| 词条 | Xifengite |
| 释义 |
| name = Xifengite | image = | alt = | caption = | category = Native element minerals | formula = Fe5Si3 | strunz = 1.BB.40 | system = Hexagonal | class = Dihexagonal dipyramidal (6/mmm) H-M symbol: (6/m 2/m 2/m) | symmetry = P63/mcm | unit cell = a = 6.759(5) c = 4.720(5) [Å]; Z = 2 | molweight = | color = Gray, steel-black | colour = | habit = As inclusions | twinning = | cleavage = | fracture = | tenacity = | mohs = 5 | luster = Metallic | streak = Black | diaphaneity = Opaque | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | references = [1][2] }} Xifengite (Fe5Si3) is a rare metallic iron silicide mineral. The crystal system of xifengite is hexagonal. It has a specific gravity of 6.45 and a Mohs hardness of 5.5. It occurs as steel gray inclusions within other meteorite derived nickel iron mineral phases. It was first described in 1984 and named for the eastern passageway, Xifengkou, of the Great Wall of China. The type locality is the Yanshan meteorite of the Hebei Province, China. It has also been reported from dredgings along the East Pacific Rise. The other known natural iron silicide minerals are gupeiite (Fe3Si), hapkeite (Fe2Si), linzhiite (FeSi2), luobusaite (Fe0.84Si2), naquite (FeSi), suessite (Fe,Ni)3Si, and zangboite (TiFeSi2).[3] See also
References1. ^Xifengite data on Webmineral {{Meteorites}}{{mineral-stub}}2. ^Xifengite on Mindat,org with location data 3. ^Mindat, http://www.mindat.org 3 : Iron minerals|Meteorite minerals|Hexagonal minerals |
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