﻿Palache 
  and 
  Graham 
  — 
  Crystallization 
  of 
  Willemite. 
  643 
  

  

  Measured 
  

   <j> 
  p 
  

  

  £ 
  + 
  61 
  (Z)(13'5'8-3) 
  7°30' 
  7l°53' 
  

  

  1 
  20 
  71 
  30 
  

  

  Calculated... 
  7 
  35 
  7107 
  

  

  i0 
  + 
  16-l(J)(14-5-9'l) 
  3 
  03 
  82 
  07 
  

  

  3 
  01 
  82 
  30 
  

  

  Calculated 
  

  

  3 
  00 
  

  

  82 
  17 
  

  

  The 
  relations 
  of 
  the 
  forms 
  found 
  on 
  the 
  Franklin 
  Furnace 
  

   willemite 
  are 
  well 
  brought 
  out 
  in 
  the 
  gnomonic 
  projection, 
  fig. 
  

   4, 
  in 
  which 
  they 
  are 
  plotted 
  and 
  the 
  positive 
  and 
  negative 
  sec- 
  

   tants 
  with 
  the 
  right 
  and 
  left 
  subdivisions 
  are 
  indicated. 
  The 
  

   most 
  striking 
  feature 
  of 
  the 
  form 
  development 
  is 
  the 
  marked 
  

   nature 
  of 
  the 
  rhombohedral-tetartohedrism, 
  more 
  pronounced 
  

   even 
  than 
  in 
  phenacite. 
  There 
  is, 
  moreover, 
  the 
  greatest 
  

  

  Table 
  III. 
  

  

  

  Symbol 
  

  

  * 
  

  

  P 
  

  

  Localities 
  

  

  — 
  

   © 
  

  

  G 
  2 
  

  

  Bravais 
  

  

  Moresnet 
  

  

  Franklin 
  

   Furnace 
  

  

  New- 
  

   Mexico* 
  

  

  Green- 
  

   landf 
  

  

  c 
  

  

  

  

  (0001) 
  

  

  00°00 
  

  

  00°00' 
  

  

  X 
  

  

  X 
  

  

  X 
  

  

  X 
  

  

  a 
  

  

  ocO 
  

  

  (1120) 
  

  

  00 
  00 
  

  

  90 
  00 
  

  

  __ 
  

  

  X 
  

  

  X 
  

  

  X 
  

  

  m 
  

  

  GO 
  

  

  (1010) 
  

  

  30 
  00 
  

  

  90 
  00 
  

  

  X 
  

  

  X 
  

  

  __ 
  

  

  X 
  

  

  f 
  

  

  3co 
  

  

  (5270) 
  

  

  -46 
  06 
  

  

  90 
  00 
  

  

  _. 
  

  

  

  

  X 
  

  

  m 
  

  

  4oo 
  

  

  (3120) 
  

  

  -10 
  54 
  

  

  90 
  00 
  

  

  ._ 
  

  

  X 
  * 
  

  

  

  

  u 
  

  

  10(0 
  

  

  (2113) 
  

  

  00 
  00 
  

  

  24 
  00 
  

  

  __ 
  

  

  X 
  

  

  X 
  

  

  X 
  

  

  s 
  

  

  01(r) 
  

  

  (1123) 
  

  

  60 
  00 
  

  

  24 
  00 
  

  

  __ 
  

  

  x 
  

  

  

  X 
  

  

  e 
  

  

  -i 
  

  

  (0112) 
  

  

  30 
  00 
  

  

  21 
  05 
  

  

  .. 
  

  

  x 
  

  

  X 
  

  

  X 
  

  

  P 
  

  

  + 
  1 
  

  

  (3034) 
  

  

  -30 
  00 
  

  

  30 
  03 
  

  

  X 
  

  

  __ 
  

  

  _. 
  

  

  __ 
  

  

  r 
  

  

  + 
  1 
  

  

  (1011) 
  

  

  i 
  i 
  

  

  37 
  39 
  

  

  ,. 
  

  

  X 
  

  

  X 
  

  

  X 
  

  

  z 
  

  

  -1 
  

  

  (0111) 
  

  

  30 
  00 
  

  

  37 
  39 
  

  

  ._ 
  

  

  

  X 
  

  

  __ 
  

  

  n 
  

  

  -2 
  

  

  (0221) 
  

  

  a 
  

  

  57 
  03 
  

  

  

  X 
  

  

  

  

  V 
  

  

  -i 
  ¥r) 
  

  

  (1325) 
  

  

  10 
  54 
  

  

  22 
  11 
  

  

  

  

  X 
  

  

  

  o 
  

  

  + 
  21(0 
  

  

  (5143) 
  

  

  -19 
  06 
  

  

  49 
  41 
  

  

  .. 
  

  

  X 
  

  

  

  .. 
  

  

  k 
  

  

  +|1(0 
  

  

  (4 
  32) 
  

  

  -16 
  06 
  

  

  54 
  17 
  

  

  _. 
  

  

  X 
  

  

  _. 
  

  

  ._ 
  

  

  X 
  

  

  + 
  41(0 
  

  

  (3121) 
  

  

  -10 
  54 
  

  

  63 
  53 
  

  

  

  X 
  * 
  

  

  

  X 
  

  

  y 
  

  

  + 
  41(r) 
  

  

  (2131) 
  

  

  -49 
  06 
  

  

  63 
  53 
  

  

  __ 
  

  

  X 
  

  

  

  X 
  

  

  t 
  

  

  + 
  61(0 
  

  

  (13-5-8-3) 
  

  

  -7 
  35 
  

  

  7107 
  

  

  

  X 
  

  

  

  

  3 
  

  

  + 
  10-1(0 
  

  

  (7341) 
  

  

  -4 
  43 
  

  

  77 
  58 
  

  

  

  X 
  

  

  .. 
  

  

  

  %{f) 
  

  

  + 
  10-l(r) 
  

  

  (4371) 
  

  

  -55 
  17 
  

  

  77 
  58 
  

  

  _. 
  

  

  X 
  

  

  _. 
  

  

  __ 
  

  

  w 
  

  

  + 
  16-1(0 
  

  

  (14-5-9-1) 
  

  

  -3 
  00 
  

  

  82 
  17 
  

  

  

  X 
  

  

  __ 
  

  

  __ 
  

  

  d 
  

  

  -2i(0 
  

  

  (1232) 
  

  

  49 
  06 
  

  

  45 
  34 
  

  

  

  X 
  

  

  _. 
  

  

  

  D 
  

  

  -»»(r) 
  

  

  (1322) 
  

  

  10 
  54 
  

  

  45 
  34 
  

  

  

  X 
  

  

  .. 
  

  

  ._ 
  

  

  9 
  

  

  -52(0 
  

  

  (1341) 
  

  

  43 
  54 
  

  

  70 
  13 
  

  

  ._ 
  

  

  X 
  

  

  .. 
  

  

  

  I 
  

  

  -74(0 
  

  

  (1561) 
  

  

  38 
  57 
  

  

  76 
  54 
  

  

  -- 
  

  

  X 
  

  

  -- 
  

  

  -- 
  

  

  * 
  Penfield, 
  this 
  Journal, 
  xlvii, 
  305, 
  1894. 
  

  

  f 
  Boeggild, 
  Mineral. 
  Groenland, 
  p. 
  276, 
  1905. 
  

  

  