﻿346 
  Clarke 
  and 
  Steiger 
  — 
  Action 
  of 
  Ammonium 
  Chloride 
  

  

  mortar 
  with 
  four 
  times 
  its 
  weight 
  of 
  dry 
  ammonium 
  chloride, 
  

   after 
  which 
  it 
  was 
  heated 
  to 
  350° 
  in 
  the 
  sealed 
  tube. 
  Even 
  

   during 
  the 
  grinding 
  a 
  slight 
  reaction 
  took 
  place, 
  and 
  a 
  distinct 
  

   smell 
  of 
  ammonia 
  was 
  given 
  off 
  by 
  the 
  mixture. 
  With 
  pecto- 
  

   lite 
  the 
  same 
  smell 
  was 
  perceived. 
  The 
  three 
  experiments 
  

   may 
  be 
  summarized 
  as 
  follows 
  : 
  

  

  A. 
  Heated 
  11 
  hours. 
  Upon 
  leaehing, 
  14*89 
  per 
  cent 
  of 
  soda 
  and 
  

  

  1*20 
  of 
  lime 
  were 
  extracted. 
  In 
  the 
  residue 
  9*26 
  per 
  cent 
  of 
  

   ammonia 
  was 
  found. 
  

  

  B. 
  Heated 
  9 
  hours. 
  Leach 
  not 
  examined. 
  9*26 
  of 
  ammonia 
  in 
  

  

  residue. 
  The 
  complete 
  analysis 
  of 
  the 
  residue 
  is 
  given 
  

   farther 
  on. 
  

  

  C. 
  Heated 
  3 
  hours. 
  14*09 
  per 
  cent 
  of 
  soda 
  and 
  0*20 
  of 
  lime 
  were 
  

  

  extracted. 
  The 
  residue 
  contained 
  8*87 
  per 
  cent 
  of 
  ammonia. 
  

   In 
  this 
  instance 
  the 
  heating 
  was 
  relatively 
  brief, 
  in 
  order 
  to 
  

   learn 
  whether 
  its 
  duration 
  could 
  be 
  advantageously 
  lessened. 
  

   The 
  reaction 
  was 
  evidently 
  less 
  complete 
  than 
  in 
  experiments 
  

   A 
  and 
  B. 
  

  

  In 
  the 
  subjoined 
  table 
  we 
  give 
  first 
  the 
  analysis 
  of 
  the 
  natro- 
  

   lite 
  itself, 
  and 
  then 
  that 
  of 
  the 
  leached 
  residue 
  from 
  experi- 
  

   ment 
  B. 
  In 
  the 
  latter 
  we 
  found 
  that 
  0*86 
  per 
  cent 
  of 
  silica 
  

   was 
  soluble 
  in 
  sodium 
  carbonate 
  solution 
  ; 
  and 
  that 
  soda 
  and 
  

   lime 
  remained 
  corresponding 
  to 
  4*61 
  per 
  cent 
  of 
  the 
  original 
  

   mineral. 
  Deducting 
  these 
  impurities, 
  together 
  with 
  the 
  0'42 
  

   per 
  cent 
  of 
  hygroscopic 
  water, 
  and 
  recalculating 
  to 
  100 
  per 
  

   cent, 
  we 
  get 
  the 
  reduced 
  composition 
  of 
  the 
  residue. 
  In 
  the 
  

   last 
  column 
  is 
  given 
  the 
  calculated 
  composition 
  of 
  an 
  anhydrous 
  

   ammonium-natrolite, 
  (£TH 
  4 
  ) 
  2 
  Al 
  2 
  Si 
  3 
  O 
  10 
  . 
  This 
  compound 
  has 
  

   evidently 
  been 
  formed 
  to 
  an 
  extent 
  represented 
  by 
  over 
  94 
  

   per 
  cent 
  of 
  the 
  leached 
  natrolite 
  residue. 
  The 
  agreement 
  

   between 
  theory 
  and 
  even 
  the 
  unreduced 
  analysis 
  is 
  practically 
  

   conclusive 
  on 
  this 
  point. 
  

  

  Natrolite 
  Residue 
  Residue 
  (NH4) 
  2 
  Al 
  2 
  Si30io 
  

   found. 
  found. 
  reduced. 
  calculated. 
  

  

  Si0 
  2 
  46:62 
  53-71 
  53*86 
  54-06 
  

  

  A1 
  2 
  3 
  ... 
  26-04 
  29-94 
  30'52 
  30'43 
  

  

  CaO 
  1-48 
  -34 
  

  

  K 
  2 
  none 
  

  

  Na 
  2 
  15-67 
  -37 
  

  

  NH 
  3 
  _ 
  __ 
  9-26 
  9-85 
  10*14 
  

  

  H 
  2 
  Oatl00° 
  -39 
  -42 
  

  

  H 
  2 
  above 
  100° 
  .. 
  10-18 
  5-94 
  5'77 
  5-37 
  

  

  100-38 
  99-98 
  lOO'OO 
  100*00 
  

  

  It 
  may 
  not 
  be 
  superfluous 
  to 
  note 
  that 
  the 
  water 
  given 
  in 
  the 
  

   last 
  two 
  columns 
  represents 
  the 
  difference 
  between 
  ammonia 
  

   and 
  the 
  hypothetical 
  ammonium 
  oxide 
  which 
  has 
  replaced 
  soda. 
  

  

  