Summary
Samenvatting - miller indices (Inleiding tot de mineralogie)
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Dit is een samenvatting van het hoofdstuk 'miller indices' uit het vak 'inleiding tot de mineralogie'.
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Miller indicesSymbolen van de kristalvlakken
Kristalpolyeders gekenmerkt door hoeken tussen vlakken
o Tov de kristallografische assenstelsels (referentiesymmetrie)
A, b, c as (herman Moguin notatie)
Kubbisch: eenheidsafstand (a, b, c) = gelijk
o Richtingen vd vlakken tov elkaar
Elementaire vlakken
// vlakken = hetzelfde vlak
Wet van Hauy (wet der rationale indices)
Verhoudingen van assen-eenheden ≠ rationale getallen (coËff van Weiss/Miller wel)
Waarde meestal <6
Symmetrie-assen van kristal enkel 2,3,4,6-tallig zijn
o cos α = rationaal getal
o α = 60°, 90°, 120° en 180°
Positieve en negatieve indices
Minteken boven de index schrijven
kristallografisch assenstelsel in het centrum van de bol
o assenvlakken verdelen bol in octanten
vlakken soms verlengt worden om kristallografische assen te doorsnijden
1) negatieve kristalvlakken
= onderste vlak doorsnijdt de negatieve c-as
OPM! (001) // (001)
2) Andere voorbeelden ppt
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