Volumes and areas calculated from the idealized framework model
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| Occupiable Volume | Å3 | ( | %) | ||||||
| Accessible Volume | Å3 | ( | %) | ||||||
| Occupiable Area | Å2 | ( | m2/g) | ||||||
| Accessible Area | Å2 | ( | m2/g) | ||||||
| Specific Occupiable Area | m2/cm3 | ||||||||
| Specific Accessible Area | m2/cm3 | ||||||||
| Maximum diameter of a sphere: | |||||||||
| that can be included | Å | ||||||||
| that can diffuse along | a: | Å | b: | Å | c: | Å | |||
| Explanations | |||||
| Occupiable volume | That portion of the available volume within the cell that can be visited by the center of a (spherical) water molecule (radius = 1.4Å). The available volume is the unit cell volume remaining after the van der Waals atomic sphere volumes are subtracted. | ||||
| Occupiable area | The area of that surface visited by the center of the water molecule. | ||||
| Accessible volume | That portion of the occupiable volume that has continuity between all unit unit cells. Some pores/cavities have windows that are too small to allow the water molecule access, and so represent isolated occupiable regions. | ||||
| Accessible area | The area of that surface visited by the center of the water molecule. | ||||
| Specific occupiable area | Occupiable area per unit volume | ||||
| Specific accessible area | Accessible area per unit volume | ||||
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