Glaucophane Mineral Data
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. Granular - Generally occurs as anhedral to subhedral crystals in matrix. Massive - Fibrous - Distinctly …
Glaucophane - Clark Science Center
To the left is a photomicrograph of glaucophane, the lavender colored mineral. When the stage is rotated 90 degress, glaucophane's color changes from lavender to a clear, whitish purple. …
The crystal structure and cation distribution of glaucophane
Three-dimensional, scintillation-counter measured, X-ray diffraction data have been used in least-squares refinement of the atomic parameters and cation-sile occupancy factors for the crystal …
U. S. GeologicalSurvey, oral communication, 1967). The C2fm structure of glaucophane follows the general descrip-tion of the tremolite structure. The amphibole A site is located at a special …
Glaucophane Mineral | Properties, Occurrence & more.. - Geology …
2019年3月15日 · Crystals are slender, often lathlike prisms, with lengthwise striations. Twinning is common. Glaucophane can also be massive, fibrous, or granular. When iron replaces the …
Multi-scale characterization of glaucophane from Chiavolino …
Glaucophane is associated with basaltic and gabbroic protoliths, in which it crystallizes as a result of subduction. Glaucophane crystallizes in the monoclinic system and is classified in the …
Glaucophane - ALEX STREKEISEN
Glaucophane is a metamorphic mineral, obviously characteristic of, but non strictly restricted to the glaucophane schist facies (blueschist facies), wich, in turn, implies low temperature, high …
Glaucophane Na2[(Mg;Fe2+)3Al2]Si8O22(OH)2 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: 2=m: As prismatic crystals; columnar, ¯brous, or …
The low velocity layer in subduction zone: Structure and elasticity …
2012年10月1日 · The glaucophane crystal structure has a monoclinic C2/m space group (Comodi et al., 1991) and consists of three distinct octahedral sites, M1, M2, M3 that are sandwiched …
Glaucophane | Metamorphic Rock, Blue Schist & Amphibole
glaucophane, common amphibole mineral, a sodium, magnesium, and aluminum silicate that occurs only in crystalline schists formed from sodium-rich rocks by low-grade metamorphism …
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