| Code | Opal |
| Mineral Group | Silica |
| Mineral Class | Framework Silicate |
| Formula | SiO2*.1209(H2O) |
| Occurrence | In silicious sediments, biogenic source. |
| Electron Density, calculated from formula (Rhoe_Calc) | 2.17 |
| Litho Density, calculated from formula (Rhol_Calc) | 2.13 |
| Gamma Ray, measured empirically (Gr_Meas) | 79.00 |
| Photoelectric Factor, calculated from formula (Pef_Calc) | 1.75 |
| Photoelectric Factor, measured empirically (Pef_Meas) | 2.50 |
| Volumetric Photoelectric Factor, calculated from formula (Uma_Calc) | 3.79 |
| Neutron Cross-section, calculated from formula (Sigma_Calc) | 5.26 |
| Neutron Cross-section, measured empirically (Sigma_Meas) | 22.60 |
| Neutron slowing-down length, calculated from formula (Ls_Calc) | 18.62 |
| Neutron diffusion length, calculated from formula (Ld_Calc) | 14.37 |
| Epithermal CNL porosity, calculated from formula (Epi_Calc) | 3.30 |
| Epithermal CNL porosity, measured empirically (Epi_Meas) | 4.70 |
| Thermal CNL porosity, calculated from formula (Therm_Calc) | 1.90 |
| Thermal CNL porosity, measured empirically (Therm_Meas) | 8.50 |
| Bulk Modulus, calculated from formula (Bmod_Calc) | |
| Shear Modulus, calculated from formula (Smod_Calc) | |
| Delta-T Compressional (us/m), calculated from formula (Dtc_Calc) | 190.30 |
| Delta-T Shear (us/m), calculated from formula (Dts_Calc) | |
| Poisson's Ratio, calculated from formula (Pr_Calc) | |
| EPT Propagation time, calculated from formula (Tp_Calc) | |
| Molecular weight, calculated from formula (Mol_Wt_Calc) | 62.27 |
| Bulk Density, calculated from formula (Rho_Calc) | 2.16 |
| Weight % of Hydrogen, calculated from formula (H_Calc) | 1.00 |
| Weight % of Carbon, calculated from formula (C_Calc) | |
| Weight % of Oxygen, calculated from formula (O_Calc) | 56.40 |
| Weight % of Sodium, calculated from formula (Na_Calc) | |
| Weight % of Sodium, measured empirically (Na_Meas) | 0.70 |
| Weight % of Magnesium, calculated from formula (Mg_Calc) | |
| Weight % of Magnesium, measured empirically (Mg_Meas) | 0.30 |
| Weight % of Aluminum, calculated from formula (Al_Calc) | |
| Weight % of Aluminum, measured empirically (Al_Meas) | 1.40 |
| Weight % of Silicon, calculated from formula (Si_Calc) | 42.60 |
| Weight % of Silicon, measured empirically (Si_Meas) | 40.00 |
| Weight % of Potassium, calculated from formula (K_Calc) | |
| Weight % of Potassium, measured empirically (K_Meas) | 0.50 |
| Weight % of Calcium, calculated from formula (Ca_Calc) | |
| Weight % of Calcium, measured empirically (Ca_Meas) | 0.50 |
| Weight % of Iron, calculated from formula (Fe_Calc) | |
| Weight % of Iron, measured empirically (Fe_Meas) | 0.50 |
| Weight % of Boron, calculated from formula (B_Calc) | |
| Boron concentration (ppm), measured empirically (B_Meas) | 160.00 |
| Weight % of Nitrogen, calculated from formula (N_Calc) | |
| Weight % of Fluorine, calculated from formula (F_Calc) | |
| Weight % of Phosphorus, calculated from formula (P_Calc) | |
| Weight % of Sulfur, calculated from formula (S_Calc) | |
| Weight % of Sulfur, measured empirically (S_Meas) | 0.35 |
| Weight % of Chlorine, calculated from formula (Cl_Calc) | |
| Weight % of Titanium, calculated from formula (Ti_Calc) | |
| Weight % of Titanium, measured empirically (Ti_Meas) | 0.10 |
| Weight % of Manganese, calculated from formula (Mn_Calc) | |
| Weight % of Copper, calculated from formula (Cu_Calc) | |
| Weight % of Zinc, calculated from formula (Zn_Calc) | |
| Weight % of Strontium, calculated from formula (Sr_Calc) | |
| Weight % of Zirconium, calculated from formula (Zr_Calc) | |
| Weight % of Barium, calculated from formula (Ba_Calc) | |
| Weight % of Lead, calculated from formula (Pb_Calc) | |
| Thorium concentration (ppm), measured empirically (Th_Meas) | 4.70 |
| Uranium concentration (ppm), measured empirically (U_Meas) | 6.50 |
| Gadolinium concentration (ppm), measured empirically (Gd_Meas) | 1.30 |
| Loss on Ignition, % weight, measured empirically (Loi_Meas) | 6.50 |
| Volatile H component of LOI(H2O+), measured empirically (H_Loi_Meas) | 4.20 |
| Trace Elements | Mg,Na,Al,K,Ca,Fe |
| Description | |
