| 词条 | Wavellite |
| 释义 |
| name = Wavellite | category = Phosphate minerals | boxwidth = | boxbgcolor = | image = Wavellite-162460.jpg | imagesize = 260px | caption = Wavellite cluster from din Mountain Quarries, Mauldin Mt., Montgomery County, Arkansas, USA | formula = Al3(PO4)2(OH,F)3·5H2O | strunz = 8.DC.50 | system = Orthorhombic | class = Dipyramidal (mmm) H-M symbol: (2/m 2/m 2/m) | symmetry = Pcmn | unit cell = a = 9.621 Å b = 17.363 Å, c = 6.994 Å; Z = 4 | color = Green to yellowish-green and yellow, brown, white and colorless | habit = Spherical, radial aggregates; striated prisms; crusty to stalactitic | twinning = | cleavage = [110] perfect, [101] good, [010] distinct | fracture = Uneven to subconchoidal | mohs = 3.5 - 4 | luster = Vitreous to resinous, pearly | refractive = nα = 1.518 - 1.535 nβ = 1.524 - 1.543 nγ = 1.544 - 1.561 | opticalprop = Biaxial (+) | birefringence = δ = 0.026 | pleochroism = Weak; X = greenish; Z = yellowish | 2V = Measured: 60° to 72° | streak = White | gravity = 2.36 | fusibility = Infusable, swells and splits on heating | diagnostic = | solubility = Insoluble | diaphaneity = Translucent | other = | references = [1][2][3][4] }} Wavellite is a phosphate mineral with formula Al3(PO4)2(OH, F)3·5H2O. It normally occurs as translucent green radial or spherical clusters. Discovery and occurrenceIt was first described in 1805 for an occurrence at High Down, Filleigh, Devon, England and named for William Wavell of England who brought the mineral to the attention of the Scientific community.[3] It occurs in association with crandallite and variscite in fractures in aluminous metamorphic rock, in hydrothermal regions and in phosphate rock deposits.[1] It is found in a wide variety of locations notably in the Mount Ida, Arkansas area in the Ouachita Mountains. It is sometimes used as a gemstone.[5] {{clearleft}}See also
References1. ^1 Handbook of Mineralogy {{clearboth}}2. ^Webmineral 3. ^1 Mindat 4. ^Klein, Corneis and Cornelius S. Hurlbut, Jr., Manual of Mineralogy, Wiley, 20th ed. 1985, p. 362-3 {{ISBN|0-471-80580-7}} 5. ^Gemstones: Properties, Identification and Use By Arthur Thomas, p.132 External links{{commonscat|Wavellite}}{{Phosphate minerals}}{{Authority control}}{{Phosphate-mineral-stub}} 5 : Aluminium minerals|Phosphate minerals|Orthorhombic minerals|Luminescent minerals|Gemstones |
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