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

= + 0.04180 i + 0.79755 j + 0.60182 k ~°o n

b = 251° h

b = 20° ^

1 %n o o 0.45689 i - 0.52042 J_ + 0.72140 k Between the members A and B there is the Roc Tourné law, the sign of the bisectrix is Ky. K

T = + 0.43510 i - 0.86774 i + 0.24033 k •"

1 o -lb = " 0,42483 i * °'87450 J_ + 0.23402 k o K

T = - 0.42815 i - 0.87399 j. + 0.22987 k lc

o Taking the arithmetical mean of the components of the three vectors : Kj = - 0.42936 i - 0.87208 j_ + 0.23474 k o Kj and Mj are to 90.69° from each other. Zj is obtained by vectorial multiplication. Z = - 0.15768 1 + 0.32830 j_ + 0.93494 k o The bisectrixes of the optical symmetry axes of the members A and C: f = + 0.55998 1 - 0.72316 j + 0.39524 k f

b = + 0.55105 i - 0.73126 A + 0.40199 k o f = + 0.54815 i - 0.73710 i + 0.39526 k -°o Their mean values: f = + 0.55306 i - 0.73217 j_ + 0.39750 k