370 SILICATES. 210. ALBITE.—Albite; Phillips, Beudant. Heterotomer Peld-Spath, Tetartoprismatiscber Feld-Spath ; Molis. Alb it; Hausmann. Albit, Periklin; Haidinger. Anorthic. Ho,110=57° 45'; 010,110=60° 8'; 001,110=64° 55'; 111,001 = 57° 37'; 110,001 = 69° 9'. m oio, P 001, e 021, n 021, X 101, y 201, I lio, z 130 , f 130, S 111, 0 111, k 112, 9 ll2. trn 62° 7' sm 59° 33' pV 69° 9' Im 60 8 xs 25 19 te 62 19 It' 67 45 ox 27 19 es 42 46 fm 31 30 om' 67 49 sy 39 27 zrn 30 48 tp 64 65 yt 45 28 mp 86 24 P9 29 55 l 9 41 26 pm' 93 36 9° 27 42 yo 39 0 np 46 5 of 67 28 on 48 4 ep 42 34 si 55 7 nV 61 30 xp 62 37 ks 25 64 tmp 63 26 yx 29 46 pk 29 60 knx 63 49 FIG. 385. FIG. 387. Combinations. xoptbn, xyognpltfzm, xsonptlzfm. Twins. 1. Iwin-face m (fig. 386). pd = - 7° 12'. xx = - 10° 16'. 2. iwin-axis the axis of the zone tml. 3. Twin-axis the axis of r,»tf ZC ? e Cleava £ e - P, very perfect; m, less perfect; t, im- penect. 1 racturc imperfect conchoidal... uneven. The faces ’ striated parallel to their intersections with each the P rlJL USU T ll y, unev f n » rough. Transparent...translucent on g . Lustre vitreous ; on cleavage faces, especially p,