Amp-Pl: Holland, Blundy, 1994

For edenite + 4 quartz = tremolite + albite (A) and edenite + albite = richterite + anorthite (B) equilibrium. Based on Al in Amp.

Details

Article	Tim Holland, Jon Blundy Non-ideal interactions in calcic amphiboles and their bearing on amphibole-plagioclase thermometry, 1994 [ref]
Collibration
Precision	± 50 °C
Ranges	1 < P < 16 kbar, 400 °C < T < 1100 °C
Renew sensors	Blundy and Holland (1990), Kohn and Spear (1989, 1990).

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Source

source('recalc_amp_holland_blundy.r');

sensors.p.amp_pl_holland_blundy <- function(Amp, Temp, usePFU = FALSE, ...){

    if(!usePFU) Amp <- recalc.amp_holland_blundy(Amp);
         
    P <- 4.76*Amp$Al_pfu-3.01-((Temp-675)/85)*(0.53*Amp$Al_pfu+0.005294*(Temp-675))

    return (data.frame(Name=Amp$Name, T_seq=Temp, P_calc_Holland_Blundy=P));
}

sensors.p.amp_pl_holland_blundy.args <- function() {
    ars <- list();
    ars$minerals = c('Amp');
    ars$ranges = c('Temp');
    return(ars);
}