Plagioklaasiens
Plagioklaasiens, or plagioclase feldspars, are a group of tectosilicate minerals within the feldspar group. They are among the most common rock-forming minerals and are characterized by their continuous solid solution series, meaning they can vary in composition between albite (sodium-rich) and anorthite (calcium-rich). This compositional range allows plagioclase feldspars to exhibit a variety of physical properties, including color, hardness, and cleavage.
Plagioclase feldspars typically form in igneous, metamorphic, and sedimentary rocks. In igneous environments, they are a
The mineralogy of plagioclase feldspars is defined by their chemical formula, (Na,Ca)Al(Al,Si)Si2O8, where the sodium and
Plagioclase feldspars are generally white, gray, or colorless but can exhibit a range of hues due to