mineral composed of calcium sulfate dihydrate, with the chemical formula CaSO4·2H2O. // Chemical structure Heating gypsum to between 100°C and 150°C (302°F) partially dehydrates the mineral by driving off exactly 75% of the water contained in its chemical structure. ...

Selenite is soft, and can easily be scratched with a fingernail. The thin crystals can be slightly flexible, but will snap if bent too far. Some crystals found in Kentucky have grown in severely curved patterns and flower-like petals. It has been suggested that crystallization processes be merged into this article or section. ... Official language(s) English Capital Frankfort Largest city Louisville Area  Ranked 37th  - Total 40,444 sq mi (104,749 km²)  - Width 140 miles (225 km)  - Length 379 miles (610 km)  - % water 1. ...

In some very rare instances, water becomes encased in a cavity as the crystal forms. In these samples, the tiny bubble of water can be seen moving as you rotate the stone.

In dry desert conditions, sand may become trapped inside the crystals as they form. Sandy selenite formations can take on the shape of an hourglass or the more familiar "desert rose" shape. These selenite crystals are totally opaque and have been found in large quantities in Oklahoma, Texas and the Sahara Desert. Desert view in Saudi Arabia. ... Official language(s) None Capital Oklahoma City Largest city Oklahoma City Area  Ranked 20th  - Total 69,960 sq. ... Official language(s) See: Languages of Texas Capital Austin Largest city Houston Area  Ranked 2nd  - Total 268,581 sq. ... The Sahara is the worlds second largest desert (second to Antarctica), over 9,000,000 km² (3,500,000 mi²), located in northern Africa and is 2. ...

Selenite crystals are often found in the Gault Clay and London Clay formations of England as well as the Great Salt Plains Lake in Oklahoma. The Gault Clay is a formation of stiff blue clay deposited in a calm, fairly deep water marine environment during the Lower Cretaceous Period (Upper and Middle Albian). ... The London Clay is a marine deposit which is well known for the fossils it contains. ... Royal motto (French): Dieu et mon droit (Translated: God and my right) Englands location (dark green) within the United Kingdom (light green), with the Republic of Ireland (blue) to its west Languages English Capital London Largest city London Area – Total Ranked 1st UK 130,395 km² Population –mid-2004... Image:Great Salt Plains Lake, Oklahoma. ... Official language(s) None Capital Oklahoma City Largest city Oklahoma City Area  Ranked 20th  - Total 69,960 sq. ...

Also, Selenites are the aliens that live underground in the Moon in H.G. Wells' Novel The First Men In The Moon H. G. Wells at the door of his house at Sandgate Herbert George Wells (September 21, 1866 - August 13, 1946) was an English writer best known for his science fiction novels such as The War of the Worlds and The Time Machine. ... The First Men in The Moon is a 1901 science fiction novel by the British author H. G. Wells. ...