...Toshihiro Kogure; Ritsuro Miyawaki; Yasuyuki Banno Abstract Wonesite, an interlayer-deficient trioctahedral sodium mica, has been investigated mainly by high-resolution transmission electron microscopy (HRTEM) and X-ray diffraction (XRD) using a Gandolficamera. The true structure of wonesite...

...David R. Veblen Abstract Transmission electron microscopy, electron diffraction, and X-ray analytical electron microscopy indicate that the sodium mica wonesite from the Post Pond Volcanics, Vermont, has partially exsolved to a lamellar intergrowth of talc and a sodium mica having fewer interlayer...

...David R. Veblen Abstract Macroscopically intergrown chlorite, wonesite (sodium trioctahedral mica), and potassium biotite from the Post Pond Volcanics, Vermont, have been studied with transmission electron microscopy and diffraction. The chlorite occurs in intergrown 1-layer and disordered...

... coexists with phlogopite, talc, chlorite, cordierite, gedrite, anthophyllite, quartz and plagioclase (An 10–30 ), and is thought to be a stable equilibrium phase under metamorphic conditions. The mineral has been given the name wonesite in honor of David R. Wones. Copyright © 1981 by the Mineralogical...

... micas with only limited substitution by Na ( Deer et al. , 1976 ; Guidotti, 1984 ). Indeed, reports of naturally occurring Na-rich trioctahedral micas are scarce, and most of these deal with Na-Mg micas (Na phlogopite, wonesite and preiswerkite), which were first described in a few rather unusual host...

... 2009 Kogure and co-workers have published several papers reporting the stacking structures of various 2:1 layer phyllosilicates ( e.g. aspidolite, Kogure et al. (2004 ); wonesite, Kogure et al. (2005) ; pyrophyllite, Kogure et al. (2006) ), mainly by using high-resolution transmission...

... phyllosilicates ( e.g. aspidolite, Kogure et al . ( 2004 ); wonesite, Kogure et al . ( 2005 ); pyrophyllite, Kogure et al . ( 2006 )), mainly by using high-resolution transmission electron microscopy (HR-TEM). However, there is ambiguity in wording that refers to the lateral displacement between two...

... and trioctahedral micas. Wonesite Biotite Biotite Element PU 3-6 PU 3-8 PU 3-9 PU3-15 PU3-24 PU4-8 PU4-12 PU4-15 PU 48-1 PU51-1 PU51-4 PU51-6 PU51-10 PU51-14 PU51-15 PU20-6 PU20-9 PU42-6 PU42-8 PU 42-9...

... in the interlayer-deficient Na-mica wonesite (Spear et al ., 1981 ). If the Ba-rich phlogopite of La Creuse is a single phase, it is an interesting case. Other a priori possibilities are an interstratified compound with talc layers (such compounds however have never been described) or a non-homogeneous...

... is the exsolution of talc in the Na-mica wonesite ( Veblen 1983a , 1983b ). Although the basal layers of both phases are aligned, the interfaces of the talc lamellae are inclined 37° to (001) and cut across all the layers. Such a microstructure allows easy diffusional mass-transfer between wonesite and talc along...

...- or divalent cations ( x ≈ 0.6–0.85) Interlayer-deficient mica Trioctahedral
 Dioctahedral Wonesite 3,4 
 none 4 Non-hydrated monovalent cations, x ≈ 0.85–1.0 for dioctahedral) True (flexible) mica Trioctahedral
 Dioctahedral Phlogopite, siderophyllite, aspidolite
 Muscovite, celadonite...

...) Interlayer-deficient mica Trioctahedral Wonesite 3,4 Dioctahedral none 4 Non-hydrated monovalent cations, (⩾50% monovalent, x ≈ 0.85–1.0 for dioctahedral) True (flexible) mica Trioctahedral Phlogopite, siderophyllite, aspidolite Dioctahedral Muscovite, celadonite, paragonite...