P - Glossary

Paired tetrahedral sillicates

Paragenesis

Parallel extinction

Paramagnetism

Parent isotope

Partial crystallization

Partial melting

Parting

Pauling’s rules

Pearly luster

Pedion

Pegmatite

Pelite

Penetration twin

Pericline twin

Peridotite

Period (of elements)

Periodic chart

Petrogenesis

Petrographic microsocpe

Petrography

Phaneritic

Phase diagram

Phase rule

Phenocryst

Phosphate (mineral)

Phosphate (radical)

Phosphorescence

Phosphorite

Phyllite

Phyllosilicates

Piezoelectric

Pinacoid

Pipe

Pisolitic

Placer

Planck’s law

Plane defect

Plane lattice

Plane polarized

Plaster of paris

Platy (cleavage)

Platy (crystal)

Play of color

Pleochroism

Plumose

Plutonic rock

Point defect

Point group

Point symmetry

Polarized (ion)

Polarized (wave)

Polarizing light microscope

Pole

Polychromatic

Polyhedron

Polymer

Polymerization

Polymorphs

Polysynthetic twinning

Porphyritic

Porphyroblast

Porphyry (igneous rock)

Porphyry (ore deposit)

Portland cement

Powder diffraction

Powder Diffraction file (PDF)

Precambrian shield

Precious metals

Precipitate

Prehnite-pumpellyite (facies)

Primary mineral

Primitive

Principal axis

Principle of parsimony (Pauling’s fifth rule)

Prism

Prismatic (cleavage)

Prismatic (crystal)

Prograde metamorphism

Prograde reactions

Progressive metamorphism

Proper rotation axis

Prorcelain

Proton

Psammite

Pseudohexagonal

Pseudosymmetry

Pycnometer

Pyralspite

Pyramid

Pyramid cleavage

Pyritohedron

Pyroelectric

Pyroxene quadrilateral

Pyroxene-hornfels (facies)

Pyroxenite

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