﻿Clarice 
  and 
  Steiger 
  — 
  A 
  ction 
  of 
  Ammonium 
  Chloride, 
  etc. 
  117 
  

  

  Art. 
  X. 
  — 
  The 
  Action 
  of 
  Ammonium 
  Chloride 
  updn 
  

   Analcite 
  and 
  Leucite 
  ; 
  by 
  F. 
  W". 
  Clarke 
  and 
  George 
  

   Steiger. 
  

  

  In 
  a 
  recent 
  paper* 
  upon 
  the 
  constitution 
  of 
  certain 
  sili- 
  

   cates, 
  we 
  showed 
  that 
  analcite, 
  when 
  heated 
  with 
  ammonium 
  

   chloride, 
  gave 
  up 
  a 
  part 
  of 
  its 
  soda, 
  and 
  absorbed 
  ammonia 
  to 
  

   an 
  appreciable 
  extent. 
  This 
  result 
  was 
  so 
  remarkable 
  that 
  it 
  

   seemed 
  to 
  demand 
  further 
  investigation, 
  upon 
  material 
  of 
  

   different 
  origin, 
  and 
  with 
  variation 
  in 
  the 
  details. 
  The 
  new 
  

   experiments, 
  which 
  have 
  led 
  to 
  highly 
  interesting 
  conse- 
  

   quences, 
  are 
  now 
  to 
  be 
  described. 
  

  

  The 
  analcite 
  previously 
  studied 
  was 
  from 
  Nova 
  Scotia. 
  To 
  

   the 
  kindness 
  of 
  President 
  Regis 
  Chauvenet 
  of 
  the 
  State 
  School 
  

   of 
  Mines 
  we 
  are 
  indebted 
  for 
  a 
  liberal 
  supply 
  of 
  well-crystal- 
  

   lized 
  material 
  from 
  North 
  Table 
  Mountain, 
  near 
  Grolden, 
  Colo- 
  

   rado, 
  of 
  which 
  a 
  uniform 
  sample 
  of 
  about 
  eighty 
  grams 
  was 
  

   prepared. 
  Upon 
  this 
  sample 
  the 
  present 
  series 
  of 
  experiments 
  

   has 
  been 
  conducted. 
  Analysis 
  of 
  the 
  analcite 
  gave 
  the 
  follow- 
  

   ing 
  results 
  : 
  

  

  Analysis. 
  Water 
  by 
  fractions. 
  

  

  Si0 
  3 
  _. 
  55-72 
  At 
  

  

  A1 
  2 
  3 
  23-06 
  " 
  

  

  CaO 
  -17 
  

  

  Na 
  9 
  0.__ 
  12-46 
  " 
  

  

  H,0 
  at 
  100° 
  -13 
  

  

  HO 
  above 
  100° 
  ... 
  8-26 
  " 
  

  

  99-80 
  

  

  1UU 
  

  

  180° 
  

  

  '13 
  

  

  ..- 
  -75 
  

  

  260° 
  

  

  300° 
  

  

  350° 
  

  

  redness 
  . 
  . 
  _ 
  

  

  ... 
  2-44 
  

   ... 
  1-28 
  

   ... 
  1*76 
  

   . 
  .. 
  2-03 
  

  

  Total 
  

  

  ... 
  839 
  

  

  Above 
  a 
  low 
  red 
  heat 
  no 
  further 
  loss 
  of 
  weight 
  was 
  observed. 
  

   Upon 
  boiling 
  the 
  powdered 
  mineral 
  for 
  fifteen 
  minutes 
  with 
  a 
  

   twenty-five 
  per 
  cent 
  solution 
  of 
  sodium 
  carbonate, 
  0-15 
  per 
  

   cent 
  of 
  silica 
  was 
  dissolved. 
  After 
  ignition, 
  0'57 
  per 
  cent 
  was 
  

   soluble, 
  which 
  is 
  practically 
  the 
  same 
  amount. 
  No 
  silica 
  was 
  

   split 
  off 
  by 
  heating. 
  

  

  The 
  experiments 
  with 
  ammonium 
  chloride 
  fall 
  into 
  two 
  

   series. 
  The 
  first 
  of 
  these 
  was 
  conducted 
  precisely 
  as 
  in 
  our 
  

   former 
  investigation, 
  by 
  grinding 
  the 
  powdered 
  mineral 
  into 
  

   an 
  intimate 
  mixture 
  with 
  four 
  times 
  its 
  weight 
  of 
  chloride, 
  and 
  

   heating 
  in 
  an 
  open 
  crucible. 
  In 
  three 
  cases 
  the 
  material, 
  after 
  

   volatilization 
  of 
  the 
  ammonium 
  chloride, 
  was 
  reground 
  with 
  a 
  

   fresh 
  amount 
  of 
  the 
  salt, 
  and 
  then 
  heated 
  again. 
  The 
  tem- 
  

   perature 
  and 
  duration 
  of 
  the 
  experiments 
  was 
  purposely 
  some- 
  

   what 
  varied. 
  After 
  heating, 
  the 
  material 
  was 
  leached 
  out 
  with 
  

  

  ♦This 
  Journal, 
  October, 
  1899. 
  

  

  Am. 
  Jour. 
  Sci. 
  — 
  Fourth 
  Series, 
  Vol. 
  IX, 
  Xo. 
  50. 
  — 
  February. 
  1900. 
  

   9 
  

  

  