[1] S. M.Clark, P.Dera, R. T.Downs, G. J.Finkelstein, O.Grubor-Urosevic, V.Prakapenka, M. L.Rivers, O.Tschauner, K.Zhuravlev. High pressure single-crystal micro X-ray diffraction analysis with GSE_ADA/RSV software. High Pressure Res., 33, 466(2013).

[2] P.Dera, R. T.Downs, B.Lavina. Modern X-ray diffraction methods in mineralogy and geosciences. Rev. Mineral. Geochem., 78, 1(2014).

[3] P. K.Dera, P. J.Eng, V. B.Prakapenka, M. L.Rivers, J. E.Stubbs, D.Zhang, J. S.Zhang. High pressure single crystal diffraction at PX². J. Visualized Exp., 119, 54660(2017).

[4] S.Desgreniers, P.Loubeyre, L. F.Lundegaard, M. I.McMahon, G.Weck. Observation of an O₈ molecular lattice in the ε phase of solid oxygen. Nature, 443, 201(2006).

[5] J.-K.Bao, W.Cai, D. Y.Chung, J.Coles, K. P.Hilleke, M. G.Kanatzidis, W.Lin, J.Xu, Y.Yan, D.Zhang. Pressure-induced superconductivity in the wide-band-gap semiconductor Cu₂Br₂Se₆ with a robust framework. Chem. Mater., 32, 6237(2020).

[6] P.Dera, R. T.Downs, T. S.Duffy, G. J.Finkelstein, Y.Meng, V.Prakapenka, S.Tkachev. Metastable high-pressure transformations of orthoferrosilite Fs₈₂. Phys. Earth Planet. Inter., 221, 15(2013).

[7] H. B.Larsen, R. H.Mathiesen, G.Thorkildsen. Angle calculations for a six-circle κ diffractometer. J. Appl. Crystallogr., 32, 943(1999).

[8] E.Austin. Advanced photon source. Synchrotron Radiat. News, 29, 29(2016).

[9] M. B.Franchini, L. D.Meinert, J. M.Vallés. First occurrence of ilvaite in a gold skarn deposit. Econ. Geol., 97, 1119(2002).

[10] N.Belov, V.Mokeeva. Kristallicheskaya struktura ilvaita. Tr. Inst. Kristallogr., Akad. Nauk SSSR, 9, 47(1954).

[11] A.Beran, H.Bittner. Untersuchungen zur kristallchemie des ilvaits. Tschermaks Mineral. Petrogr. Mitt., 21, 11(1974).

[12] N.Haga, Y.Takéuchi. Neutron diffraction study of ilvaite. Z. Kristallogr. -Cryst. Mater., 144, 161(1976).

[13] M.Bunno, N.Haga, Y.Takéuchi. X-ray study on polymorphism of ilvaite, HCaFe₂²⁺Fe³⁺O₂[Si₂O₇]. Z. Kristallogr. -Cryst. Mater., 163, 267(1983).

[14] L.Finger, R.Hazen. Crystal structure of monoclinic ilvaite and the nature of the monoclinic-orthorhombic transition at high pressure. Z. Kristallogr., 179, 415(1987).

[15] H.Ahsbahs, G.Amthauer, B.Ghazi-Bayat. High pressure X-ray diffraction study of ilvaite CaFe₂²⁺Fe³⁺[Si₂O₇O(OH)]. Phys. Chem. Miner., 20, 402(1993).

[16] L.Bindi, P.Bonazzi. Structural adjustments induced by heat treatment in ilvaite. Am. Mineral., 84, 1604(1999).

[17] M.Gottschalk, M.Koch-Müller, M.Mrosko, U.Schade. Pressure-induced phase transitions in ilvaite studied by in situ micro-FTIR spectroscopy. Eur. J. Mineral., 24, 831(2012).

[18] P.Bell, H.Mao, J.-A.Xu. Calibration of the ruby pressure gauge to 800 kbar under quasi‐hydrostatic conditions. J. Geophys. Res.: Solid Earth, 91, 4673(1986).

[19] C. M.Holl, S. D.Jacobsen, A.Kubo, V. B.Prakapenka, C.Pullins, M.Rivers. The COMPRES/GSECARS gas-loading system for diamond anvil cells at the Advanced Photon Source. High Pressure Res., 28, 273(2008).

[20] G. M.Sheldrick. A short history of SHELX. Acta Crystallogr., Sect. A: Found. Crystallogr., 64, 112(2008).

[21] L. J.Bourhis, O. V.Dolomanov, R. J.Gildea, J. A.Howard, H.Puschmann. OLEX2: A complete structure solution, refinement and analysis program. J. Appl. Crystallogr., 42, 339(2009).

[22] M.Alvaro, R. J.Angel, J.Gonzalez-Platas. EosFit7c and a Fortran module (library) for equation of state calculations. Z. Kristallogr. -Cryst. Mater., 229, 405(2014).

[23] R. J.Angel. Equations of state. Rev. Mineral. Geochem., 41, 35(2000).

[24] P.Dera, R. T.Downs, D.Fan, Y.Hu, J.Xu, D.Zhang. Isosymmetric pressure-induced bonding increase changes compression behavior of clinopyroxenes across jadeite-aegirine solid solution in subduction zones. J. Geophys. Res.: Solid Earth, 122, 142(2017).

[25] F.Izumi, K.Momma. VESTA 3 for three-dimensional visualization of crystal, volumetric and morphology data. J. Appl. Crystallogr., 44, 1272(2011).

[26] W.Baur. The geometry of polyhedral distortions. Predictive relationships for the phosphate group. Acta Crystallogr., Sect. B: Struct. Sci., 30, 1195(1974).

[27] G.Amthauer, B.Evans. The electronic structure of ilvaite and the pressure and temperature dependence of its ⁵⁷Fe Mössbauer spectrum. J. Phys. Chem. Solids, 41, 985(1980).

[28] P.Dera, D.Fan, X.Guo, Y.Hu, J.Xu, D.Zhang, J. S.Zhang, W.Zhou. Phase transitions in orthoenstatite and subduction zone dynamics: Effects of water and transition metal ions. J. Geophys. Res.: Solid Earth, 123, 2723(2018).

[29] P. K.Dera, D.Fan, X.Guo, J.Xu, D.Zhang, W.Zhou. Phase transition of enstatite-ferrosilite solid solutions at high pressure and high temperature: Constraints on metastable orthopyroxene in cold subduction. Geophys. Res. Lett., 47, e2020GL087363(2020).

[30] J. D.Bass, P.Dera, J. S.Zhang. A new high-pressure phase transition in natural Fe-bearing orthoenstatite. Am. Mineral., 97, 1070(2012).

[31] P. K.Dera, T. S.Duffy, G. J.Finkelstein. Phase transitions in orthopyroxene (En₉₀) to 49 GPa from single-crystal X-ray diffraction. Phys. Earth Planet. Inter., 244, 78(2015).

[32] B. D.Dunlap, S.Ghose, K.Xuemin. Phase transitions in ilvaite, a mixed-valence iron silicate I. A ⁵⁷Fe Mössbauer study of magnetic order and spin frustration. Phys. Chem. Miner., 16, 55(1988).

[33] Y.Takéuchi, T.Yamanaka. Mössbauer spectra and magnetic features of ilvaites. Phys. Chem. Miner., 4, 149(1979).

[34] S.Ghose, A.Hewat, M.Marezio. A neutron powder diffraction study of the crystal and magnetic structures of ilvaite from 305 K to 5 K—A mixed valence iron silicate with an electronic transition. Phys. Chem. Miner., 11, 67(1984).