Parakeldyshite PL measurement, 77K, Gaft <i>et al.</i> 1981; Khomiakov 1995

Parakeldyshite PL measurement, 77K, Gaft et al. 1981; Khomiakov 1995

Reference	Gaft M.L., Gorobets B.S. and Khomiakov A.P. On the origins of the luminescence of minerals of titanium and zirconium. - Dokladi Academii Nauk SSSR. - 1981. - V. 260. - No. 5. - P. 1234-1237. ; Khomiakov A.P. Mineralogy of Hyperagpaitic Alkaline Rocks. Oxford: Clarendon Press - 1995. 224p.
Material	Parakeldyshite [ Na₂ZrSi₂O₇ ] White crystals of the rare mineral parakeldyshite from Bratthagen Quarries, Lågendalen, Hedrum, Larvik, Vestfold, Norway © Photo by David Hospital (via Wikimedia Commons), CC-BY-SA 4.0
Specimen temperature	77K
Technique	Photoluminescence (PL)
Line	Unspecified 265 nm

Nominal composition of Parakeldyshite [ Na₂ZrSi₂O₇ ].
Element	Atoms	At%	Wt%
Na	2	16.7	15.1
Zr	1	8.33	29.9
Si	2	16.7	18.4
O	7	58.3	36.7