﻿Geology 
  and 
  Mineralogy. 
  469 
  

  

  the 
  prismatic 
  zone 
  being 
  highly 
  developed. 
  A 
  qualitative 
  analy- 
  

   ■sis 
  showed 
  the 
  mineral 
  to 
  be 
  a 
  lead 
  oxychloride, 
  but 
  the 
  material 
  

   was 
  too 
  scanty 
  to 
  allow 
  of 
  an 
  analysis. 
  Locality, 
  the 
  San 
  Rafael 
  

   mine, 
  Sierra 
  Gorda, 
  Chili.* 
  

  

  The 
  same 
  authors 
  also 
  give 
  a 
  new 
  examination 
  of 
  utabite 
  in 
  

   distinct 
  crystals; 
  the 
  formula 
  deduced 
  is 
  Fe203.S03.22H^O. 
  They 
  

   further 
  describe 
  a 
  basic 
  bismuth 
  carbonate 
  from 
  Schneeberg 
  

   which 
  seems 
  to 
  be 
  new, 
  having 
  the 
  composition, 
  SBi^Og.H^O.CO,. 
  

  

  LoRANSKiTE 
  is 
  a 
  new 
  tantalate 
  first 
  investigated 
  by 
  M. 
  Melni- 
  

   kow 
  and 
  named 
  by 
  him 
  after 
  A. 
  Loranski. 
  It 
  (occurs 
  at 
  Imbilax 
  

   near 
  Pikaranta, 
  Finland, 
  in 
  massive 
  form 
  in 
  quartz 
  veins. 
  It 
  is 
  

   optically 
  isotropic 
  with 
  conchoidal 
  fracture 
  ; 
  hardness 
  about 
  5 
  and 
  

   specific 
  gravity 
  nearly 
  4-6 
  ; 
  color 
  black 
  and 
  streak 
  greenish 
  gray. 
  

   An 
  analysis 
  by 
  P. 
  Nikolajew 
  gave 
  : 
  

  

  Ta205 
  ZrOs 
  Y2O3 
  FegOa 
  CeO 
  CaO 
  Jgn. 
  

   G.=4-162 
  47-0 
  20-0 
  lO'O 
  4-0 
  3-0 
  3-3 
  815 
  =95--J5 
  

  

  A 
  small 
  amount 
  of 
  sulphur 
  and 
  traces 
  of 
  titanium 
  and 
  manga- 
  

   nese 
  were 
  not 
  determined. 
  — 
  Zeitschr. 
  f. 
  Kryst., 
  xxxi, 
  505. 
  

  

  Stokesite. 
  This 
  new 
  mineral, 
  named 
  in 
  honor 
  of 
  the 
  dis- 
  

   tinguished 
  physicist, 
  Sir 
  George 
  G. 
  Stokes, 
  is 
  described 
  by 
  A. 
  

   Hutchinson 
  from 
  a 
  single 
  crystal 
  in 
  the 
  Cambridge 
  Mineralogical 
  

   Museum. 
  The 
  crystal 
  is 
  lO"""' 
  in 
  length 
  and 
  belongs 
  to 
  the 
  ortho- 
  

   rhombic 
  system; 
  it 
  shows 
  the 
  forms 
  h 
  (010) 
  and 
  v 
  (121), 
  Cleav- 
  

   age 
  is 
  perfect 
  parallel 
  to 
  b 
  and 
  also 
  good 
  parallel 
  to 
  a 
  prism 
  

   taken 
  as 
  110. 
  The 
  axial 
  ratio 
  deduced 
  i^ 
  ti: 
  b 
  :c 
  = 
  0-34'79: 
  1 
  : 
  

   0-8117 
  (the 
  author 
  gives 
  no 
  angles). 
  The 
  physical 
  characters 
  are 
  

   as 
  follows 
  : 
  fracture 
  conchoidal 
  ; 
  hardness 
  about 
  6 
  to 
  6*5; 
  specific 
  

   gravity 
  3'185; 
  luster 
  vitreous, 
  but 
  pearly 
  on 
  5; 
  colorless 
  ; 
  opti- 
  

   cally 
  positive 
  with 
  the 
  axial 
  plane 
  parallel 
  to 
  b 
  and 
  the 
  bisectrix 
  

   normal 
  to 
  001. 
  

  

  A 
  partial 
  chemical 
  examination 
  has 
  led 
  to 
  the 
  conclusion 
  that 
  it 
  

   is 
  a 
  hydrated 
  silicate 
  of 
  sodium 
  and 
  calcium 
  with 
  about 
  6 
  p. 
  c. 
  of 
  

   tin 
  dioxide 
  supposed 
  to 
  replace 
  part 
  of 
  the 
  silica. 
  — 
  Phil. 
  3Iag., 
  

   November, 
  1899, 
  p. 
  480. 
  

  

  Von 
  Diestite. 
  JM. 
  Cumenge 
  has 
  recently 
  described 
  (Bull. 
  

   Soc. 
  Min., 
  xxii, 
  25, 
  1896) 
  a 
  telluride 
  of 
  silver 
  and 
  bismuth 
  from 
  

   Colorado, 
  discovered 
  by 
  the 
  mining 
  director 
  Von 
  Diest. 
  It 
  

   occurs 
  in 
  veins 
  with 
  copper 
  minerals 
  and 
  auriferous 
  pyrite 
  in 
  the 
  

   Hamilton 
  and 
  Little 
  Gerald 
  mines 
  on 
  the 
  slopes 
  of 
  the 
  Sierra 
  

   Blauca. 
  An 
  analyt^is 
  by 
  Knight 
  has 
  given 
  the 
  following 
  results 
  : 
  

   Te 
  Bi 
  Ag 
  All 
  Pb 
  S 
  insol. 
  

  

  34-60 
  16-31 
  40-25 
  4-30 
  2-25 
  54 
  0-54 
  = 
  98-79 
  

  

  10. 
  A 
  Preliininary 
  Report 
  on 
  a 
  Part 
  of 
  the 
  Clays 
  of 
  Georgia; 
  

   by 
  George 
  E. 
  Ladd, 
  Assistant 
  Geologist. 
  Bulletin 
  No. 
  6-A, 
  

   Geological 
  Survey 
  of 
  Georgia. 
  W. 
  S. 
  Yeates, 
  State 
  Geologist. 
  

   Atlanta, 
  Georgia, 
  1898. 
  — 
  The 
  latest 
  addition 
  to 
  the 
  valuable 
  series 
  

  

  * 
  In 
  the 
  October 
  number 
  of 
  the 
  Mineralogical 
  Magazirte^ 
  received 
  after 
  the 
  above 
  

   was 
  in 
  type, 
  it 
  is 
  shown 
  by 
  G. 
  F. 
  Herbert 
  Smith 
  that 
  rafaelite 
  is 
  identical 
  with 
  

   paralaurioDite 
  (ibid., 
  April 
  1899). 
  

  

  