Tags: Chemical Substance, Mineral.
Bytownite is a calcium rich member of the plagioclase solid solution series of feldspar minerals. It is usually defined as having %An between 70 and 90. Like others of the series bytownite forms grey to white triclinic crystals commonly exhibiting the typical plagioclase twinning and associated fine striations.The specific gravity of bytownite varies between 2.74 and 2.75. The refractive indices ranges are nα=1.563 – 1.572 nβ=1.568 – 1.578 and nγ=1.573 – 1.583.
