Equation of state data 

From here you can download the eos parameters for many phases as '.eos' files. These files can be 'loaded' directly in to the EosFit7 software so that
you can do calculations immediately. You can also use EosFit7c to modify the parameters within the files.
Important:




EoS useful for pressure measurement 
Quartz 
The PV EoS for quartz (SiO2) as determined by Scherdl et al (2016)
Journal of Applied Crystallography, 49, 21292137. A reprint is available as a
pdf file, Copyright © International Union of Crystallography.
We use quartz as an internal pressure standard in singlecrystal diamondanvil cell experiments at room temperature. We measure the volume of the quartz by diffraction and use this EoS to convert the measured volume to pressure. This new EoS extends to 19 GPa. It replaces the previous quartz EoS determined by Angel et al (1997). 
Old quartz 
The PV EoS for quartz (SiO2) as determined by Angel et al (1997)
Journal of Applied Crystallography, 30, 461466. A reprint is available as a
pdf file, Copyright © International Union of Crystallography. You should no longer use this EoS. You should use the new EoS determined by Scherdl et al (2016). If you want to convert the pressures previously determined by this EoS to the new pressure scale given by Scherdl et al (2016), download both eos files for quartz and use the pshift command in the EosFit7c to convert the pressures in your dataset. 


EoS of example datasets distributed with EosFit These eos files hold the results of fitting the example datasets distributed with EosFit7c. Details of how to fit the data and obtain these results are provided in the 'worked examples' section of the EosFit7 help system. 
Quartz 
The PV EoS for quartz (SiO2) as determined by Angel et al (1997)
Journal of Applied Crystallography, 30, 461466. A reprint is available as a
pdf file, Copyright © International Union of Crystallography. We use quartz as an internal pressure standard in singlecrystal diamondanvil cell experiments. We measure the volume of the quartz by diffraction and use this EoS to convert the measured volume to pressure. 
BirchMurnaghan 3rd order EoS K0 = 37.12(5) GPa K' = 5.99(5) 
Ferropericlase 
Equation of state obtained from the pressurevolumetemperature data (up to 2000K and 50GPa) using a BM3 EoS combined with a Bermantype thermal expansion. Beware that data have been only considered up to 50GPa (i.e. well below the spin transition).The original PVT data are taken from
Mao et al. (2011) GRL 38, L23308 
BirchMurnaghan 3rd order EoS K0 = 162(14) GPa K' = 4.1(6) dK/dT=0.018(7) GPa/K alpha0=4.0(6) x 10^5 /K, alpha1=0.1(6) x 10^8 K^2 
Kalsilite lowP Kalsilite highP 
Equations of state obtained from the pressurevolume data of kalsilite Gatta et al. (2011) Amer. Mineral. 96, 461. The two eos files are for the lowpressure and highpressure phases, seperated by a phase transition at ~3.6 GPa. 
BirchMurnaghan 3rd order EoS Low P: K0 = 60 GPa, K' = 3.5 High P: K0 = 44 GPa, K' = 6.5 
Lawsonite fit1 Lawsonite fit2 
Thermal expansion equations obtained from the VT data of lawsonite Pawley et al. (1996) Amer. Mineral. 81, 335. Fit1 is a modified HollandPowell expansion (see EosFit help) and Fit2 has the alpha2 parameter fixed at zero in the Pawley approximation. 
Modified HollandPowell expansion Fit 1: alpha0=1.3(5) x 10^5 /K, alpha1=5.5(6) x 10^4 K^2 Fit 1: alpha0=5.55(15) x 10^5 /K, alpha1= 0 


EoS useful for hostinclusion calculations For details about hostinclusion piezobarometry, see:

Diamond 
Our best estimate of the PVT EoS for diamond determined from a critical review of the most recent experimental data
(elasticity, heat capacity, PV data) and DFT simulations
(Angel et al., (2014) Russian Geology & Geophysics, 56,211).

BM3MGD olivine BM4MGD olivine BM3Isothermal olivine BM4Isothermal olivine 
Our best estimate of the PVT EoS for mantle composition olivine (Fo90Fo92) determined from a critical review
and a combined fit of elasticity and volume data from singlecrystal measurements. Full details in
Angel et al., (2018) Physics and Chemistry of Minerals, 45, 95113. There are four EoS:

Pyrope 
A PVT EoS for pure pyrope garnet derived by
Milani et al (2015) Lithos 227, 140147
from new highpressure and hightemperature measurements of the volume, combined with lowtemperature VT data of
Bosenick and Geiger (1997) JGR, Solid Earth 102, 22649.

Almandine 
A PVT EoS for pure pyrope garnet derived by
Milani et al (2015) Lithos 227, 140147
from new highpressure and hightemperature measurements of the volume, combined with lowtemperature VT data.

Grossular 
A PVT EoS for pure grossular garnet determined by
Milani et al (2017) American Mineralogist , 102, 851859
from simultaneous fitting of both volume data and the bulk modulus as determined by
Isaak et al (1992) Phys Chem Minerals 19,106120.

Quartz PVT 
This is a full PVT EoS for quartz, including the elastic softening in both alpha and beta quartz due to the alphabeta
phase transition, and a curved alphabeta phase boundary to fit all available reversals and constraints. EoS parameters
were determined by fitting simultaneously to both elastic moduli and PTV data. For details about this and the next two EoS for quartz
see Angel et al (2017) Contribs. Min. Pet., 172:29
or contact us.

Quartz V and a 
This file contains the full PVT EoS of quartz and the EoS for the acell parameter, both in Angstroms. They can be used together
to determine how the a,b,c and V of quartz change with P and T, in a selfconsistent way in the CELL utility of EosFit7c. See
Alvaro et al (2020) Geology, 48:24 for details.
The PVT EoS is the same as the previous one, but with volumes in A3/cell. The EoS for the acell parameter was determined with the same transition model by fitting the same sources of data. 
Quartz PVT 
This is a full PVT EoS for quartz, including the elastic softening in both alpha and beta quartz due to the alphabeta
phase transition, but with a linear alphabeta phase boundary with slope of 240GPa/K, from Thermocalc. EoS parameters
were determined by fitting simultaneously to both elastic moduli and PTV data. From Angel et al (2017) Contribs. Min. Pet., 172:29.

Quartz PVT 
This is a PVT EoS for quartz using a model similar to that in
Thermocalc, with elastic softening only in alpha quartz.
Linear alphabeta phase boundary with slope of 240GPa/K, from Thermocalc. These EoS parameters
were determined by fitting simultaneously to both elastic moduli and PTV data and can be used with Thermocalc.
From Angel et al (2017) Contribs. Min. Pet., 172:29.

Rutile aaxis Rutile caxis Rutile V 
These are EoS for the cell parameters and the volume of rutile determined by fitting simultaneously to both elastic moduli and
diffraction data in the literature. Full details in a manuscript by
Zaffiro et al. (2019), Mineralogical Magazine, 83:339.
You can try fitting the data yourself with the three dataset files for rutile formatted for EosFit: cell parameters and volume dataset adiabatic linear and bulk moduli at high T adiabatic bulk moduli at high P 
Rutile MGD 
This is an MGD EoS fitted to the same data for rutile, with a refined value of the qparameter. It provides a very similar
PVT relationship as the 'isothormal' PVT EoS given above, but may be more reliable at more extreme P and T. For a discussion of
the role of the qparameter in MGD EoS, and a comparison of different EoS of rutile, see
Angel et al. (2020), Mineralogical Magazine, in press.
The qcompromise form of the MGD EoS discussed in this paper is not supported by the release version of EosFit7c, but will be released with the next release of the EosFit7c software. 
Zircon MGD 
This is an MGD EoS fitted to new PV and elasticity data for zircon, together with literature TV data. This EoS has been developed by
Alix Ehlers of Virginia Tech, and a manuscript describing the data and fitting in detail has been submitted to American Mineralogist.
If you use it, please reference it for now as Ehlers et al (2020) submitted, and
check with us for an updated reference prior to your final publication.

Zircon V Zircon aaxis Zircon caxis 
These are isothermaltype EoS for the zircon volume and unitcell parameters fitted to the same datasets as described for the MGD EoS for zircon.
If you use them, please reference them for now as Ehlers et al (2020) submitted, and
check with us for an updated reference prior to your final publication.
