| 词条 | Colemanite |
| 释义 |
| name = Colemanite | category = Inoborates | image = Colemanite - USGS Mineral Specimens 096.jpg | imagesize = 260px | caption = | formula = Ca2B6O11·5H2O | strunz = 6.CB.10 | system = Monoclinic | class = Prismatic (2/m) (same H-M symbol) | symmetry = P21/a | unit cell = a = 8.712(2) Å, b = 11.247(3) Å, c = 6.091(1) Å; β = 110.12°; Z = 4 | color = Colorless, white, yellowish, grey | habit = Massive granular to coarsely crystalline, most commonly nodular. | twinning = | cleavage = [010] perfect, [001] distinct | fracture = Brittle uneven to subconchoidal | mohs = 4.5 | luster = Vitreous | refractive = nα = 1.586 nβ = 1.592 nγ = 1.614 | opticalprop = Biaxial (+) | birefringence = δ = 0.028 | pleochroism = | streak = White | gravity = 2.42 | density = | melt = | fusibility = 1.5 | diagnostic = Exfoliates on heating, produces a green flame | solubility = | diaphaneity = Transparent to translucent | other = Bright pale yellow fluorescence, may phosphoresce pale green; pyroelectric and piezoelectric at very low temperature. | references = [1][2][3][4][5] }}Colemanite (Ca2B6O11·5H2O)[5] or (CaB3O4(OH)3·H2O)[3] is a borate mineral found in evaporite deposits of alkaline lacustrine environments. Colemanite is a secondary mineral that forms by alteration of borax and ulexite.[2] It was first described in 1884 for an occurrence near Furnace Creek in Death Valley and was named after William Tell Coleman (1824–1893), owner of the mine "Harmony Borax Works" where it was first found.[3] At the time, Coleman had alternatively proposed the name "smithite" instead after his business associate Francis Marion Smith.[6] UsesColemanite is an important ore of boron, and was the most important boron ore until the discovery of kernite in 1926. It has many industrial uses, like the manufacturing of heat resistant glass.[7] See also
References1. ^[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Colemanite Mineralienatlas] *{{cite journal2. ^1 Klein, Cornelis and Cornelius S. Hurlbut, Jr.; 1985, Manual of Mineralogy, Wiley, 20th ed., p. 347 {{ISBN|0-471-80580-7}} 3. ^1 2 Mindat 4. ^Webmineral 5. ^1 Handbook of Mineralogy 6. ^Hildebrand, GH. (1982) Borax Pioneer: Francis Marion Smith. San Diego: Howell-North Books. p 31 {{ISBN|0-8310-7148-6}} 7. ^{{cite book |chapter=Nitrates |date=1977 |title=Simon & Schuster's Guide to Rocks and Minerals |publisher=Simon & Schuster |isbn=978-0-671-24417-0 |page=entry 111 }} | title = Vibrational spectra and the ferroelectric phase transition of colemanite | author = R. F. Gallup1 and L. B. Coleman | journal = Physics and Chemistry of Minerals | volume = 17 | issue = 3 | pages = 271–274 | year = 1990 | url = | doi = 10.1007/BF00201460 |bibcode = 1990PCM....17..271G }}
| url = http://www.nps.gov/history/history/online_books/deva/section3e1.htm | title = Death Valley - Historic Resource Study - A History of Mining}} External links{{Commons category}}{{Cite EB1911|first=Leonard James |last=Spencer|wstitle=Colemanite|volume=6|page=665}}{{mineral-stub}} 4 : Inoborates|Ferroelectric materials|Monoclinic minerals|Luminescent minerals |
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