钙沸石是沸石族矿物之一,它与钠沸石相似并有着密切的关系。单斜晶系。晶体柱状或针状,也常见纤维状、块状集合体。无色或白、灰、淡黄、黄、浅粉红等色。透明-微透明。玻璃光泽-丝绢光泽。产于玄武岩、响岩等喷发岩的气孔和裂隙中;也见于接触变质带。优质大晶体(5~10克拉)仅见于印度浦那(poona)和巴西南里奥格兰德州。可用于磨制宝石。
n. scolecite
misc. poonahlite
...族群里的一种矿物,其结构和成分与性质皆和钠沸石相似,但由于钠沸石中钠的成分有一部分被钙所取代,因其钠钙比例约1:1,介于钠沸石和钙沸石(scolecite)中间,因而称为中沸石。此外,又由于钠沸石族群外型通常呈现针状放射体,因此中沸石又称中性针沸石。
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发现钙、镁、镧离子交换的丝光沸石,在表现出较高活性的同时,还对二甲胺具有55%左右的高选择性。
It has been found that the Ca, Mg, la ion exchanged mordenites have both high activity and high selectivity toward dimethylamine with the yield of around 55%.
研究了粉煤灰、低钙石与沸石的优化组合对水泥物理性能的影响。
The effect of optimum grouping of fly ash, low calcium stone and zeolite on cement physical property in studied.
试验结果表明,选用粉煤灰、低钙石与沸石复合三掺,并相应提高粉磨细度,可明显地提高大掺量粉煤灰复合水泥的强度。
Test result shows that the mixing of this three materials accompany with increasing grind fineness, the strength of compound cement with large amount of fly ash can be improved significantly.
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