Phlogopite compressibility

Tensile strength compression strength for muscovite and phlogopite is 221 MPa. To convert MPa to psi, multiply by 145. Chemically combined. 

Y.-S. Chou and J.W. Stevenson, Phlogopite Mica-Based Compressive Seals for Solid Oxide Fuel Cells Effect of Mica Thickness, Journal of Power Sources, 124, pp. 473 178 (2003). 

Hazen RM, Finger LW (1978) The crystal stractures and compressibilities of layer minerals at high pressure. 11. Phlogopite and chlorite. Am Mineral 63 293-296 Hazen RM, Finger LW, Velde D (1981) Crystal stracture of a sihca- and alkali-rich trioctahedral mica. Am Mineral 66 586-591... 

In Table 3, the compressibility of the lattice parameters and of the polyhedral building units are reported, along with other structural parameters useful to understand the high-pressure behavior of Cs-annite, Rb-annite and phlogopite. The points outlined below show the effect of how different structural units of trioctahedral micas relate with one another, and then respond as a whole to pressure ... 

Chou, Y.S. and Stevenson, J.W. (2004) Novel infiltrated phlogopite mica compressive seals for solid oxide fuel cells. J. Power Sources, 135, 72-78. 

Compressive gaskets for high temperature applications are usually made of either vermiculite, phlogopite mica or muscovite mica. Exfoliation results in highly compliant structures made of crystal platelets or fine particles. The CTE of such materials is likely very complex and its measurement challenging. Depending on the manufacturing process, an orthotropic behaviour is expected. The scarce available data indicates that it lies within 10—14 x 10 between RT and 1073 K [34]. 

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