| 词条 | Tapiolite |
| 释义 |
| name = Tapiolite | boxwidth = | boxbgcolor = | image = Tapiolite-121701.jpg | imagesize = | alt = | caption = | category = | formula = (Fe, Mn)(Nb, Ta)2O6 | molweight = | strunz = | dana = | system = Tetragonal | class = Ditetragonal dipyramidal (4/mmm) H-M symbol: (4/m 2/m 2/m) | symmetry = P42/mnm | unit cell = | color = | colour = | habit = | twinning = | cleavage = | fracture = | tenacity = | mohs = | luster = | streak = | diaphaneity = | gravity = | density = | polish = | opticalprop = | refractive = | birefringence = | pleochroism = | 2V = | dispersion = | extinction = | length fast/slow = | fluorescence = | absorption = | melt = | fusibility = | diagnostic = | solubility = | impurities = | alteration = | other = | prop1 = | prop1text = | references = [1] }}Tapiolite [(Fe, Mn)(Nb, Ta)2O6] is a black mineral series that is an ore of niobium and tantalum. The tapiolite group includes tapiolite-(Fe) or ferrotapiolite and tapiolite-(Mn) or manganotapiolite.[2][3][4] Tapiolite-(Fe) is by far the more common of the two.[5][6] The minerals have a submetallic luster and a high specific gravity with tapiolite-Fe having a higher specific gravity (7.90)[5] versus 7.72 for tapiolite-Mn.[6] The mineral was named in 1863 after the forest god Tapio of Finnish mythology, and the original tapiolite material came from Sukula, Tammela, Tavastia Proper, Finland.[2][7] Tapiolite is very close to columbite and tantalite. Those minerals have the same chemical composition, but different crystal symmetry orthorhombic for tantalite or columbite and tetragonal for tapiolite.[8] {{Gallery|lines=4 |align=right |File:Tapiolite.GIF|Crystal structure of tapiolite. }} References1. ^[https://www.mineralienatlas.de/lexikon/index.php/MineralData?mineral=Tapiolite Mineralienatlas] {{oxide-mineral-stub}}{{Manganese minerals}}2. ^1 Mindat tapiolite group 3. ^Ferrotapiolite in the Handbook of Mineralogy 4. ^Manganotapiolite in the Handbook of Mineralogy 5. ^1 Tapiolite-Fe on Mindat 6. ^1 Tapiolite-Mn on Mindat 7. ^webmineral Tapiolite 8. ^P. Cerny et al. "The tantalite-tapiolite gap: natural assemblages versus experimental data" Canadian Mineralogist 30 (1992) 587 free download 6 : Tantalum minerals|Niobium minerals|Iron minerals|Manganese minerals|Oxide minerals|Tetragonal minerals |
| 随便看 |
|
开放百科全书收录14589846条英语、德语、日语等多语种百科知识，基本涵盖了大多数领域的百科知识，是一部内容自由、开放的电子版国际百科全书。