﻿452 
  Scientific 
  Intelligence. 
  

  

  of 
  its 
  platinum 
  production 
  of 
  the 
  districts 
  in 
  the 
  Ural 
  Mts. 
  

   There 
  are 
  two 
  dunite 
  areas 
  immediately 
  in 
  the 
  region 
  and 
  a 
  third 
  

   contributory 
  to 
  it. 
  From 
  these 
  three 
  centers 
  the 
  platinum 
  has 
  

   been 
  distributed 
  to 
  the 
  gravels 
  of 
  the 
  rivers 
  of 
  the 
  area. 
  

  

  w. 
  E. 
  F. 
  

  

  6. 
  New 
  Mineral 
  Names; 
  by 
  AY. 
  E. 
  Ford 
  (communicated 
  — 
  

   continued 
  from 
  vol. 
  47, 
  pp. 
  446-448, 
  June, 
  1919) 
  :— 
  

  

  Backstromite. 
  G. 
  Aminoff. 
  Geol. 
  For. 
  Fork., 
  41, 
  473, 
  1919. 
  

   Orthorhombic. 
  a:b:c 
  = 
  0-7393 
  : 
  1 
  : 
  0-6918. 
  In 
  small 
  pris- 
  

   matic 
  crystals 
  or 
  in 
  larger 
  crystals 
  without 
  terminations. 
  Fre- 
  

   quently 
  in 
  oriented 
  intergrowths 
  with 
  crystals 
  of 
  pyrochroite, 
  

   so 
  that 
  the 
  base 
  (0001) 
  of 
  the 
  latter 
  is 
  parallel 
  to 
  (010) 
  of 
  

   backstromite. 
  Comp. 
  — 
  Mn(OH) 
  2 
  . 
  From 
  X-ray 
  pictures 
  it 
  is 
  

   thought 
  that 
  the 
  backstromite 
  has 
  undergone 
  a 
  molecular 
  change 
  

   to 
  the 
  structure 
  of 
  pyrochroite. 
  It 
  has 
  also 
  frequently 
  further 
  

   altered 
  to 
  manganite. 
  From 
  Langbanshyttan, 
  Sweden. 
  Named 
  

   after 
  Helge 
  Backstrom. 
  

  

  Bismutoplagionite. 
  E. 
  V. 
  Shannon. 
  This 
  Journal, 
  49, 
  166, 
  

   1920. 
  A 
  plagionite-like 
  mineral 
  containing 
  chiefly 
  bismuth 
  

   instead 
  of 
  antimony, 
  5PbS-4Bi 
  2 
  S 
  3 
  . 
  From 
  Wickes, 
  Jefferson 
  Co., 
  

   Montana. 
  

  

  Cocinerite. 
  G. 
  J. 
  Hough, 
  this 
  Journal, 
  48, 
  206, 
  1919. 
  Mas- 
  

   sive. 
  Color, 
  silver-gray, 
  slowly 
  tarnishing 
  to 
  black. 
  Streak, 
  

   lead-gray. 
  H 
  = 
  2-5. 
  G. 
  = 
  6- 
  14. 
  Comp. 
  — 
  Cu 
  4 
  AgS. 
  Found 
  in 
  

   1901 
  in 
  the 
  Cocinera 
  mine 
  of 
  the 
  Mexican 
  Copper 
  Co., 
  at 
  Ramos, 
  

   San 
  Luis 
  Potosi, 
  Mexico. 
  

  

  Echellite. 
  N. 
  L. 
  Bowen. 
  Amer. 
  Min. 
  5, 
  1, 
  1920. 
  Prob- 
  

   ably 
  orthorhombic. 
  Fibrous, 
  in 
  radiating 
  spheroidal 
  masses 
  up 
  

   to 
  1 
  cm. 
  in 
  diameter. 
  H. 
  = 
  5. 
  Color 
  white, 
  a 
  = 
  1-530: 
  

   /? 
  = 
  1-533 
  ; 
  y 
  = 
  1-545 
  ; 
  2V 
  = 
  50°. 
  Fibers 
  elongated 
  parallel 
  to 
  

   Y. 
  Comp.— 
  (Ca,Na 
  2 
  )0-2Al 
  2 
  3 
  -3Si0 
  2 
  -4H 
  2 
  0. 
  From 
  a 
  basic 
  

   intrusive, 
  found 
  at 
  Sextant 
  Portage, 
  Abitibi 
  River, 
  Northern 
  

   Ontario. 
  Named 
  from 
  the 
  French 
  echelle, 
  ladder, 
  in 
  allusion 
  to 
  

   the 
  stepped 
  character 
  of 
  the 
  molecular 
  ratios. 
  

  

  Ferrazite. 
  T. 
  H. 
  Lee 
  and 
  Lutz 
  Flores 
  de 
  Moraes, 
  this 
  Jour- 
  

   nal, 
  48, 
  353, 
  1919. 
  A 
  so-called 
  "fava" 
  found 
  associated 
  with 
  

   diamond 
  from 
  Brazil. 
  Color, 
  dark 
  yellowish 
  white. 
  Gr.= 
  30- 
  

   3-3. 
  Comp.— 
  3(Ba,Pb)0-2P 
  2 
  5 
  -8H 
  2 
  0. 
  Named 
  after 
  Dr. 
  Jorge 
  

   Belmiro 
  de 
  Araujo 
  Ferraz. 
  

  

  Gavite. 
  Emilio 
  Repossi, 
  [Att. 
  Soc. 
  Ital. 
  Sci. 
  Nat., 
  57, 
  131-155, 
  

   1918], 
  Amer. 
  Min., 
  4, 
  132, 
  1919. 
  Apparently 
  a 
  variety 
  of 
  talc, 
  

   said 
  to 
  differ 
  from 
  that 
  mineral 
  in 
  the 
  amount 
  of 
  water 
  present 
  

   and 
  in 
  its 
  solubility 
  in 
  acids. 
  Found 
  in 
  the 
  Gava 
  valley, 
  Italy. 
  

  

  Manganfayalite. 
  John 
  Palmgren, 
  [Bull. 
  Geol. 
  Inst. 
  Univ. 
  

   Upsala, 
  14, 
  109-278, 
  1917], 
  Chem. 
  Abs., 
  13, 
  1197, 
  1919. 
  Name 
  

   given 
  to 
  a 
  manganese-rich 
  fayalite 
  found 
  in 
  a 
  eulysite 
  rock 
  from 
  

   Sodermanland, 
  Sweden. 
  

  

  Oruetite. 
  S. 
  Pina 
  de 
  Rubies, 
  [Anal. 
  soc. 
  espan. 
  fis. 
  quim., 
  17, 
  

  

  