方解石

On the basis of crystal structure and crystal chemistry theory,according to the crystal cell parameters,the atomic arrangement of calcite,etc.

从晶体化学、晶体结构的角度，根据方解石的晶胞参数、晶体内原子排列的特点等，提出了方解石最小颗粒的假设。

Hot fluid calcite carbolic isotope ‰ of ~2.9 of ‰ of =-1.2 of δ 13C calcite, show among them C basically originates fluid convection is opposite in circular process of layer of the carbonate in base rock deliquescent.

热液方解石碳同位素δ13C方解石=-1.2‰~2.9‰，显示其中的C主要来源于流体对流循环过程中对基底岩石中碳酸盐地层的溶解。

The processing of making birefringence Iceland glassy prism from calcite crystal, which included orientation, cutting, grinding, polishing, coating, testing of extinction index and so on, were described.

介绍了双折射晶体方解石的加工工艺过程，包括对双折射方解石晶体进行定向、切割、研磨、抛光、消光比的测定等。

Environmental issue has caused widely public concern. In this thesis, the mechanism of calcite cluster structure absorbing environmental infectant has been investigated using quantum chemistry calculation. Using B3LYP calculation method and taking 6-311++G (3df,2pd) basis set in our Gaussian calculations, the results show that the calcite cluster structure can absorb environmental infectant.

在本次研究中，采用了量子化学计算中的B3LYP方法以及6-311++G(3df，2pd)基组进行理论计算，其结果能很好的反映方解石表面分子簇结构吸附环境污染物的情况，为阐明方解石表面分子簇结构吸附环境污染物的机理提供了理论基础。

The composi-tion of the seawater has changed rapidly since Phanerozoic, and the prolonged mineralogical changes of marine non-skeletal limestone and potash evaporates occurred in a phase on a 100-200 Ma.

结果表明：显生宙以来海水组分发生变化，经海相非骨骼灰岩和钾盐蒸发岩矿物学研究，发现这两种沉积岩长期以来连续变化，在"文石海"是MgSO4型蒸发盐，在"方解石海"是KCl型蒸发盐，从白垩纪晚期、第三纪早期的底部石盐溴含量及矿物学特征表明，此时处于"方解石海"，古海水组分的特点是造成缺硫酸盐型钾盐矿床形成的物化基础；通过NaCl-KCl-MgCl2-H2O和NaCl-KCl-MgCl2-CaCl2-H2O两个体系相图的分析认为，当时所形成的成钾原始体系母液是高镁、低钾氯化物型的卤水，在母液蒸发过程中，由于原始海侵母液与残余高镁母液的掺杂作用，致使结晶路线直接从氯化钠区到E点母液或光卤石与氯化钠共饱线上，而没有通过氯化钠和氯化钾的共饱线，因而在矿体中氯化钾相很少或几乎不存在，由于外界CaCl2型水体的掺杂，使成钾母液进入光卤石相区，随着蒸发的进行，最终形成溢晶石矿物。

The XRD and SEM/EDX analyses demonstrated that minerals in Beijing PM10 were clay and quartz, plagioclase, potassium feldspar, albite, calcite, dolomite, hematite, pyrite, magnesite, gypsum, and laumontite, in descending order.

XRD及 FESEM/EDX单颗粒分析表明，北京市PM10中的矿物颗粒以粘土矿物和石英为主，另外还有斜长石、钾长石、钠长石、方解石、白云石、赤铁矿、黄铁矿，菱镁矿、石膏、浊沸石等，矿物颗粒表面的硫化现象常见。2002特大沙尘暴颗粒物中的矿物的含量自大到小分别为粘土矿物、石英、斜长石、方解石、钾长石、赤铁矿、黄铁矿、角闪石和石膏。

These rare calcite deposits, which look a bit like shredded wheat, were found on walls deep within Lechuguilla Cave in Carlsbad Caverns National Park, New Mexico.

意译：这些是稀罕的方解石沉淀物，看起来有点像淡黄色的碎破布，被寻找到方解石在Lechuguilla洞穴之内的墙壁深部，洞穴位于新墨西哥洞窟国家的公园。

Vaterite,a very unstable polymorphism of calcium earbornate,whichrarely appears in nature,has been discovered for the first time by opticalmicroscopy.This paper describes the microscopic characteristics of vateritein lusterless freshwater pearl.

通过红外显微镜微区分析，指出海水珍珠棱柱层不仅仅是由方解石组成，首次提出有三种类型棱柱存在：1方解石棱柱；2文石棱柱；3文石和方解石共同组成的棱柱。

The authors have summarized relevant data studied by overseas scientists and suggested the definition of chalky texture formation as "Chalky texture formation refers to that magnesium calcite and aragonite are transformed into the framework of micrite and microspar of low-magnesium calcite via neomorphism, and result in and maintain intercrystalline pore and throat networks in it; enhanced chalky texture formation refers to that the micrite and microspar are successively subjected to dissolution and leaching, so that the secondary network of solution voids is formed".

综合各国学者的有关研究资料，建议将白垩状结构化定义为：&碳酸盐沉积物和碳酸盐岩中的镁方解石和文石在不同成岩阶段通过新生变形而转变成低镁方解石微晶和微亮晶格架，并在其中产生和保存晶间孔喉网络的作用；强化白垩状结构化是指微晶和微亮晶格架受到进一步溶蚀和淋滤，从而形成次生溶蚀孔隙网络的作用&。

Calcite, smectite, goethite and kaolinite has been used as mineral proxies in the past researches.

研究中使用方解石作为样品最普遍，在方解石、高岭石、蒙脱石和针铁石等矿物中，究竟使用哪种推算古高程产生的误差更小，还需进一步研究。

Objective To investigate the effects of interleukin-1 β converting enzyme gene on the biologic characteristics of ovarian cancer cells.

目的 探讨白细胞介素-1 β转换酶的表达，对卵巢癌细胞生物学特性的影响。

Campylobacter: This illness is the most commonly identified cause of diarrheal illness in the world.

弯曲：这种病是最常见的原因查明腹泻病，在世界上。