Dr. Nagy I. Zoltán szerk.: Fragmenta Mineralogica Et Palaentologica 4. 1973. (Budapest, 1973)

The arithmetical mean of the adequate components is taken as the centre of the triangle of error, this hardly deviates from the unit vector. K

T = + 0.52453 i - 0.41085 A + 0.74568 k 0 The bisectrixes of the Carlsbad twinning axis being between the members A and C are denoted by Z. Z

T = - 0.20212 i + 0.78760 A + 0.58209 k 0 Z

Ib - - O.2519O i + O.69315 A + 0-64074 k o Z

T = - 0.20310 i + 0.78777 A + 0.58153 k lc

o Due to tie closeness of the two [no] compution is performed not by taking the triangle of error, but taking the arithmetical mean of the bisectrixes offnj and^n^J. Zj = - 0.20261 i + 0.78769 A + 0.58181 k o Between the members B and C the Albite law can be determined, the bisectrixes are denoted by Mj. M = - 0.83262 i - O.45239 A + O.3195O k o M

Tb = - 0.82903 i - 0.44422 A + 0.33974 k 0 M

T = - 0.82321 i - 0.45898 A + 0.33415 k lc

o The angular distance between the bisectrixes [p.^] and[np] is 1.21°, between[n

a

] and[n

Y

J 1.09° and between[n^| and[n

Y

] 0.89°. The arithmetical mean of the components is taken as the centre of the triangle of error converting it into unit vector. M = - 0.82834 i - 0.45189 A + 0.33115 k 0 The angular distance between the unit vectors K

T and M

T is