Chemical News and Journal of Industrial Science, Tomy 31-32Chemical news office., 1875 |
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Strona 64
for a plane to be a plane of symmetry , the necessary con- ditions are , that it shall be a zone plane , and also parallel to possible faces of the crystal ; conditions , however , which are by no means sufficient for determining its ...
for a plane to be a plane of symmetry , the necessary con- ditions are , that it shall be a zone plane , and also parallel to possible faces of the crystal ; conditions , however , which are by no means sufficient for determining its ...
Strona 101
... plane of symmetry , symmetry to a centre being its only restriction in this regard . In this , the anorthic system , the faces will obey the zone laws already discussed ; and , since the crystal is centro - symmetrical , each plane will ...
... plane of symmetry , symmetry to a centre being its only restriction in this regard . In this , the anorthic system , the faces will obey the zone laws already discussed ; and , since the crystal is centro - symmetrical , each plane will ...
Strona 154
conditions necessary for a potential plane of symmetry . If , now , we call the first three planes of symmetry , S1 , S2 , S3 , and their zone plane the plane C , and if we suppose the plane C to be actually symmetral , the poles of ...
conditions necessary for a potential plane of symmetry . If , now , we call the first three planes of symmetry , S1 , S2 , S3 , and their zone plane the plane C , and if we suppose the plane C to be actually symmetral , the poles of ...
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