@article {Manghnani:June 2005:0026-461X:317,
	author = "Manghnani, M.H.",
	author = "Amulele, G.",
	author = "Smyth, J.R.",
	author = "Holl, C.M.",
	author = "Chen, G.",
	author = "Prakapenka, V.",
	author = "Frost, D.J.",
	title = "Equation of state of hydrous Fo90 ringwoodite to 45 GPa by synchrotron powder diffraction",
	journal = "Mineralogical Magazine",
	volume = "69",
	year = "June 2005",
	abstract = "The equation of state of Fo<SUB>90</SUB> hydrous ringwoodite has been measured using X-ray powder diffraction to 45 GPa at the GSECARS beam line at the Advanced Photon Source synchrotron at Argonne National Laboratory. The sample was synthesized at 1400&#176;C and 20 GPa in the 5000 ton multi anvil press at Bayerisches Geoinstitut in Bayreuth. The sample has the formula Mg<SUB>1.70</SUB>Fe<SUP>2+</SUP><SUB>0.19</SUB>Fe<SUP>3+</SUP><SUB>0.02</SUB>H<SUB>0.13</SUB>Si<SUB>1.00</SUB>O<SUB>4</SUB> as determined by electron microprobe, Fourier transform infrared and M&ouml;ssbauer spectroscopies, and contains ~0.79&#037; H<SUB>2</SUB>O by weight. Compression of the sample had been been measured previously to 11 GPa by single crystal X-ray diffraction. A third-order Birch-Murnaghan equation of state fit to all of the data gives <I>V</I><SUB>0</SUB> = 530.49&#177;0.07 &Aring;<SUP>3</SUP>, <I>K</I><SUB>0</SUB> = 174.6&#177;;2.7 GPa and <I>K</I><IMG SRC="/iso-ents/isotech/prime.gif" ALT="prime"> = 6.2&#177;0.6. The effect of 1&#037; H incorporation in the structure on the bulk modulus is large and roughly equivalent to an increase in the temperature of ~600&#176;C at low pressure. The large value of <I>K</I><IMG SRC="/iso-ents/isotech/prime.gif" ALT="prime"> indicates significant stiffening of the sample with pressure so that the effect of hydration decreases with pressure.",
	pages = "317-324(8)",
	url = "http://www.ingentaconnect.com/content/minsoc/mag/2005/00000069/00000003/art00007"
	doi = "doi:10.1180/0026461056930253"
}