celsian मीनिंग इन हिंदी

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The symmetry in celsian is somewhat different from the symmetry normally found in feldspars.
Paracelsian is less stable than the other two and celsian is the most stable.
"' Celsian "'is an uncommon feldspar mineral, barium aluminosilicate, transparent in appearance.
As temperature rises from the 1, 600 �C to 1, 760 �C it goes from celsian to a reversible form of hexacelsian.
Other minerals in this group include adularia, anorthoclase, buddingtonite, celsian, hyalophane, microcline, monalbite, orthoclase, and sanidine.
Celsus gave the first description of lithotomy as performed before and during his time, and the operation has ever since borne his name the Celsian method.
The order in celsian is very simple, each aluminium tetrahedron is surrounded by four silicon tetrahedra, and vice versa ( Newham and Megaw, 1960 ).
Insufficient evidence has been found to suggest that celsian lacks a center of symmetry, so its space group is I 2 / c ( Newnham and Megaw, 1960 ).
Celsian shows a c ( 001 ) perfect cleavage and a b ( 010 ) good cleavage, which marks the difference with its polymorph paracelsian which has a [ 110 ] indistinct cleavage.
The base structure becomes either [ AlSi 3 O 8 ] " or [ Al 2 Si 2 O 8 ] 2 " There are 22 mineral species of feldspars, subdivided into two major subgroups alkali and plagioclase and two less common groups celsian and banalsite.