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Led

Led je smrznuta voda, čvrsto stanje H2O, u normalnim uvjetima na površini Zemlje smatra se mineralom (dok voda – H2O u tekućem stanju nije mineral), ledište / talište ovisi o tlaku i iznosi 0 stupnjeva Celzijeve temperaturne skale.

Svojstva leda:

  • Sustav: Heksagonalni
  • Tvrdoća (Mohsova ljestvica) 1 ½
  • Boja: bezbojna do bijela, blijedoplava do zelenkasto-plava u debelim slojevima
  • Linija: bijela
  • Prijelom: konkoidalan
  • Sjaj: staklast
  • Gustoća od 0,9167 g/cm3 (izmjerena), 0,93 g/cm3 (izračunata) – slika 3.
  • Dijamagnetičan

Vrste leda:

  • snijeg, snježne pahuljice
  • ledene kuglice, tuča
  • ledenjački led
  • inje
  • morski led
  • vodeni led

U uvjetima koji nisu normalni na površini Zemlje (u svemiru, u laboratoriju) postoji nekoliko ledenih kristalografskih inačica, koje pokazuju osobitosti fizičkih svojstava.

Slika: dijagram faza vode, Garrison 1991

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