Results 101 to 110 of about 4,092 (217)

A mineralogical perspective on the granite alkali feldspar megacrysts paradox

Alkali feldspar megacrysts (commonly named K-feldspar) are a distinctive feature of many plutonic rocks. Yet, there is still no consensus on their origin.
Casini L., Idini A., Cuccuru S., Ferrero S., Fancello D., Mameli P.   +5 more
core   +1 more source

Alkali ion migration in albite and K-feldspar

, 2004
As part of a study of ion migration mechanisms in feldspars, the dynamical behaviour of the alkali metal cations ions in albite and K-feldspar has been investigated using a combination of dielectric spectroscopy and atomistic computer simulation ...
Palmer, D., Jones, A., Islam, M.S., Mortimer, M.   +3 more
core   +1 more source

Geochemical reactions initiated by subglacial abrasion of natural quartz and alkali feldspar

Frontiers in Earth Science
The role of subglacial abrasion in sustaining subglacial microbiomes is an area of growing interest. It is likely that subglacial abrasion produces a range of bio-utilisable compounds, some released from fluid inclusions in the confines of the mineral ...
Beatriz Gill-Olivas, Jon Telling, Martyn Tranter   +2 more
doaj   +1 more source

Sodium diffusion in alkali feldspars: towards the impact of Al/Si ordering

Philosophical Magazine
Tracer diffusion of Na in natural alkali feldspars including sanidine, adularia and orthoclase with different Na:K ratios, minor element contents and different degrees of Al/Si ordering is investigated using the radiotracer technique employing 22Na as the radioisotope. In adularia, the tracer diffusion measurements along the crystallographic directions
Tas, Bengü, Gorfer, Alexander, Petrishcheva, Elena, Wilde, Gerhard, Abart, Rainer, Divinski, Sergiy   +5 more
openaire   +1 more source

Alkali feldspar microtextures as provenance indicators in siliciclastic rocks and their role in feldspar dissolution during transport and diagenesis

, 2005
Alkali feldspars usually exhibit optical or sub-optical intergrowths of albite and K-feldspar (known generically as perthite) which have morphologies and crystallographic characteristics that are distinctive of the igneous or metamorphic environment in ...
Parsons, I, Lee, MR, Thompson, P, Lee, M R, Thompson, Pauline, Cayzer, N   +5 more
core   +1 more source

Alkali-silica glassy matrixes (AGM ) as replacement for feldspar in conventional porcelain compositions

, 2010
The effect of alkali-silica glassy matrixes (AGM), as replacement for feldspar, on the microstructure, physical properties and mechanical strength of conventional porcelain has been studied.
LEONELLI, Cristina, U. C. Melo, BOCCACCINI, Dino Norberto, KAMSEU, Elie, VERONESI, Paolo, D. Njopwouo, V. M. Sglavo   +6 more
core  

3D Model of Muscovite and Alkali Feldspar (Cod. CL-001-078-2-444)

, 2021
CÓDIGO DE LA PIEZA: CL-001-078-2-444 CATEGORÍA: Elemento Mineralógico CLASIFICACIÓN: Moscovita y Feldespato Alcalino ADQUISICIÓN: Donación FECHA DE REGISTRO: 22-09-2022ITEM CODE: CL-001-078-2-444 CATEGORY: Mineralogical Element CLASSIFICATION ...
Gómez Cruz, Arley de Jesús, Ríos Cardona, John Jairo, Quiceno Colorado, July, Marín Rámirez, Lina Marcela   +3 more
core  

Laboratory study of interactions between biomass ash and alkali-feldspar bed material

, 2021
Bed material reactivity and lifetime are dependent on the materials’ interactions with biomass ash. Literature on reactions between feldspar and ash elements is scarce, as it is a relatively new bed material and therefore less established.
Knutsson, Pavleta,, Faust, Robin,
core   +1 more source

Origin of felsic granulite microstructure by heterogeneous decomposition of alkali feldspar and extreme weakening of orogenic lower crust during the Variscan orogeny

, 2010
International audienceThis study answers the question of origin and evolution of a granulitic microstructure typically developed in felsic granulites of the European Variscan belt.
Tycová,, P, Franěk,, J, P. TÝCOVÁ, Schulmann, Karel, Franek, J., Haloda, J., Lexa, O., P. ŠTÍPSKÁ, Tycova, P., Lexa,, O, J. HALODA, Štípská, P., O. LEXA, Ulrich,, S, K. SCHULMANN, S. ULRICH, Ulrich, Stanislav, Haloda,, J, J. FRANĚK   +18 more
core   +1 more source

Multicomponent diffusion in ionic crystals: theoretical model and application to combined tracer- and interdiffusion in alkali feldspar. [PDF]

Phys Chem Miner, 2020
Petrishcheva E, Tiede L, Heuser D, Hutter H, Giester G, Abart R.   +5 more
europepmc   +1 more source