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The borate minerals are minerals which contain a borate anion group. The borate (BO3) units may be polymerised similar to the SiO4 unit of the silicate mineral class. This results in B2O5, B3O6, B2O4 anions as well as more complex structures which include hydroxide or halogen anions.〔Klein, Cornelis and Cornelius Hurlbut, Jr., ''Manual of Mineralogy'', Wiley, 20th ed., 1985 pp. 343 - 347 ISBN 0-471-80580-7〕 The ()− anion exists too. Many borate minerals, such as borax, colemanite, and ulexite, are salts: soft, readily soluble, and found in evaporite contexts. However, some, such as boracite, are hard and resistant to weathering, more similar to the silicates. There are over 100 different borate minerals.〔〔(Webmineral.Com ), Strunz group V/G - V/L〕 Borate minerals include: *Kernite Na2B4O6(OH)3·3(H2O) *Borax Na2B4O5(OH)4·8(H2O) *Ulexite NaCaB5O6(OH)6·5(H2O) *Colemanite CaB3O4(OH)3·(H2O) *Boracite Mg3B7O13Cl == Nickel–Strunz Classification -06- Borates == IMA-CNMNC proposes a new hierarchical scheme (Mills et al., 2009). This list uses it to modify the Classification of Nickel–Strunz (mindat.org, 10 ed, pending publication). *Abbreviations: * *" *" - discredited (IMA/CNMNC status). * *"?" - questionable/doubtful (IMA/CNMNC status). * *"REE" - Rare-earth element (Sc, Y, La, Ce, Pr, Nd, Pm, Sm, Eu, Gd, Tb, Dy, Ho, Er, Tm, Yb, Lu) * *"PGE" - Platinum-group element (Ru, Rh, Pd, Os, Ir, Pt) * *03.C Aluminofluorides, 06 Borates, 08 Vanadates (04.H V() Vanadates), 09 Silicates: * * *Neso: insular (from Greek νησος nēsos, island) * * *Soro: grouping (from Greek σωροῦ sōros, heap, mound (especially of corn)) * * *Cyclo: ring * * *Ino: chain (from Greek ις (ινος ''inos'' ), fibre) * * *Phyllo: sheet (from Greek φύλλον ''phyllon'', leaf) * * *Tekto: three-dimensional framework *Nickel–Strunz code scheme: NN.XY.##x * *NN: Nickel–Strunz mineral class number * *X: Nickel–Strunz mineral division letter * *Y: Nickel–Strunz mineral family letter * * 抄文引用元・出典: フリー百科事典『 ウィキペディア（Wikipedia）』 ■ウィキペディアで「Borate minerals」の詳細全文を読む スポンサード リンク
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