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

n

b = 260' h

b = 29.9 b„ = + 0.85714 i - 0.15114 j_ + 0.49242 k Sc. ^c x Sc o o Twin member D: = - 0.50641 i - 0.07255 i + 0.85924 k o n

b = 120.5 h

b = 20' b^ = - 0.80967 i - 0.47693 i + 0.34202 k /0 -, ryO n

c = 217' h = 17' c ç

D = + 0.57552 i - 0.76374 A + 0.29237 k SD O 0 = + 0.12177 i + 0.43356 A + 0.89286 k Twin member E: n = 28' a ag = - 0.46768 i + 0.87959 A + 0.08716 k n, = 120' b h, = 21' b b„ = - 0.80851 i - 0.46679 A + 0.35837 k SE X

^E = + 0.35591 i + 0.09713 i + 0.92947 k Between the members A.and B the Roc Tourné twinning law can be determined, the bisectrixes are signed by Kj. K

T = + 0.51960 i - 0.41419 A + 0.74730 k o K

Ib = + 0.52394 i - 0.40756 A + 0.74792 k = + 0.53006 i - 0.41080 A + 0.74182 k The angles of the optical symmetry axes: between|n

a

j and pißj 0.45°, between[n

a

J andpijl 0.68° and between[n

p

] andpj °'4-5°.