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

n

c = 99.2° h

c = 35° c

r = - 0.80830 i + 0.13285 A + 0.57358 k a„ X c„ ! = + 0.58507 i - 0.07217 A + 0.80776 k 0 Twin member D: n = 68° h = 4° a a a = - 0.92492 i + 0.37370 £ + 0.06976 k -D o n

c = 335° h

c = 37° ç

D = + 0.33752 i + 0.72382 j_ + 0.60182 k o a X ç

D = - 0.17441 i - 0.58019 j. + 0.79561 k o oj Twin member E

: n

Ä = 262.5° h = 9° c^ = + 0.97924 i - 0.12892 A + 0.15643 k n

a = 358.5° h

a = 34° = + 0.02170 i + 0.82876 A + 0.55919 k _E

O _ b

E o £

E X SE o o - 0.20173 i - 0.54419 i + 0.81435 k A and B members = Roc Tourné twins (Kj) C and D members - Albite twins (

M

jj) D and E members = Carlsbad twins (Zjj) C and E members = Roc Tourné twins (KJJ) The [ooij zone axis (Carlsbad law) is of course the same in the two groups. Z

TT = - 0.55408 i + 0.73765 A + 0.38583 k —

~_l J_a o Z

IIb = - 0.55766 i + 0.73484 £ + 0.38252 k o