| 释义 |
pericline Min.|ˈpɛrɪklaɪn|
[mod. f. (Breithaupt 1823) Gr. περικλῑνής sloping all round, on all sides, f. περί around + -κλῑνης sloping, f. κλίνειν to bend, lean; in reference to the great inclination between the terminal and lateral faces.]
A variety of albite found in large opaque white crystals in the chloritic schists of the Alps. Also attrib., as pericline twin, a twin crystal in which the macrodiagonal axis is the twinning-axis, as is frequent in crystals of pericline.
1832C. U. Shepard Min. 186 Perikline. Heterotomous feldspar. 1868Dana Min. (ed. 5) 350 Pericline is in large, opaque, white crystals. 1898Naturalist 176 A zonal structure as well as twinning both on the pericline and albite plans. |