Letter. Crystal morphology of MV-1 magnetite

Letter. Crystal morphology of MV-1 magnetite
复制标题

信。

DOI：
--
复制
发表时间：
2002
期刊：
影响因子：
--
通讯作者：
C. Romanek
C. Romanek
中科院分区：
--
文献类型：
--
作者：
S. Clemett;K. Thomas;Joel Shimmin;M. Morphew;J. Richard McIntosh;D. Bazylinski;J. Kirschvink;S. Wentworth;David S. McKay;H. Vali;Everett K. Gibson;C. Romanek

文献摘要

被引文献

相似文献

由趋磁细菌菌株MV-1制备的胞内磁铁矿（Fe3O4）晶体尺寸在单畴范围内，化学纯度高。我们以前曾提出，它们表现出一种不寻常的晶体习惯，称为截断六-八面体。这种晶体形态在任何无机磁铁矿中都没有被证明，考虑到对称性和自由能，也不会被期望。由此推断，这种形态是生物起源的物理特征。在这里，我们报告了从趋磁细菌中分离出的这种晶体的透射电子显微镜（TEM）断层扫描数据，证实了最初从经典的TEM倾斜成像中提出的不寻常的几何形状。
Abstract Intracellular magnetite (Fe3O4) crystals produced by magnetotactic bacteria strain MV-1 are in the single-domain size range, and are chemically pure. We have previously suggested that they exhibit an unusual crystal habit described as truncated hexa-octahedral. Such a crystal morphology has not been demonstrated for any inorganic population of magnetite, nor would it be expected, given considerations of symmetry and free energy. By inference, this morphology is a physical signature of a biological origin. Here we report data from transmission electron microscope (TEM) tomography of such crystals isolated from magnetotactic bacteria, which confirm the unusual geometry, originally proposed from classical TEM tilt imaging.