Laser Raman Spectroscopy analyses show that part of the K-feldspar grains within these inclusions contains K-cymrite, a UHP phase of K-feldspar. This result indicates that (1) K-feldspar grains within these inclusions are polymorph after K-cymrite; and (2) K-feldspar-bearing inclusions in ...
K-cymritekokchetavitesingle-crystal X?ray diffractionRaman spectroscopyWe determined for the first time the crystal structures of high-pressure K-cymrite (KAlSi3O8H2O) and its dehydrated form kokchetavite (KAlSi3O8) using single-crystal X-ray diffraction. The K-cymrite structure has been ...
After pressure release, K-cymrite reverts to initial non-modulated single-crystal state. The parameters of third-order Birch-Murnaghan equation of state for K-cymrite are V 0 =190.45(12) , K 0 =56.5(7) GPa and K 0 ' = 3.2(12), with bulk modulus notably deviating from earlier ...
Having H2O molecules in the cage of double Al,Si tetrahedral sheets, K-cymrite (KAlSi3O8.H2O) could be the reservoir of H2O for subducted quartzofeldsparthic crust, though yet to be found on the earth. This paper reports the discovery of micrometer-size anhydrous K-cymrite in ...
Fasshauer DW, Chatterjee ND, Marler B (1997) Synthesis, structure, thermodynamic properties and stability relations of K- cymrite, KAlSi 3Os-H 20. Phys Chem Minerals 24:455-462.Fasshauer DW, Chatterjee ND, Marler B (1997) Synthesis, structure, thermodynamic properties and stability relations...
Crystal structures of K-cymrite and kokchetavite from single-crystal X-ray diffractiondoi:10.2138/am-2020-7407Alexandr V. RomanenkoSergey V. RashchenkoAlexander G. SokolAndrey V. KorsakovYurii V. SeryotkinKonstantin V. GlazyrinKira Musiyachenko...
K‐cymrite is a potential carrier of nitrogen; it can store and transport up to 4 wt% of nitrogen in the deep mantle, thus contributing to the global nitrogen cycle. The stability of nitrogen‐bearing K‐cymrite synthesized at pressure of 6.3 GPa, upon exhumation to the Earth''s surface...
PREPUBLICATION: Characteristics and formation processes of (Ba, 1 K, NH4)-feldspar and cymrite from a lower Cambrian black shale sequence in Anhui Province, South ChinaBa-poor K-feldsparBa-rich K-feldsparcymritemineral characteristicsmineral formation processes...