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CALIBRATIONFe 3 Al 2 Si 3 O 12 + KMg 3 AlSi 3 O 10 (OH) 2 ↔ Mg 3 Al 2 Si 3 O 12 +KFe 3 AlSi 3 O 10 (OH) 2alm<strong>an</strong>din phlogopite pyrope<strong>an</strong>nite• Ferry et Spear (1978)• Si ∆ r C P ≈ 0 (variation de capacité calorifique)1/3 ln K = ln K D = -2109/T(K) + 0,782• Pour 2,07 kbar (7 km de profondeur),T compris entre550 et 800°C.
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