Distinct domains in "guarinite" from monte somma, Italy: Microstructural hrtem evidence

Alessandro Genovese; Marcello Mellini; Stefano Merlino

doi:10.3749/canmin.50.2.549

Distinct domains in "guarinite" from monte somma, Italy: Microstructural hrtem evidence

Alessandro Genovese^*, Marcello Mellini, Stefano Merlino

^*Corresponding author for this work

Research output: Contribution to journal › Article › peer-review

Abstract

Guarinite" crystals, of composition Na _1.56Ca _11.13Zr _2.33Nb _0.07Mn _0.51Fe _0.40(Si ₂O ₇) ₄(O _3.31F _4.69), show extensive defective microstructural arrangements, deriving from the presence of domains with different unit-cells. The structural complexity of "guarinite" results from the variable arrangements of simple structural building units (i.e., Si ₂O ₇ groups), possibly shifted by c/2 within the framework of octahedra. Actually, [100] and [010] images acquired with a transmission electron microscope reveal ubiquitous lamellar microstructures. Interlocked irregular domains characterize the [001] projection.

Original language	English (US)
Pages (from-to)	549-557
Number of pages	9
Journal	Canadian Mineralogist
Volume	50
Issue number	2
DOIs	https://doi.org/10.3749/canmin.50.2.549
State	Published - Apr 2012
Externally published	Yes

Keywords

Guarinite
High-resolution transmission electron microscopy
Microstructure
Modulation
Twinning

ASJC Scopus subject areas

Geochemistry and Petrology

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10.3749/canmin.50.2.549

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abstract = "Guarinite{"} crystals, of composition Na 1.56Ca 11.13Zr 2.33Nb 0.07Mn 0.51Fe 0.40(Si 2O 7) 4(O 3.31F 4.69), show extensive defective microstructural arrangements, deriving from the presence of domains with different unit-cells. The structural complexity of {"}guarinite{"} results from the variable arrangements of simple structural building units (i.e., Si 2O 7 groups), possibly shifted by c/2 within the framework of octahedra. Actually, [100] and [010] images acquired with a transmission electron microscope reveal ubiquitous lamellar microstructures. Interlocked irregular domains characterize the [001] projection.",

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T1 - Distinct domains in "guarinite" from monte somma, Italy

T2 - Microstructural hrtem evidence

AU - Genovese, Alessandro

AU - Mellini, Marcello

AU - Merlino, Stefano

PY - 2012/4

Y1 - 2012/4

N2 - Guarinite" crystals, of composition Na 1.56Ca 11.13Zr 2.33Nb 0.07Mn 0.51Fe 0.40(Si 2O 7) 4(O 3.31F 4.69), show extensive defective microstructural arrangements, deriving from the presence of domains with different unit-cells. The structural complexity of "guarinite" results from the variable arrangements of simple structural building units (i.e., Si 2O 7 groups), possibly shifted by c/2 within the framework of octahedra. Actually, [100] and [010] images acquired with a transmission electron microscope reveal ubiquitous lamellar microstructures. Interlocked irregular domains characterize the [001] projection.

AB - Guarinite" crystals, of composition Na 1.56Ca 11.13Zr 2.33Nb 0.07Mn 0.51Fe 0.40(Si 2O 7) 4(O 3.31F 4.69), show extensive defective microstructural arrangements, deriving from the presence of domains with different unit-cells. The structural complexity of "guarinite" results from the variable arrangements of simple structural building units (i.e., Si 2O 7 groups), possibly shifted by c/2 within the framework of octahedra. Actually, [100] and [010] images acquired with a transmission electron microscope reveal ubiquitous lamellar microstructures. Interlocked irregular domains characterize the [001] projection.

KW - Guarinite

KW - High-resolution transmission electron microscopy

KW - Microstructure

KW - Modulation

KW - Twinning

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Distinct domains in "guarinite" from monte somma, Italy: Microstructural hrtem evidence

Abstract

Keywords

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