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 ...
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 ...
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 ...
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 ...
For the first time, phase assemblage with phengite and K-cymrite (±kokchetavite) was obtained in the pelite and schist samples at 7.8 GPa and 1070°C. The assemblage was identified using Raman mapping. At stepwise devolatilization (with removal of fluid–melt portion forming in equilibrium ...
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...
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...
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...
Synthesis, structure, thermodynamic properties, and stability relations of K-cymrite, K[AlSi3O8]·H2O[J] 1997,Physics and Chemistry of Minerals(6):455～462Fasshauer, D.W., Chatterjee, N.D. and Marler, B. (1997) Synthesis, structure, thermodynamic properties, and stability relations of K...