フォルステライト 化学特性,用途語,生産方法
解説
フォルステライト，斜方晶系に属し，淡黄色～淡緑色，合成結晶は無色透明，b軸方向に伸びた柱状または粒状，よい結晶面を示すことはまれである。モース硬度7，比重3.222，カンラン岩の主成分鉱物であるが，未変成の石質隕石やドロマイト質接触変成岩中にも出現する。
説明
Forsterite (Mg2SiO4) is the magnesium-rich endmemberof
the Olivine solidsolutionseries. Forsterite crystallizes
in the orthorhombic system(space group = Pbnm)
with cell parameters a = 4.75 ?(0.475 nm), b = 10.20 ?
(1.020 nm) and c = 5.98 ? (0.598 nm).
Forsterite is associated with igneous and metamorphic
rocks and has also been found in meteorites.
Forsterite is associated with igneous and metamorphic
rocks and has also been found in meteorites.
In 2005, it was also found in cometary dust returned
by the “Stardust” probe in space.
物理的性質
Habit: prismatic, tabular.
Color: white, yellow, or greenish yellow.
Diaphaneity: transparent to translucent.
Luster: vitreous (i.e., glassy).
Streak: white.
Cleavage: (010) good, (001) poor.
Fracture: conchoidal.
Chemical: attacked by concentrated HCl with formation of a gel of silica.
Melting point: 1898°C.
フォルステライト 上流と下流の製品情報
原材料
準備製品