...
首页> 外文期刊>Neues Jahrbuch fur Mineralogie, Monatshefte >Hydroxylapatite, brushite and ardealite in the bat guano deposit from Pestera Mare de la Meresti, Persani Mountains, Romania
【24h】

Hydroxylapatite, brushite and ardealite in the bat guano deposit from Pestera Mare de la Meresti, Persani Mountains, Romania

机译:罗马尼亚佩尔萨尼山的Pestera Mare de la Meresti蝙蝠鸟粪矿床中的羟基磷灰石,透钙磷石和埃迪石

获取原文
获取原文并翻译 | 示例
   

获取外文期刊封面封底 >>

       

摘要

The paper aims to give details on the phosphate association from the Meresti Cave, Persani Mountains, Romania. Ca-phosphates (i. e., hydroxylapatite, brushite and ardealite) are the main components of the guano deposit inside this cave. Associated minerals include gypsum, low quartz, 2M1 illite, interstratified kaolinite-illite, calcite and X-ray amorphous iron sesquioxides. Hydroxylapatite {[Ca_(9.804)Mn_(0.004)Mg_(0.067)Fe~(2+)_(0.054)K_(0.002)Na_(0.003)](P_(5.934)S_(0.066_)O_(23.929)(OH)_(2.071)) has a = 9.434(3) A, c = 6.868(3) A and V = 529.7(3) A~3, D_x = 3.142g/cm~3, D = 3.14(1) g/cm~3, omega = 1.647(1) and epsilon = 1.641(1). CO_3 bands in the infrared absorption spectrum (V_3 = 1466cm~(-1), V_3' = 1430cm~(-1), v_2 = 872cm~(-1)) show that hydroxylapatite from Meregti is carbonate-bearing. Brushite has the mean chemical-structural formula [Ca_(0.984)Mn_(0.002)Mg_(0.009)Fe~(2+)_(0.054)K_(0.001)Na_(0.001)](HPO_4)_(0.976)(SO_4)_(0.024) centre dot 2H_2O. Both unit cell [a = 5.812(5) A, b = 15.169(5) A, c = 6.239(4) A and beta = 116.35(13) deg] and physical parameters [D = 2.32(1) g/cm~3, alpha = 1.540(2), beta = 1.546(2), gamma_(calc) = 1.551, for 2V_(alpha) = 86 deg] characterize a term close to stoichiometry. Ardealite has the mean chemical structural formula {[Ca_(1.992)Mg_(0.004)Fe~(2+)_(0.002)K_(0.001)Na_(0.001)](HPO_4)_(1.021)(SO_4)_(0.979) centre dot 4H_2O}. Its mean unit-cell parameters are a = 5.718(3) A, b = 30.998(24) A, c = 6.248(5) A and (3 = 117.17(5) deg, and the measured physical constants a = 1.529(2), (3 = 1.537(2), y (calculated for 2V_alpha = 86 deg) = 1.544, and D = 2.327(3) g/cm~3. The textural relationships between the three calcium phosphates, observed by scanning electron microscopy and energy dispersive electron microprobe analysis, suggests that their sequence of crystallization was from hydroxylapatite to brushite and finally ardealite. All the three species clearly resulted from the reaction between the strongly acidic solutions derived from the guano mass and the cave floor or moon-milk flows.
机译:本文旨在详细介绍罗马尼亚佩尔萨尼山(Persani Mountains)的梅雷斯蒂洞穴(Meresti Cave)中的磷酸盐结合。钙磷酸盐(即羟磷灰石,透钙磷石和硬石)是该洞穴内部鸟粪沉积物的主要成分。相关矿物包括石膏,低石英,2M1伊利石,层状高岭石-伊利石,方解石和X射线无定形三氧化二铁。羟基磷灰石{[Ca_(9.804)Mn_(0.004)Mg_(0.067)Fe〜(2 +)_(0.054)K_(0.002)Na_(0.003)](P_(5.934)S_(0.066_)O_(23.929)(OH )_(2.071))的a = 9.434(3)A,c = 6.868(3)A和V = 529.7(3)A〜3,D_x = 3.142g / cm〜3,D = 3.14(1)g / cm〜3,ω= 1.647(1),ε= 1.641(1)。红外吸收光谱中的CO_3谱带(V_3 = 1466cm〜(-1),V_3'= 1430cm〜(-1),v_2 = 872cm〜(-1))表明,Meregti产的羟基磷灰石含碳酸盐。透钙磷石的平均化学结构式为[Ca_(0.984)Mn_(0.002)Mg_(0.009)Fe〜(2 +)_(0.054)K_(0.001)Na_(0.001)](HPO_4)_(0.976)(SO_4) _(0.024)中心点2H_2O。两种晶胞[a = 5.812(5)A,b = 15.169(5)A,c = 6.239(4)A和beta = 116.35(13)deg]和物理参数[D = 2.32(1)g / cm〜在图3中,α= 1.540(2),β= 1.546(2),gamma_(计算)= 1.551,对于2V_α= 86度表征接近化学计量的术语。 Ardealite具有平均化学结构式{[Ca_(1.992)Mg_(0.004)Fe〜(2 +)_(0.002)K_(0.001)Na_(0.001)](HPO_4)_(1.021)(SO_4)_(0.979)中心点4H_2O}。其平均晶胞参数为a = 5.718(3)A,b = 30.998(24)A,c = 6.248(5)A和(3 = 117.17(5)度),测得的物理常数a = 1.529(2) ),(3 = 1.537(2),y(对于2V_alpha = 86度计算)= 1.544,D = 2.327(3)g / cm〜3。三种磷酸钙之间的结构关系,通过扫描电子显微镜和能量色散电子探针分析表明,它们的结晶顺序是从羟基磷灰石到透钙磷石,最后是硬硅钙石,这三个物种显然都是由鸟粪物质产生的强酸性溶液与洞穴底部或月乳流之间的反应引起的。

著录项

相似文献

  • 外文文献
  • 中文文献
  • 专利
获取原文

客服邮箱:kefu@zhangqiaokeyan.com

京公网安备:11010802029741号 ICP备案号:京ICP备15016152号-6 六维联合信息科技 (北京) 有限公司©版权所有
  • 客服微信

  • 服务号