﻿22 
  S. 
  L. 
  Penfield 
  — 
  Graftonite, 
  a 
  new 
  Mineral. 
  

  

  material 
  of 
  each 
  substance 
  being 
  employed, 
  water 
  was 
  first 
  

   estimated 
  by 
  ignition 
  in 
  a 
  closed 
  tube, 
  as 
  described 
  by 
  the 
  

   author.* 
  The 
  contents 
  of 
  the 
  tube 
  were 
  then 
  dissolved 
  in 
  

   hydrochloric 
  acid, 
  the 
  solution 
  evaporated 
  to 
  dryness 
  and 
  the 
  

   residue 
  was 
  taken 
  up 
  in 
  water 
  and 
  a 
  very 
  little 
  acid. 
  To 
  this 
  

   solution, 
  heated 
  to 
  boiling, 
  barium 
  hydroxide 
  was 
  added, 
  which 
  

   precipitated 
  barium 
  phosphate, 
  along 
  with 
  the 
  iron, 
  manganese, 
  

   magnesium 
  and 
  the 
  bulk 
  of 
  the 
  calcium, 
  leaving 
  the 
  alkalies 
  

   in 
  solution. 
  After 
  filtering, 
  the 
  barium 
  was 
  separated 
  from 
  

   the 
  filtrate 
  by 
  means 
  of 
  ammonia 
  and 
  ammonium 
  carbonate, 
  

   and 
  the 
  alkalies 
  were 
  finally 
  obtained 
  in 
  the 
  form 
  of 
  chlorides. 
  

   From 
  the 
  very 
  hygroscopic 
  character 
  of 
  the 
  chlorides 
  it 
  was 
  

   evident 
  that 
  lithium 
  was 
  the 
  prevailing 
  alkali, 
  and, 
  since 
  the 
  

   quantities 
  were 
  small, 
  it 
  was 
  considered 
  best 
  to 
  weigh 
  the 
  

   alkalies 
  as 
  sulphates, 
  and 
  subsequently 
  determine 
  the 
  S0 
  3 
  , 
  thus 
  

   obtaining 
  data 
  for 
  estimating 
  both 
  the 
  per 
  cent 
  of 
  the 
  alkali 
  

   oxides, 
  .R 
  2 
  0, 
  and 
  their 
  joint 
  molecular 
  weight. 
  The 
  precipi- 
  

   tate 
  produced 
  by 
  barium 
  hydroxide, 
  containing 
  the 
  phosphoric 
  

   acid 
  and 
  bases, 
  was 
  dissolved 
  in 
  hydrochloric 
  acid, 
  and 
  barium 
  

   was 
  precipitated 
  by 
  means 
  of 
  sulphuric 
  acid. 
  The 
  barium 
  pre- 
  

   cipitates, 
  obtained 
  at 
  this 
  stage 
  of 
  the 
  analysis 
  and 
  from 
  the 
  

   alkali 
  separations, 
  were 
  carefully 
  examined 
  for 
  traces 
  of 
  P 
  2 
  & 
  

   and 
  bases. 
  The 
  filtrate 
  from 
  the 
  barium 
  sulphate, 
  containing 
  

   P 
  2 
  B 
  and 
  bases, 
  after 
  evaporating 
  to 
  dryness 
  and 
  taking 
  up 
  in 
  a 
  

   very 
  little 
  acid, 
  was 
  diluted, 
  heated 
  to 
  boiling, 
  precipitated 
  by 
  

   an 
  excess 
  of 
  sodium 
  carbonate 
  and 
  filtered. 
  The 
  filtrate 
  con- 
  

   tained 
  the 
  bulk 
  of 
  the 
  P 
  2 
  B 
  , 
  which 
  was 
  precipitated 
  by 
  mag- 
  

   nesia 
  mixture. 
  The 
  precipitate 
  consisted 
  of 
  basic 
  phosphates 
  

   and 
  carbonates 
  of 
  iron, 
  manganese, 
  magnesium 
  and 
  calcium. 
  

   The 
  latter 
  was 
  dissolved 
  in 
  a 
  little 
  hydrochloric 
  acid, 
  and 
  the 
  

   iron 
  in 
  combination 
  with 
  the 
  P 
  2 
  5 
  was 
  separated 
  by 
  a 
  basic 
  

   acetate 
  precipitation. 
  After 
  filtering, 
  the 
  precipitate 
  was 
  dis- 
  

   solved 
  in 
  acid, 
  the 
  iron 
  together 
  with 
  the 
  P 
  2 
  5 
  was 
  precipitated 
  

   with 
  ammonia, 
  weighed 
  and 
  subsequently 
  the 
  P 
  2 
  5 
  was 
  sepa- 
  

   rated 
  by 
  means 
  of 
  ammonium 
  molybdate. 
  In 
  the 
  filtrate 
  from 
  

   the 
  basic 
  acetate 
  precipitate 
  the 
  manganese, 
  magnesium 
  and 
  

   calcium 
  were 
  estimated 
  by 
  well 
  known 
  methods. 
  

  

  The 
  results 
  of 
  the 
  analyses 
  are 
  given 
  below, 
  together 
  with 
  

   the 
  analysis 
  made 
  by 
  Mr. 
  Ford 
  on 
  partially 
  purified 
  material. 
  

  

  The 
  analysis 
  of 
  the 
  triphylite, 
  though 
  showing 
  a 
  slight 
  

   deficiency, 
  compares 
  favorably 
  with 
  the 
  analyses 
  of 
  triphylite 
  

   from 
  Bodenmais, 
  Bavaria 
  and 
  Norwich, 
  Mass., 
  made 
  by 
  the 
  

   authorf 
  and 
  quoted 
  in 
  Dana's 
  Mineralogy, 
  page 
  757. 
  The 
  

   alkali 
  oxide 
  was 
  found 
  to 
  have 
  a 
  molecular 
  weight 
  of 
  almost 
  

   exactly 
  30, 
  which 
  is 
  the 
  molecular 
  weight 
  of 
  Li 
  2 
  0, 
  thus 
  indi- 
  

   cating 
  the 
  purity 
  of 
  the 
  oxide. 
  

  

  * 
  This 
  Journal, 
  III, 
  xlviii, 
  p. 
  31, 
  1894. 
  f 
  Ibid., 
  Ill, 
  xvii, 
  p. 
  226, 
  1879, 
  

  

  