This article is about the mineral, for the religious sect see Adamites. Adamites being persecuted Adamites, or Adamians, were adherents of an early Christian heresy that flourished in North Africa in the 2nd, 3rd and 4th century. ...

Adamite
Yellow-green adamite in limonite. Image File history File links Download high resolution version (902x502, 82 KB) File links The following pages link to this file: Adamite User:Aramgutang/Gallery Categories: User-created public domain images ... Limonite Limonite Limonite is a ferric hydrate of varying composition, the generic formula is frequently written as FeO(OH)·nH2O, although this is not entirely accurate as Limonite often contains a varying amount of oxide compared to hydroxide. ...
General
Category	Mineral
Chemical formula	Zn2AsO4OH
Identification
Color	Yellow, green, rarely white, and occasionally purple
Crystal habit	Wedge-like prisms typically in druses and radiating clusters - also smooth botryoidal masses.
Crystal system	Orthorhombic; 2/m 2/m 2/m
Cleavage	perfect in two directions
Fracture	conchoidal.
Mohs Scale hardness	3.5
Luster	adamantine
Refractive index	nα=1.708 - 1.722 nβ=1.742 - 1.744 nγ=1.763 - 1.773
Pleochroism	.
Streak	white to pale green
Specific gravity	4.4
Other Characteristics	Strongly fluoresces green in short and long UV light.

Adamite is a zinc arsenate hydroxide mineral, Zn₂AsO₄OH. It is a mineral that typically occurs in the oxidized or weathered zone above zinc ore occurrences. Adamite is usually yellow in color, but tints of green occur due to inclusion of copper substitutions in the mineral structure. Olivinite is a copper arsenate that is isostructural with adamite and there is considerable substitution between zinc and copper resulting in an intermediate called cuproadamite. Manganese, cobalt, and nickel also substitute in the structure. An analogous zinc phosphate, tarbuttite, is known. Minerals are natural compounds formed through geological processes. ... A chemical formula (also called molecular formula) is a concise way of expressing information about the atoms that constitute a particular chemical compound. ... In mineralogy, shape and size give rise to descriptive terms applied to the typical appearance, or habit of crystals. ... Rose des Sables (Sand Rose), a formation of gypse crystal In mineralogy and crystallography, a crystal structure is a unique arrangement of atoms in a crystal. ... In crystallography, the orthorhombic crystal system is one of the 7 lattice point groups. ... Cleaveage, in mineralogy, is the tendency of crystalline materials to split along definite planes, creating smooth surfaces, of which there are several named types: Basal cleavage: cleavage parallel to the base of a crystal, or to the plane of the lateral axes. ... A fracture is the separation of a body into two, or more, pieces under the action of stress. ... Mohs scale of mineral hardness characterizes the scratch resistance of various minerals through the ability of a harder material to scratch a softer. ... The refractive index of a material is the factor by which electromagnetic radiation is slowed down (relative to vacuum) when it travels inside the material. ... Pleochroism is an optical phenomenon where due to double refraction of light by a colored gem or crystal, the light is divided into two paths which are polarized at a 90° angle to each other. ... In any mineral, its streak refers to the color of its powder. ... Relative density (also known as specific gravity) is a measure of the density of a material. ... General Name, Symbol, Number zinc, Zn, 30 Chemical series transition metals Group, Period, Block 12, 4, d Appearance bluish pale gray Atomic mass 65. ... Hydroxide is a polyatomic ion consisting of oxygen and hydrogen: −O−H It has a charge of −1. ... Minerals are natural compounds formed through geological processes. ... The most fundamental reactions in chemistry are the redox processes. ... Weathering is the process of decomposition and/or disintegration of rocks in situ, that is, in place. ... General Name, Symbol, Number copper, Cu, 29 Chemical series transition metals Group, Period, Block 11, 4, d Appearance copper, metallic Atomic mass 63. ... General Name, Symbol, Number manganese, Mn, 25 Chemical series transition metals Group, Period, Block 7, 4, d Appearance silvery metallic Atomic mass 54. ... General Name, Symbol, Number cobalt, Co, 27 Chemical series transition metals Group, Period, Block 9 , 4, d Density, Hardness 8. ... General Name, Symbol, Number nickel, Ni, 28 Chemical series transition metals Group, Period, Block 10 , 4, d Density, Hardness 8908 kg/m³, 4. ...

The yellow to bright lime-green colored crystals and druze along with its distinctive fluorescence make adamite a favorite among mineral collectors. Found in Mapimi, Mexico; Greece; and California and Utah in the United States. State nickname: The Golden State Other U.S. States Capital Sacramento Largest city Los Angeles Governor Arnold Schwarzenegger (R) Official languages English Area 410,000 km² (3rd)  - Land 404,298 km²  - Water 20,047 km² (4. ... State nickname: Beehive State Other U.S. States Capital Salt Lake City Largest city Salt Lake City Governor Jon M. Huntsman, Jr. ...

Adamite was named after the French mineralogist Gilbert Joseph Adam (1795-1881). The type locality is in the Atacama Desert in Chile. Mineralogy is an earth science that involves the chemistry, crystal structure, and physical (including optical) properties of minerals. ... Atacama The Atacama desert of Chile is a virtually rainless plateau made up of salt basins (salares), sand, and lava flows, extending from the Andes mountains to the Pacific Ocean. ...

References

• Mindat.org
• Webmineral.com
• Mineral galleries