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Behavior of the AB2-Type Compounds at High Pressures and High Temperatures

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Behavior of the AB2-Type Compounds at High Pressures and High Temperatures Behavior of the AB2-Type Compounds at High Pressures and High Temperatures Cite as: Journal of Physical and Chemical Reference Data 11, 1005 (1982); https:// doi.org/10.1063/1.555670 Published Online: 15 October 2009 Leo Merrill ARTICLES YOU MAY BE INTERESTED IN Behavior of the AB-type compounds at high pressures and high temperatures Journal of Physical and Chemical Reference Data 6, 1205 (1977); https:// doi.org/10.1063/1.555565 Crystal structure prediction using ab initio evolutionary techniques: Principles and applications The Journal of Chemical Physics 124, 244704 (2006); https://doi.org/10.1063/1.2210932 The metallization and superconductivity of dense hydrogen sulfide The Journal of Chemical Physics 140, 174712 (2014); https://doi.org/10.1063/1.4874158 Journal of Physical and Chemical Reference Data 11, 1005 (1982); https://doi.org/10.1063/1.555670 11, 1005 © 1982 American Institute of Physics for the National Institute of Standards and Technology. Behavior of the AB2 Type Compounds at High Pressures and High Temperatures Leo Merrill* Department of Chemistry, Brigham Young University, Provo, Utah 84602 Data on the polymorphic phase transformations of known compounds and new syn­ tlu:::tk compounds of the type AD2 have been compiled amI evaluated. All available pres­ sure studies have been included and referenced. Pressure-temperature phase diagrams showing first order solid-solid phase boundaries and/or melting curves showing the best fit to the experimental data are included. For some materials which can be produced only by chemical syrithesis techniques at high pressures and high temperatures, reaction-pro­ duct diagrams have been employed to estimate the region of thermodynamic stability. Crystallographic data of all the known phases of each material have been tabulated and evaluated. This review covers 168 compounds and 332 phases including the room tem­ perature atmospheric pressure phase for each compound when it exists. Key words: AB2-type compounds; calibration; critically evaluated data, crystallographic data; experimental melting curves; p, T phase diagrams; polymorphism; solid-solid phase boundaries; high pressure; high tempera­ ture. Contents Page Page 1. Introduction............... ............... ........ ................... 1007 7.14. SrCI2·6H20................................................. 1038 2. Antimonides [RSb2(R = Pr,Gd,Tb,Dy,Ho, 7.15. HgBr2 .......................................................... 1038 Er,Lu,Y)] .............................................................. 1032 7.16. ZnBr2 .....................................................·..... 1039 3. Arsenides .............................................................. 1033 7.17. GeI2 ............................................................ 1039 3.1. CdASz ......................................................... 1033 7.18. HgI2 ............................................................ 1039 3.2. Mn2As......................................................... 1034 8. Oxides ................................................................... 1040 3.3. NiAs2 .......................................................... 1034 8.1. Ag20 ........................................................... 1040 3.4. SiASz ........................................................... 1034 8.2. cr02............................................................ 1040 3.5. ZnAs2.......................................................... 1034 8.3. H20 ............................................... ;............. 1040 4. Borides.................................................................. 1035 8.4. D 20 ............................................................. 1041 4.1. 5mB2 ........................................................... 1035 8.5. Ge02 ........................................................... 1041 5. Carbides [RC2(R = Tb,Dt,Ho,Er,Tm,Yb, 8.6. Hf02............................................................ 1042 Lu,Y)) ................................................................... 1035 8.7. Mn02 ........................................................... 1042 6. Germanides ......... ~ ................................................. 1035 S.S. Pb02 ........................................................... 1042 6.1. BaGe2.......................................................... 1035 8.9. Pt02 ............................................................ 1043 7. Halides .................................................................. 1035 8.10. Rh02 ........................................................... 1043 7.1. BaF2 ............................................................ 1035 8.11. Si02 ............................................................. 1043 7.2. BeF2 .............. ~ ............................................. 1036 8.12. Sn02 ............................................................ 1045 7.3. CaF2 ....· ........................................................ 1036 8.13. Te02............................................................ ~045 7.4. CoF2 ............................................................ 1036 8.14. Ti02 ............................................................ 1046 7.5. EuF2 ............................................................ 1036 8.15. zr02 ............................................................ 1047 7.6. MnF2 ........................................................... 1036 8.16. Zn(OH}2 ...................................................... 1047 7.7. NiF2 .......................................................... ~. 1037 9. Phosphides ........................................................... 1048 7.8. PbF2 ............................................................ 1037 9.1. COP2 ............................................................ 1048 7.9. SrF2 ............................................................. 1037 9.2. GeP2 ............................................................ 1048 7.10. ZnF2 ............................................................ 1037 9.3. NbPL7 ......................................................... 1048 7.11. FeC12 ........................................................... 1037 9.4. SiP2 ................................... : ......................... 1048 7.12. HgCI2 .......................................................... 1037 9.5. VP L75 .......................................................... 1048 7.13. SrCl2 ........................................................... 1038 9.6. ZnP2 ............................................................ 1048 10. Silicides ................................................................. 1048 ·Present address: Christensen, Inc., Diamond Technology Center, 2532 10.1. BaSi ......................................................... 1048 South 3270 We&t, Salt Lake; City, Uutb 84119. 2 10.2. CaSi2 .......................................................;. 1048 @ 1982 by the U.S. Secretary of Commerce on behalf of the United States. 10.3. EuSi ......................................................... 1049 This copyright is assigned to the American Institute of Physics and the 2 American Chemical Society. 10.4. SrSi2 .......................................................... 1049 Reprints available from ACS; see Reprint List at back of issue. II. Sulfides ................................................................. 1049 0047-2689/82/041005-60/$08.00 1005 J. Phys. Chem. Ref. Data, Vol. 11, No.4, 1982 1006 LEO MERRILL Page Page 11.1. Ag2S ........................................................ 1049 14.7. Cux Fet _ xS2........................................... 1058 11.2. BiS2 ......................................................... 1049 14.8. NixFet _ x Y2 ............... ;........................... 1058 11.3. CS2 .......................................................... 1049 [NixFe1_xS2 (x = 0.76)]......................... 1058 11.4. CdS2 ... ··.·.··· ............................................. 1050 [NixFet _xSe2 (x = 0.40 - 0.60)] ............ 1058 11.5. Cu2S........................................................ 1050 14.9. CrxCot _ xS2 ........................................... 1058 11.6. CuS2 ........................................................ 1051 15. Alloy and Intermetallic Compounds .... ~............. 1059 11.7. GeS2 ........................................................ 1051 15.1. AuX2(X = AI,Ga,In) .............................. 1059 11.8. H2S.......................................................... 1051 15.2. LaCo2...................................................... 1060 11.9. IrS2.......................................................... 1051 15.3. Mg2X(X = Si,Ge,Sn)............................... 1060 11.10. MoS2 ....................................................... 1052 15.4. Rare Earth Iron Compounds 11.11. NbS2........................................................ 1052 [RFe2(R = Pr,Nd,Sm,Gd,Tb, 11.12. PbS2 ........................................................ 1052 Ho,Yb,Lu)) ............................................. 1060 11.13. PdS2 ........................................................ 1052 15.5. Rare Earth Manganese Compounds 11.14. SiS2 .......................................................... 1052 [RMn2(R = Sm,Gd,Tb,Dy,Ho, Yb, Y)]... 1060 11.15. SrS2......................................................... 1052 15.6. MnAu2· .. ·· .. · .... · ....................... ·..... · ...... ·.. 1061 11.16. ZnS2 ........................................................ 1052 15.7. NdRu2.......... ·.........................................
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