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hornblende

more about hornblende

hornblende


  3  definitions  found 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Amphibole  \Am"phi*bole\  ([a^]m"f[i^]*b[=o]l),  n.  [Gr. 
  'amfi`bolos  doubtful,  equivocal,  fr  'amfiba`llein  to  throw 
  round,  to  doubt:  cf  F.  amphibole.  Ha["u]y  so  named  the  genus 
  from  the  great  variety  of  color  and  composition  assumed  by 
  the  mineral.]  (Min.) 
  A  common  mineral  embracing  many  varieties  varying  in  color 
  and  in  composition.  It  occurs  in  monoclinic  crystals;  also 
  massive,  generally  with  fibrous  or  columnar  structure.  The 
  color  varies  from  white  to  gray,  green,  brown,  and  black.  It 
  is  a  silicate  of  magnesium  and  calcium,  with  usually 
  aluminium  and  iron.  Some  common  varieties  are  {tremolite}, 
  {actinolite},  {asbestus},  {edenite},  {hornblende}  (the  last 
  name  being  also  used  as  a  general  term  for  the  whole 
  species).  Amphibole  is  a  constituent  of  many  crystalline 
  rocks,  as  syenite,  diorite,  most  varieties  of  trachyte,  etc 
  See  {Hornblende}. 
 
  From  Webster's  Revised  Unabridged  Dictionary  (1913)  [web1913]: 
 
  Hornblende  \Horn"blende`\,  n.  [G.,  fr  horn  horn  +  blende 
  blende.]  (Min.) 
  The  common  black,  or  dark  green  or  brown,  variety  of 
  amphibole.  (See  {Amphibole}.)  It  belongs  to  the  aluminous 
  division  of  the  species,  and  is  also  characterized  by  its 
  containing  considerable  iron.  Also  used  as  a  general  term  to 
  include  the  whole  species. 
 
  {Hornblende  schist}  (Geol.),  a  hornblende  rock  of  schistose 
  structure. 
 
  From  WordNet  r  1.6  [wn]: 
 
  hornblende 
  n  :  a  green  to  black  mineral  of  the  amphibole  group  consists  of 
  silicates  of  calcium  and  sodium  and  magnesium  and  iron 




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