Dept. of Physics, SVD College, Cuddapah 516 003, India.
Spectrochim Acta A Mol Biomol Spectrosc. 2014 Jan 3;117:270-5. doi: 10.1016/j.saa.2013.08.028. Epub 2013 Aug 15.
Manganese minerals ardenite, alleghanyite and leucopoenicite originated from Madhya Pradesh, India, Nagano prefecture Japan, Sussex Country and Parker Shaft Franklin, Sussex Country, New Jersey respectively are used in the present work. In these minerals manganese is the major constituent and iron if present is in traces only. An EPR study of on all of the above samples confirms the presence of Mn(II) with g around 2.0. Optical absorption spectrum of the mineral alleghanyite indicates that Mn(II) is present in two different octahedral sites and in leucophoenicite Mn(II) is also in octahedral geometry. Ardenite mineral gives only a few Mn(II) bands. NIR results of the minerals ardenite, leucophoenicite and alleghanyite are due to hydroxyl and silicate anions which confirming the formulae of the minerals.
本工作使用了分别来自印度中央邦、日本长野县、苏塞克斯郡和新泽西州帕克 shaft 富兰克林的锰矿物水锌矿、辉砷镍矿和白钨矿。这些矿物中锰是主要成分，铁则以痕量存在。对所有上述样品的 EPR 研究证实存在 g 约为 2.0 的 Mn(II)。矿物辉砷镍矿的光吸收光谱表明 Mn(II)存在于两个不同的八面体位置，而白钨矿中的 Mn(II)也呈八面体几何形状。水锌矿矿物仅给出少数 Mn(II)带。水锌矿、白钨矿和辉砷镍矿的近红外结果归因于羟基和硅酸盐阴离子，这证实了矿物的化学式。
