【摘要】 <正> 红帘石是一种富含Mn³⁺的绿帘石,它与绿帘石和斜黝帘石为等构造矿物,空间群为P2₁/m,它们的结构式分别为: 斜黝帘石 Ca₂Al₃O[SiO₄][Si₂O₇][OH], 绿帘石 Ca₂（Al,Fe）Al₂O[SiO₄][Si₂O₇][OH], 红帘石 Ca₂（Al,Fe,Mn）₂AlO[SiO₄][Si₂O₇][OH]。更多还原

【Abstract】 The number of(Fe³⁺+Mn³⁺)in unit formula of piemontite from the Hainan Island is characteristically greater than 1 with Fe exceeding Mn in amount. Appreciable ordering is confirmed with respect to major ions, such as Fe³⁺ and Mn³⁺ in the crystal structure of plemontite through electron paramagnetic resonance,infrared,Mssbauer,polarized absorption spectra measurements, which accounts for the pleochroism of this mineral and the stability of Mn³⁺ ions in its structure.更多还原