# materialdb - Materials Database¶

 air Empty layer water Description of a solid block of material. H2O Description of a solid block of material. heavywater Description of a solid block of material. D2O Description of a solid block of material. lightheavywater Description of a solid block of material. DHO Description of a solid block of material. silicon Description of a solid block of material. Si Description of a solid block of material. sapphire Description of a solid block of material. Al2O3 Description of a solid block of material. gold Description of a solid block of material. Au Description of a solid block of material. permalloy Description of a solid block of material. Ni8Fe2 Description of a solid block of material.

Common materials in reflectometry experiments along with densities.

By name:

air, water, heavywater, lightheavywater, silicon, sapphire, gold
permalloy


By formula:

H2O, D2O, DHO, Si, Al2O3, Au, Ni8Fe2


If you want to adjust the density you will need to make your own copy of these materials. For example, for permalloy:

>>> NiFe=Material(permalloy.formula,density=permalloy.bulk_density)
>>> NiFe.density.pmp(10)  # Let density vary by 10% from bulk value
Parameter(permalloy density)