﻿Geology 
  and 
  Mineralogy. 
  433 
  

  

  7. 
  Brief 
  notices 
  of 
  some 
  recently 
  described 
  minerals. 
  — 
  Brand- 
  

   tite. 
  A 
  hydrous 
  arsenate 
  of 
  manganese 
  and 
  calcium, 
  formula 
  

   Ca 
  2 
  MnAs 
  2 
  8 
  + 
  2H 
  2 
  0, 
  found 
  at 
  the 
  Harstig 
  mine, 
  near 
  Pajsberg, 
  

   Sweden. 
  It 
  is 
  analogous 
  to 
  roselite 
  and 
  fairfieldite 
  in 
  composition 
  

   and 
  closely 
  similar 
  to 
  the 
  former 
  species 
  in 
  its 
  triclinic 
  crystals. 
  

   The 
  color 
  is 
  white 
  with 
  vitreous 
  luster, 
  hardness 
  =5-5*5 
  ; 
  sp. 
  

   gravity 
  =3 
  -6 
  71. 
  An 
  analysis 
  gave 
  : 
  

  

  As 
  2 
  O 
  s 
  P 
  2 
  5 
  MnO 
  CaO 
  PbO 
  FeO 
  MgO 
  CI 
  H 
  2 
  insol. 
  

   50-48 
  0-05 
  14-03 
  25-07 
  0*96 
  0-05 
  090 
  0-04 
  8-09 
  004 
  = 
  99*71 
  

  

  Named 
  by 
  Nordenskiold 
  and 
  later 
  described 
  by 
  Lindstrom. 
  — 
  G. 
  

   For. 
  Fork., 
  xiii, 
  123, 
  1891. 
  

  

  Ganophyllite. 
  — 
  A 
  hydrous 
  silicate 
  of 
  alumina 
  and 
  manganese 
  

   from 
  the 
  Harstig 
  mine, 
  Sweden. 
  It 
  occurs 
  in 
  monoclinic 
  crys- 
  

   tals 
  with 
  perfect 
  basal 
  cleavage. 
  The 
  color 
  is 
  brown 
  ; 
  hardness 
  

   =4-4*5 
  ; 
  sp. 
  grav. 
  =2*84. 
  An 
  analysis 
  gave 
  : 
  

   Si0 
  2 
  Al 
  a 
  O 
  s 
  Fe 
  2 
  3 
  MnO 
  CaO 
  MgO 
  PbO? 
  K 
  2 
  Na 
  2 
  H 
  2 
  

   39-67 
  7-95 
  0-90 
  3515 
  I'll 
  0-20 
  0*20 
  2*70 
  2-18 
  9*79 
  = 
  99-85 
  

  

  The 
  formula 
  calculated 
  is 
  7 
  MnO 
  . 
  A1 
  2 
  3 
  . 
  8Si0 
  2 
  . 
  6H 
  2 
  ; 
  the 
  author, 
  

   A. 
  Hamberg, 
  proposes 
  to 
  include 
  it 
  among 
  the 
  zeolites. 
  — 
  G. 
  For. 
  

   Forh., 
  xii, 
  586, 
  1890. 
  

  

  Pyrophantte. 
  — 
  A 
  manganese 
  titanate, 
  MnTi0 
  3 
  , 
  like 
  the 
  pre- 
  

   ceding 
  species 
  from 
  the 
  Harstig 
  mine. 
  It 
  occurs 
  in 
  rjiombohe- 
  

   dral 
  crystals 
  isomorphous 
  with 
  hematite 
  and 
  ilmenite 
  and 
  is 
  

   probably 
  tetartohedral 
  like 
  the 
  latter 
  species. 
  The 
  color 
  is 
  deep 
  

   blood-red 
  ; 
  hardness 
  =5 
  ; 
  sp. 
  grav. 
  =4*53'7. 
  An 
  analysis 
  gave 
  : 
  

   Ti0 
  2 
  50-49 
  MnO 
  46-92 
  Fe 
  2 
  3 
  1*16 
  Sb 
  2 
  3 
  0-48 
  Si0 
  2 
  1-58 
  = 
  100*63 
  

   Also 
  described 
  by 
  Hamberg, 
  ibid. 
  

  

  Offrettte. 
  — 
  A 
  new 
  zeolite 
  near 
  phillipsite 
  in 
  composition, 
  

   from 
  Mt. 
  Simionse, 
  Montbrison, 
  France. 
  It 
  occurs 
  in 
  white 
  

   hexagonal 
  crystals 
  with 
  sp. 
  grav. 
  =2*13. 
  An 
  analysis 
  gave 
  : 
  

   Si0 
  2 
  5247 
  A1 
  2 
  3 
  19*06 
  CaO 
  2*43 
  K 
  2 
  7-72 
  H 
  2 
  18-90 
  = 
  100*58 
  

  

  Described 
  by 
  F. 
  Gonnard, 
  C. 
  B., 
  cxi, 
  1002, 
  1890. 
  

  

  Kalltlite. 
  — 
  A 
  nickel 
  ore 
  from 
  the 
  Friedrich 
  mine 
  near 
  Schon- 
  

   stein 
  a. 
  d. 
  Sieg. 
  It 
  occurs 
  in 
  massive 
  form 
  with 
  a 
  light 
  bluish 
  

   gray 
  color. 
  Analysis 
  gave 
  : 
  

  

  S 
  Sb 
  As 
  Bi 
  Ni 
  Fe 
  Co 
  

  

  14-39 
  44*94 
  2*02 
  11-76 
  26*94 
  0'27 
  089 
  = 
  101*21 
  

  

  This 
  corresponds 
  essentially 
  to 
  NiSbS. 
  ' 
  Described 
  by 
  Laspeyres, 
  

   Zs. 
  Fry 
  st, 
  xix, 
  12, 
  1891. 
  

  

  Sychnodymite. 
  — 
  A 
  cobalt 
  ore 
  also 
  described 
  by 
  Laspeyres 
  

   (1. 
  c, 
  p. 
  17) 
  from 
  the 
  Kohlenbach 
  mine 
  at 
  Eiserfeld 
  near 
  Siegen. 
  

   It 
  occurs 
  in 
  isometric 
  crystals 
  of 
  a 
  dark 
  steel-gray 
  color. 
  Analy- 
  

   sis 
  gave 
  : 
  

  

  S 
  40-33 
  Cu 
  17*23 
  Co 
  35-64 
  Ni 
  5*74 
  Fe 
  0*82 
  = 
  99-76 
  

  

  This 
  corresponds 
  to 
  (Co, 
  Cu, 
  Ni) 
  4 
  S 
  5 
  , 
  like 
  polydymite. 
  

  

  Umangite. 
  — 
  A 
  selenide 
  of 
  copper 
  occurring 
  with 
  eucairite 
  in 
  

   the 
  Sierra 
  de 
  Umango, 
  Argentine 
  Republic. 
  It 
  occurs 
  in 
  fine 
  

   granular 
  massive 
  forms, 
  with 
  metallic 
  luster, 
  dark 
  cherry-red 
  

   color; 
  hardness 
  =3 
  ; 
  sp. 
  grav. 
  =5*620. 
  Analysis 
  gave: 
  

  

  