Redefinition and crystal chemistry of samarskite-(Y), YFe3+Nb2O8: cation-ordered niobate structurally related to layered double tungstates

SN Britvin, IV Pekov, MG Krzhizhanovskaya… - Physics and Chemistry …, 2019 - Springer
Abstract Samarskite-(Y), the mineral known for almost 180 years only in metamict (X-ray
amorphous) state, was found as non-metamict crystals in sanidinites of the Laach Lake …

[PDF][PDF] Metamict Fergusonite from Kolonna and Masimbula, Sri Lanka

A Erlacher, M Zeug, R SK0DA… - Journal of the …, 2021 - researchgate.net
Two radioactive mineral specimens (with compositions Th02 2.9--4.6 wt% and U02 5.8-7.8
wt%, respectively), collected from a placer deposit near Kolonna and a quarry near …

[PDF][PDF] Природные и синтетические оксидные фазы с f-элементами: рекристаллизация, кристаллохимия и свойства

ОИ Сийдра - 2024 - disser.spbu.ru
Работа выполнена под руководством доктора геолого-минералогических наук Олега
Иоханнесовича Сийдры (профессор кафедры кристаллографии, Институт наук о …

[PDF][PDF] Natural and synthetic oxide phases with f-elements: recrystallization, crystal chemistry and properties

C Ruiqi - 2024 - disser.spbu.ru
The work was carried out under the supervision of Dr. Oleg Iohannesovich Siidra (Professor,
Department of Crystallography, St. Petersburg State University) and Dr. Marie Colmont …

[PDF][PDF] Metamict Gadolinite–(Y) from Ratnapura, Sri Lanka

L Nasdala, C Hauzenberger, M Wildner, C Chanmuang… - researchgate.net
A fairly large (ca. 15 cm), massive glassy specimen of nearly black bulk colour, found in
Ratnapura district, was identified as metamict gadolinite–(Y) based on its chemical …

[PDF][PDF] Preliminary results of Fe Mössbauer spectroscopy of metamict samarskite after one-hour high temperature annealing in argon

D Malczewski, A Grabias - Nukleonika, 2017 - sciendo.com
The preliminary results of 57Fe Mössbauer spectroscopy and X-ray diffraction (XRD) of fully
metamict samarskite dated at~ 1500 Ma, which absorbed α-dose of 6.5× 1017 α-decay mg …