‘Crystals of the calcareous cyst wall layer are orientated with their crystallographic optic axis (c-axis) tangential to the cyst's surface.’
‘However, this surface enhancement with a focused beam only occurs from surfaces perpendicular to the optic axis and would not explain the appearance of the axially oriented surfaces evident in both figures.’
‘Even if the objects are located along the optic axis, the three images will be separated and are available for separate inspection.’
‘Assume we have a thin section with a grain oriented so that we are looking down an optic axis.’
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