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Diagrama Flujo Identificación de Minerales Arcillosos Por XRD
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Transcript of Diagrama Flujo Identificación de Minerales Arcillosos Por XRD
Electron micrographif required
Randomly-orientedaggregate mount of clay
fraction (<2 m) Results
12-12.5No change Destroyed
Destroyed or reducedin intensity
Check hkl’sagainst standard
Fibrous morphology Sepiolite
Increases in intensity~14
No change No change
Expands to 17
Collapses to ~10
060 near 1.54
060 near 1.54
060 near 1.50
060 near 1.54
060 near 1.50
060 near 1.50
060 near 1.52
Collapses to ~10
Additional collapsesto ~11Slight collapse to ~12
Collapses to ~10with very weak 5 peak
Chlorite
Dioctahedral chlorite
Vermiculite
Dioctahedral vermiculite
Montmorillonite
Nontronite
Trioctahedral montmorillonite or vermiculite
No change or slightadditional collapse
No change or slightadditional collapse
No change or slightadditional collapse
No change orslight increase
No change - Irrational sequence
No change
No change
060 near 1.54
060 near 1.54
060 near 1.54
060 near 1.54
Collapses to ~10
Collapses to ~10
No change or slightincrease in intensity
Collapses to 10
Collapses to 10
No change or slightincrease in intensity
No change - Rational sequence of
higher orders.
Regularly interstratifiedillite-vermiculite
Regularly interstratifiedillite-chlorite
Randomly interstratifiedillite-vermiculite
Randomly interstratifiedillite-chlorite
No change 060 near 1.50Slight collapse Further collapseInterstratified dioctahedral
illite-vermiculite
060 near 1.54
060 near 1.50Collapses to ~10 Collapses to 10Expands to
higher spacingInterstratified
illite-montmorillonite
Interstratified trioctahedralillite-montmorillonite
>10-14
Air Dried
~29Expands to 31-32 with
rational sequence of higher orders
May disappear orgive 24 spacing
May give irrationalsequence
Increases in intensityof 24 spacing
May give irrational sequences-- may show increase in intensity
of 12-14 peak
Regularly interstratified chlorite-montmorillonite or chlorite-
vermiculite (corrensite)
Randomly interstratified chlorite-montmorillonite
Expandsbut gives irrational sequence
Peaks may be broad
Treated with ethylene glycol
oHeated to 400 C at least ½ hour
oHeated to 550 C at least ½ hour
X-rays of Oriented Aggregates
060 near 1.50
060 near 1.54
DioctahedralChlorite
Chlorite
7No change No change No change Fibrous morphology
Check hkl’sagainst standard
Check hkl’sagainst standard
Platy morphology
Chrysotile
Antigorite
Destroyed060 near 1.49
hk bands presentmoderately broad 001’s
Platy morphology
Disordered kaolinite(Fireclay)
hkl’s resolvedHexagonal morphologyKaolinite
Dickite
Nacrite
Increase in spacingor no change
DestroyedCollapses to 7 Tubular morphology 060 near 1.49hk bands present
Halloysite
Clay Mineral Identification Flow Diagram
~10 SymmetricalNo change No change No change
060 near 1.54
060 between1.51 - 1.525 peak very
060 between1.51 - 1.525 peak very
Illite (and/or mica),muscovitic,
various polymorphs
Biotitevarious polymorphs
Glauconite orCeladonite
(Roscoelite if V bearing)
Expands to ~11
Unsymmetrical orslight shift either way
No change orslight sharpening
Destroyed 060 near 1.49
060 variable
Tubular morphology Endellite
Interstratifiedillite-montmorillonite or
illite-vermiculite(Illite)
Collapses to ~7
Palygorskite10.5No change Destroyed
Destroyed - - maysurvive slightly at
lower temperature
Check hkl’sagainst standard
Fibrous morphology