temperature: 25.0 °C
coefficients_of_thermal_dispersion: 2.92e-06 1.21e-08 -3.34e-11 4.43e-07 5.78e-10 0.195
density: 3.19 g/cm3
coefficient_of_thermal_expansion_1: 6.6e-06 K-1
coefficient_of_thermal_expansion_2: 7.6e-06 K-1
1) OHARA optical glass datasheets 2015-12-01
2) OHARA Zemax catalog 2015-12-01
Ohara Group is an international group of companies with headquarters in Japan and subsidiaries in Japan (Ohara, Inc.), United States (Ohara Corporation), and Germany (Ohara, GmbH). Ohara manufactures optical and electronic products and also offers measurement services, in particular measurement of refractive indices of solids and liquids.