Al2O3-SiO2
New end-members in this subsystem are hydroxy-topaz and kaolinite. Hydroxy-topaz data are derived from the experiments of Wunder et al. (1993) on the reaction tpz = ky + H2O, while kaolinite data are derived using the experimental data of Hemley et al. (1980) and McPhail (in Berman, 1988). It was decided to use the experimental data of Holdaway, (1971), Bowman (1975), Kerrick & Heninger (1985) and Weill (1966) for the and = sill reaction. Previously in HP90 all experiments on and = sill were left out of the regression, because of the difficulty in deciding which sets of experiments to choose. Thermodynamic data for kyanite and andalusite now also fit the tightly constraining experiments of Harlov & Newton (1993) on cor + q = ky and the cor + q = and equilibria very successfully. Diaspore-corundum experiments of Vidal et al. (1994) and Grevel et al. (1994) on the reaction 2dsp = cor + H2O are now used, as are also the brackets of Theye et al. (1997) on the reactions 2dsp + 4q = prl and 2dsp + 4coe = prl.
66) ky = and (Holdaway, 1971; Newton, 1966a; Richardson et al., 1969; Bohlen et al 1991)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 2.4 377 409 4.24 4.54 390 12 3 (4.22 <-> 4.42)
0 - 3.6 447 499 3.99 4.47 487 12 cH = 4.36 (sd 0.05)
0 - 4.8 557 590 4.10 4.40 585 12 within bracket
0 - 7.0 5.6 700 3.75 4.79 6.18 0.15 uH = 0.07, d/s = 1.1, h = 0.50
0 - 7.5 5.6 750 3.82 5.23 6.77 0.15
0 - 7.9 6.5 800 3.96 5.00 7.36 0.15
0 - 8.5 6.9 800 3.51 4.70 7.36 0.15
0 - 6.8 6.0 700 3.86 4.49 6.18 0.15
0 - 7.9 7.2 825 4.18 4.66 7.66 0.15
0 - 8.2 800 3.73 871 12
67) ky = sill (Newton, 1966b; Richardson et al., 1969; Holdaway, 1971; Bohlen et al., 1991)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 7.0 5.5 600 6.60 7.43 5.85 0.23 3 (7.27 <-> 7.57)
0 - 8.8 7.0 700 6.81 7.80 8.02 0.23 cH = 7.24 (sd 0.06)
0 - 10.3 9.0 800 7.19 7.90 10.22 0.23 too low but OK
0 - 12.2 11.3 900 7.38 7.86 0.26 12.46 0.23 uH = 0.11, d/s = 0.3, h = 0.24
0 - 15.1 13.9 1000 7.05 7.68 14.74 0.24
0 - 9.5 7.5 750 7.03 8.12 9.11 0.23
0 - 9.0 7.2 750 7.30 8.28 0.11 9.11 0.23
0 - 8.2 685 6.96 708 10
0 - 7.0 710 7.92 653 10
0 - 9.2 740 7.07 754 10
0 - 8.8 785 7.83 736 10
0 - 10.2 790 7.13 799 10
0 - 9.8 835 7.88 781 10
0 - 28.0 26.5 1500 6.80 7.53 27.10 0.26
0 - 23.5 1300 6.45 1362 10
68) and = sill (Holdaway, 1971; Bowman 1975; Kerrick & Heninger, 1984)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 1.8 571 663 2.69 2.94 642 28 1 (2.81 <-> 2.89)
0 - 3.6 491 527 2.80 2.90 520 28 cH = 2.88 (sd 0.04)
0 - 3.0 497 2.71 559 28 within bracket
0 - 4.3 506 2.97 475 26 uH = 0.02, d/s = 2.6, h = 0.85
0 - 1.2 2.5 615 2.69 2.94 2.19 0.38
0 - 0.5 669 806 2.70 3.06 738 30
0 - 3.0 607 3.01 559 28
0 - 0.0 805 2.96 776 30
* and = sill (Richardson et al., 1969)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 2.0 750 800 3.21 3.35 -122 628 28 ** NOT USED **
0 - 3.0 650 750 3.13 3.41 -91 559 28 cH = 2.88 (sd 0.04)
0 - 4.0 650 3.32 -156 494 26
69) ky = cor + q (Harlov & Newton, 1993)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 5.5 4.8 700 6.90 7.24 5.17 0.30 2 (6.88 <-> 7.09)
0 - 8.0 7.5 800 6.84 7.07 7.53 0.31 cH = 7.06 (sd 0.06)
within bracket
uH = 0.08, d/s = 1.0, h = 0.33
70) cor + q = and (Harlov & Newton, 1993)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 8.0 7.5 700 -2.76 -2.61 7.79 0.19 1 (-2.76 <-> -2.62)
cH = -2.70 (sd 0.04) 0.5
within bracket
uH = 0.05, d/s = 1.6, h = 0.84
71) 2dsp = cor + H2O (Haas, 1972; Hemley et al., 1980; Grevel et al., 1994)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 1.0 382 406 82.56 84.27 -11 371 4 5 (80.97 <-> 82.31)
0 0 1.8 385 410 81.77 83.54 385 4 cH = 81.80 (sd 0.18)
0 0 2.4 392 415 81.46 83.11 397 4 within bracket
0 0 3.5 410 430 81.51 83.02 414 4 uH = 0.37, d/s = -1.8, h = 0.56
0 0 4.8 415 440 80.62 82.47 431 4
0 0 7.0 450 470 81.28 82.73 457 4
0 0 14.5 500 530 79.60 81.63 3 533 6
0 0 24.0 575 600 79.60 81.20 9 609 6
0 0 28.5 625 650 80.81 82.37 641 6
0 0 38.0 670 700 80.03 81.84 699 6
0 0 47.5 700 740 78.92 81.28 9 749 8
72) 2dsp = cor + H2O (Vidal et al., 1994)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
-0.05 0 25.0 595 615 80.80 82.08 611 6 1 (80.85 <-> 82.03)
-0.05 0 28.0 615 650 80.77 82.97 631 6 cH = 81.80 (sd 0.18)
within bracket
uH = 0.42, d/s = 1.5, h = 0.10
73) prl + 6dsp = 4and + 4H2O (Haas & Holdaway, 1973; Hemley et al., 1980)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 1.0 325 349 309.46 316.62 343 4 3 (309.49 <-> 313.67)
0 0 2.4 340 400 305.82 321.97 373 4 cH = 314.94 (sd 0.72) 2
0 0 3.5 365 395 307.05 314.74 1 396 4 too high but OK
0 0 4.8 395 415 308.32 313.70 4 419 4 uH = 1.50, d/s = 1.4, h = 0.06
0 0 7.0 435 455 309.29 314.93 455 6
74) 2dsp + 4q = prl (Theye et al., 1997)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 25.0 500 535 1.31 1.48 533 26 2 (1.42 <-> 1.56)
0 - 23.0 500 540 1.49 1.69 -5 495 24 cH = 1.47 (sd 0.06)
within bracket
uH = 0.05, d/s = -0.2, h = 0.97
75) 2dsp + 4coe = prl (Theye et al., 1997)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 - 28.3 26.0 550 -20.67 -18.63 27.53 0.47 1 (-20.49 <-> -18.82)
cH = -19.99 (sd 0.21)
within bracket
uH = 0.48, d/s = 2.1, h = 0.05
76) prl = cor + 4q + H2O (Chatterjee et al., 1984)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 3.0 400 460 78.54 82.86 425 6 1 (80.12 <-> 82.20)
0 0 5.0 440 500 79.48 83.69 452 6 cH = 80.33 (sd 0.18)
0 0 7.0 460 520 79.26 83.33 476 6 within bracket
0 0 10.0 500 540 79.85 82.47 507 6 uH = 0.35, d/s = 3.7, h = 0.05
77) prl = and + 3q + H2O (Hemley et al., 1980; Kerrick, 1968)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 1.0 354 378 77.52 79.15 356 4 3 (78.41 <-> 79.29)
0 0 1.8 395 425 78.96 81.08 -22 373 4 cH = 77.63 (sd 0.19)
0 0 3.9 415 445 77.47 79.57 417 4 too low
uH = 0.32, d/s = 0.3, h = 0.14
78) prl = and + 3q + H2O (Haas & Holdaway, 1973)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 3.5 390 415 76.38 77.97 410 4 1 (76.43 <-> 77.38)
0 0 4.8 410 430 76.07 77.43 3 433 6 cH = 77.63 (sd 0.19) 2
0 0 7.0 450 470 76.36 77.70 469 6 too high but OK
uH = 0.33, d/s = 1.6, h = 0.06
79) kao + 2q = prl + H2O (McPhail unpub; Hemley et al., 1980)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 1.0 261 285 59.88 61.25 3 288 6 2 (60.91 <-> 61.70)
0 0 5.0 306 333 61.35 62.84 307 8 cH = 61.43 (sd 0.37)
within bracket
uH = 0.28, d/s = -0.2, h = 0.65
80) 2kao = 2dsp + prl + 2H2O (Hemley et al., 1980)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 1.0 288 312 120.56 123.29 295 8 1 (120.84 <-> 123.02)
cH = 121.38 (sd 0.73)
within bracket
uH = 0.57, d/s = 2.4, h = 0.35
81) tpz = ky + H2O (Wunder et al. 93)
ln_K x(CO2) P(kbar) T(C) H(low) H(high) miss calc 2sd summary
0 0 55.0 50.0 700 68.04 70.09 50.06 3.18 2 (69.33 <-> 70.80)
0 0 90.0 85.0 1000 70.04 71.68 89.93 4.14 cH = 70.06 (sd 0.67)
within bracket
uH = 0.56, d/s = 0.0, h = 1.00
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