Extended Data Bank (XDDB)

The XDDB has been originally created to store complex data which do not follow the strict rules the older DDB parts enforce and to store data which haven't been stored at all.
If such data couldn't be converted into standard formats or do not fit into existing data banks DDBST stored such data simply in Excel files for future usage.
With the introduction of the XDDB DDBST found a way to store such data unmodified and unconverted but accessible, retrievable, plottable, and exportable in the DDB main retrieval software. However, some restrictions apply because of the complexity of some data.

The XDDB contains a wide variety of data which is shown in the table below. Many of the new data types could be summarized under one label. For example, many properties give information about gas hydrates. This lead to the conclusion that some parts of the XDDB could be shown under such a label.
These XDDB derived data banks are currently:

  • Gas hydrate data (GHD)
  • Mixture viscosities (VIS)
  • Mixture dielectric constants (MDEC)
  • Electrical conductivities (ECND)
  • Diffusion coefficients (DIF)
  • Mixture flash points (MFLP)
  • Mixture P-v-T data (MPVT)
  • Mixture speeds of sound (MSOS)
  • Mixture thermal conductivities (MTCN)
  • Mixture surface tensions (MSFT)

These data banks are all extracts of (or views on) the XDDB and are not physically available. These partial data banks currently represent about 75 % of all data in the XDDB. The remaining 25 % are data for different properties or very complex data which couldn't be entered into the standard data banks. Although the majority of data in the XDDB is for mixtures some data for pure components are also stored. Most pure component properties, including, for example, viscosities, dielectric constants, electrical conductivities, flash points, etc., are stored in the pure component properties data base (PCP).

Table: Overview of all XDDB properties; Status of 2016-Feb-12.

#Abbrev.PropertySystemsComponentsSetsPoints
1 DIJ Diffusion Coefficients (I in J) 1015 474 1735 13948
2 SVLE Solid-Liquid-Vapor Equilibrium (XL = XLVL and  XLSL, T = TBUB and TMELT and TSUBL, P = PBUB and PMELT and PSUBL) 175 166 294 3618
3 PVT Pressure-Volume/Density-Temperature(-Composition) 1101 519 11497 209068
4 n2D Refractive Index 170 132 317 4793
5 VLE Vapor-Liquid Equilibrium (XL = XLVL, YV = YVVL, T = TBUB and/or TDEW, P = PBUB and/or PDEW) 766 392 2355 35863
6 dHDil Heat of Dilution 354 206 854 12944
7 dHSolv Heat of Solution/Solvation 1639 682 2633 21925
8 GLE Gas Solubilities 458 270 1190 15633
9 hE Heat of Mixing 208 132 712 12588
10 Lw-H(I) Liquid-Hydrate(Type I)-Equilibrium 5 7 6 30
11 IHFT Initial Hydrate Formation Temperature 16 9 28 100
12 LLE Liquid-Liquid-Equilibrium 1123 624 1820 17159
13 LLE/LCST LLE, Lower Critical Solution Temperature 12 15 12 52
14 LLE/binodal Binodal Data, LLE 340 245 524 6050
15 LLE/tie lines Tie Line Data, LLE 40 54 93 692
16 PCVLE Partition Coefficients, KIJ, VLE 178 176 304 2508
17 IGCP Ideal Gas Heat Capacities 7 8 8 171
18 JTC Joule Thomson Coefficient 9 10 42 954
19 PVTz, Phase Eq. Phase Boundary Data, Critical Points, Univariant Data 212 120 509 15779
20 HFC Hydrate Forming Conditions 121 60 340 2738
21 EGLE Gas Solubilities (System contains Electrolyte) 79 81 135 3804
22 eps Dielectric Constant 2833 1355 6752 69534
23 RHO Liquid Density 7515 1822 30709 376716
24 EVLE Vapor-Liquid Equilibrium (System contains Electrolyte) 112 87 300 5006
25 SOS Speed of Sound 5001 1136 17273 231442
26 dV/VdP Isentropic, Isothermal, Adiabatic, ... Compressibility 94 75 291 4604
27 VIS Dynamic Viscosity 8206 1841 37283 435405
28 AppVM Apparent Molar Volume 360 259 1477 13908
29 dHSAT Enthalpy Data at Saturation Conditions 6 7 13 82
30 PSVL Saturation Vapor Pressure 27 31 32 319
31 SLE Solid-Liquid Equilibrium 3636 1796 4560 27574
32 dHfus Heat of Fusion 106 138 127 698
33 SFT Surface Tension 1948 777 5616 69741
34 cpM Isobaric Heat Capacity 237 209 625 19165
35 VSPEC Specific Volume 3 7 16 128
36 vE Excess Molar Volume 89 74 243 4461
37 TCN Thermal Conductivity 786 339 4764 46636
39 HTP Enthalpy Data at Different Conditions 77 46 407 11340
40 VLE/DP Dew Points 161 122 382 4896
41 VLLE Vapor-Liquid-Liquid-Equilibrium 193 109 294 5126
42 VLLE/TP VLLE, univariant T,P-data 106 78 137 2142
43 VSE Vapor-Solid-Equilibrium 53 64 131 1319
44 AuxD Auxilliary Data (further information) 85 112 130 2043
45 dC/dt Reaction kinetics 21 53 128 2676
46 Keq Chemical Reaction Equilibrium 66 139 129 1604
47 IHFC Incipient Hydrate Formation Conditions 48 29 125 980
48 RoAb Rate of Absorption 20 22 54 1005
49 Virial Virial Coefficients 105 72 130 826
50 VLE/BP Bubble Points 195 152 543 6113
51 HFH Enthalpy of Hydrate Formation 5 7 12 66
52 L-H-G Gas-Liquid-Hydrate-Equilibrium (Liquid unspecified) 41 37 85 1117
53 AHD Additional Hydrate Related Data 1 3 1 2
54 DPM Dipole Moment 51 46 53 270
55 ELCND Electrical Conductivity 2799 1336 8745 100830
56 HDC Hydrate Decomposition Conditions 306 135 716 5661
57 H-L Liquid-Hydrate-Equilibrium (Liquid unspecified) 17 15 34 306
58 H-G Gas-Hydrate-Equilibrium 22 18 55 456
59 pKA Dissociation constants 294 212 353 2129
60 pH pH as function of T, x, .... 306 180 436 3722
61 I-H(I)-G Gas-Ice-Hydrate(Type I)-Equilibrium 4 5 7 33
62 HPheqD Phase Equilibria under Hydrate Forming Conditions 38 27 62 1166
63 GGE Gas-Gas Equilibrium Data 6 7 16 972
64 KVIS Kinematic Viscosity 1205 453 4033 46211
65 cVM Isochoric Heat Capacity 15 18 143 4349
66 PCLLE Partition Coefficients KIJ, LLE 1283 647 1419 6504
67 dHVap Enthalpy of Vaporization 31 33 37 415
68 deltaETA Deviation (from ideality) of Viscosity 1 2 15 150
69 Flash Points Flash Points 357 189 556 5780
70 Lw-H-G-Lg Gas-Liquid-Liquid-Hydrate-Equilibrium (Lw = aqueous liquid, Lg = condensed gas) 54 45 118 496
71 dSSAT Entropy Data at Saturation Conditions 53 35 53 233
72 dHSub Enthalpy of Sublimation 7 7 7 14
73 dHtr Enthalpy of Phase Transition 23 34 25 198
75 VLE/ACT Activities/Activity Coefficients (at infinite Dilution) 355 186 702 7494
76 SSE Solid-Solid-Equilibrium 70 87 83 789
77 DII Self Diffusion Coefficients (I in I) 1 1 1 12
78 LLLE Liquid-Liquid-Liquid-Equilibrium 3 7 6 125
79 VLLLE Vapor-Liquid-Liquid-Liquid-Equilibrium 8 10 9 85
80 Lw-H-Lg Liquid-Liquid-Hydrate-Equilibrium (Lw = aqueous liquid, Lg = condensed gas) 68 51 137 1271
81 HydrateTP Hydrate-other Phases-boundaries 11 11 21 247
82 dHf,dSf Departure function data, heats/entropies of formation 63 70 169 2818
83 HDH Hydrate Decomposition Enthalpy 23 16 39 165
84 SVLLE Quadruple point/curve data 28 32 28 81
85 TEC Thermal Expansion Coefficient 14 19 16 166
86 Lw-I-H-G Ice-Gas-Liquid-Hydrate-Equilibrium (Lw = aqueous liquid) 19 22 30 99
87 I-H-G Gas-Ice-Hydrate-Equilibrium 43 37 91 726
88 H-G-Lg Gas-Liquid-Hydrate-Equilibrium (Lg = condensed gas) 19 21 28 232
89 Lw-I-H Liquid-Hydrate-Ice-Equilibrium (Lw = aqueous liquid) 2 3 2 9
90 Lw-H-G Gas-Liquid-Hydrate-Equilibrium (Lw = aqueous liquid) 491 144 1831 16116
91 Lw-H-G-Lg-Lo Gas-Liquid-Liquid-Liquid-Hydrate-Equilibrium (Lw =aqueous liquid, Lg = condensed gas, Lo = organic/other liquid) 3 5 3 6
92 Lw-H-Lg-Lo Liquid-Liquid-Liquid-Hydrate-Equilibrium (Lw = aqueous liquid, Lg = condensed gas, Lo = organic/other liquid) 4 6 4 45
93 H-G-Lg-Lo Gas-Liquid-Liquid-Hydrate-Equilibrium (Lg = condensed gas, Lo = organic/other liquid) 2 4 2 5
94 Lw-H-G-Lo Gas-Liquid-Liquid-Hydrate-Equilibrium (Lw = aqueous liquid, Lo = organic/other liquid) 179 99 267 2097
95 Lw-H Liquid-Hydrate-Equilibrium (Lw = aqueous liquid) 17 17 36 325
96 Lg-H Liquid-Hydrate-Equilibrium (Lg = condensed gas) 4 7 12 128
97 I-H-G-Lo Gas-Ice-Liquid-Hydrate-Equilibrium (Lo = organic/other liquid) 6 8 8 72
98 Autoignition Conditions Autoignition Temperatures 12 13 14 43
99 Explosivity Limits Explosivity (Range of concentrations, Temperature, ..) 11 13 25 80
100 dHreac Heat of Reaction 10 24 19 152
101 C-G-Lo Gas-Liquid-Clathrate-Equilibrium (Lo = organic/other liquid) 6 7 7 58
102 Lw-H-C-G Gas-Liquid-Hydrate-Clathrate-Equilibrium (Lw = aqueous liquid) 1 3 2 4
103 Lw-C-G-Lo Gas-Liquid-Liquid-Clathrate-Equilibrium (Lw = aqueous liquid, Lo = organic/other liquid) 1 3 2 7
104 Lw-C-G-Lg-Lo Gas-Liquid-Liquid-Liquid-Clathrate-Equilibrium (Lw =aqueous liquid, Lg = condensed gas, Lo = organic/other liquid) 1 3 1 2
105 Lw-Lg-C-G Gas-Liquid-Liquid-Clathtrate-Equilibrium (Lw =aqueous liquid, Lg = condensed gas) 5 5 5 17
106 C-G-Lw Gas-Liquid-Clathrate-Equilibrium (Lw = aqueous liquid) 3 5 6 32
107 Lw-H-C Liquid-Hydrate-Clathrate-Equilibrium (Lw = aqueous liquid) 1 3 1 2
108 Lw-C-Lo Liquid-Liquid-Clathrate-Equilibrium (Lw = aqueous liquid, Lo = organic/other liquid) 1 3 1 5
109 Thermal Decomposition Thermal Stability/ Decomposition Conditions 8 9 8 16
110 AppCP Apparent Heat Capacity 285 241 1997 20911
111 LLLLE Liquid-Liquid-Liquid-Liquid-Equilibrium 1 5 2 26
112 RoAd Rate of Adsorption 2 4 6 312
113 PourPoint Pour point 19 19 22 44
114 Fire Points Fire Points 11 11 11 36
115 PhsTrns Phase Transition related data 68 73 97 752
116 RoSl Rate of Dissolution/Solvation (S->L) 2 3 3 43
117 H1-H2-Lg Liquid-Hydrate1-Hydrate2-Equilibrium (Lg = liquid rich in gas) 1 2 1 14
118 H2-Lw-Lg Liquid-Liquid-Hydrate2-Equilibrium (Lg = liquid rich in gas, Lw = aqueous liquid) 1 2 1 15
119 H2-I(VII)-Lw Hydrate2-Ice-VII-Liquid-Equilibrium (Lw = aqueous liquid) 1 2 1 7
120 H1-H2-I(VII) Hydrate1-Hydrate2-Ice-(VII)-Equilibrium 1 2 1 3
121 H1-H2-I(VII)-Lw Liquid-Hydrate1-Hydrate2-Ice-(VII)-Equilibrium (Lw = aqueous liquid) 1 2 1 2
122 H1-H2-Lw-Lg Liquid-Liquid-Hydrate1-Hydrate2-Equilibrium (Lg = liquid rich in gas, Lw = aqueous liquid) 1 2 1 2
123 ThDiff Thermal Diffusivity 2 3 16 262
124 AAE Adsorbent-Adsorbate Equilibrium 7 5 9 65
125 Lw-H-Sg Aq.Liquid/Hydrate/Solid(org.) 3 4 5 82
126 Lg-H-Sg Liq.Gas/Hydrate/Solid(org.) 1 2 1 25
127 Lw-Lg-H-Sg Aq.Liquid/liq.Gas/Hydrate/Solid(org.) 6 8 9 64
128 Flammability Limit Flammability Limit 4 5 4 100