1-20 OF 74 RESULTS FOR

oxybiotite

Results shown limited to content with bounding coordinates.
Follow your search
Access your saved searches in your account

Would you like to receive an alert when new items match your search?
Close Modal
Sort by
Journal Article
Published: 01 March 2001
American Mineralogist (2001) 86 (3): 336–340.
...Toshihiro Kogure; Massimo Nespolo Abstract Atomic structures of planar defects found in oxybiotite from the Ruiz Peak ash flow, Jemez Mountains, New Mexico, were investigated using high-resolution transmission electron microscopy (HRTEM) and electron nano-beam chemical analyses. Two kinds of planar...
FIGURES | View All (7)
Journal Article
Published: 01 April 1982
American Mineralogist (1982) 67 (3-4): 298–310.
...Tsutomu Ohta; Hiroshi Takeda; Yoshio Takeuchi Abstract The crystal structures of coexisting 1 M and 2 M 1 oxybiotites were refined by the X-ray diffraction method in order to examine the role of hydrogen in mica structures and polytypism. The unit-layer structures of coexisting 1 M and 2 M 1...
Journal Article
Published: 01 December 2001
Clays and Clay Minerals (2001) 49 (6): 455–491.
... is increased, the sample first evolves along an annite–oxyannite join, until all H is lost via the oxybiotite reaction (Fe 2+ + OH − ⇌Fe 3+ + O 2− + H↑). It then evolves along an oxyannite–ferrioxyannite join, where ideal ferrioxyannite, KFe 3+ 8/3 □ 1/3 AlSi 3 O 12 , is defined as the product resulting from...
FIGURES | View All (21)
Image
HRTEM images of <span class="search-highlight">oxybiotite</span> recorded along (a) [100]&#x2F;[110]&#x2F;[11̅0] and (b) [0...
Published: 01 January 2002
Figure 22. HRTEM images of oxybiotite recorded along (a) [100]/[110]/[11̅0] and (b) [010]/[310]/[31̅0], which contain one planar defect (indicated by the arrowheads). The upper image is unfiltered and the lower is filtered. T, O and K at the bottom indicate the tetrahedral sheet, octahedral
Image
Low magnification image of <span class="search-highlight">oxybiotite</span> showing planar defects parallel to (0...
Published: 01 March 2001
F igure 1. Low magnification image of oxybiotite showing planar defects parallel to (001). Two kinds of defects (indicated as A and B) are observed.
Image
HRTEM images of <span class="search-highlight">oxybiotite</span> recorded along ( a ) [100]&#x2F;[110]&#x2F;[11̅0] and ( b ...
Published: 01 March 2001
F igure 2. HRTEM images of oxybiotite recorded along ( a ) [100]/[110]/[11̅0] and ( b ) [010]/[310]/[31̅0], which contain one type-A defect (indicated by the arrowheads). The upper image is raw and the lower one is filtered. T, O, and K at the bottom indicate the tetrahedral sheet, octahedral
Journal Article
Published: 01 February 2001
Clays and Clay Minerals (2001) 49 (1): 1–23.
..., especially those with complex stacking sequences. In addition, the M1 → M2 transformation is most probable in micas with an oxybiotitic composition, where the removal of the OH dipole strengthens the interlayer bonding and the presence of high-charge cations destabilizes the O sheet. Three examples...
FIGURES | View All (18)
Image
HRTEM image of the area containing several planar defects (indicated by the...
Published: 01 January 2002
Figure 21. HRTEM image of the area containing several planar defects (indicated by the arrow heads) in oxybiotite. The beam direction is along [010]/[310]/[31̅0] ( Kogure and Nespolo, 2001 ).
Journal Article
Published: 01 June 2020
American Mineralogist (2020) 105 (6): 932–944.
... the H 2 evolution, thus the higher the H 2 /H 2 O ratios. The products of ramp-heating to 1000 °C resulted in varying amounts of newly formed Fe 3+ (from 7 to 22%), however, biotite that converted into oxybiotite underwent almost complete oxidation, indicating a stronger tendency of 2:1 layer...
FIGURES | View All (7)
Journal Article
Published: 01 September 1965
American Mineralogist (1965) 50 (9): 1228–1272.
... KFe 3 2+ AlSi 2 O 10 (H ∞1 ), annite-KMg 3 2+ AlSi 3 O 10 (OH) 2 , phlogo-pite-KFe 3 3+ AlSi 3 O 12 (H -1 , “oxybiotite.” Application of regular solution theory to KFe 3 AlSi 3 O 10 (OH) 2 in ternary solid solution yields the following relationship: log f H 2 O = 3428 − 4212 ( 1 − x 1 ) 2 T + log x 1...
Image
Measured and calculated ratios of H contents (left scale)  vs.  the treatme...
Published: 01 December 2001
at these treatment temperatures. Filled squares represent total H relative to total H in the starting annite (H total /H as-is ) calculated from the ferric Fe populations measured by Mössbauer spectroscopy by assuming that the oxybiotite reaction acts alone. Filled diamonds represent the H present in the normal (N
Image
Chemical composition (dark bars) of the area that contains ( a ) one type-A...
Published: 01 March 2001
F igure 4. Chemical composition (dark bars) of the area that contains ( a ) one type-A defect and ( b ) one thicker type-B defect (shown in Fig. 6b ). The white bars indicate the composition of the normal oxybiotite areas. The electron probe diameter used is about 5 nm. Absolute values
Image
(facing page).  Photomicrographs of (a–c) altered feldspar and oxyhornblend...
Published: 01 April 2017
Figure 5 (facing page). Photomicrographs of (a–c) altered feldspar and oxyhornblende and oxybiotite in tuff viewed in planepolarized light (KBR-4); (d) altered plagioclase, rock fragment, volcanic glass, and opaque-mineral bearing tuffite viewed in planepolarized light (KRH-9); (e,f) volcanic
Image
Micas from Mt. Sassetto:  a  vs.  c  plot. Symbols for studied samples as i...
Published: 01 April 2007
oxybiotite” ( Ohta et al. 1982 ). Circled samples from the literature refer to samples 21, 22, and 23 of Cruciani and Zanazzi (1994) . Error bars are minor than symbol dimensions.
Image
Plot of micas MS7, MS8(1), and MS8(2) from Mt. Sassetto in the ternary syst...
Published: 01 April 2007
F igure 7. Plot of micas MS7, MS8(1), and MS8(2) from Mt. Sassetto in the ternary system KFe 3 2+ AlSi 3 O 10 (OH) 2 -KMg 3 2+ AlSi 3 O 10 (OH) 2 -KFe 3 3+ AlSi 3 O 12 (H –1 ). Star = Pines Peak “oxybiotite” ( Ohta et al. 1982 ). Dashed lines indicate compositions of “buffered” biotites
Image
Photomicrographs of: (a) foliated chlorite schist, under crossed polars (Tb...
Published: 01 March 2009
-filled microfracture network and degradation of feldspar and volcanite, under crossed polars (G66); (e) oxyhornblende and oxybiotite and lithic-schist-fragment-bearing siliceous bed units, under crossed polars (T3-11); and (f) a close-up view of (e) showing the relationship of Fe oxide-filling
Journal Article
Published: 01 January 2002
Reviews in Mineralogy and Geochemistry (2002) 46 (1): 281–312.
...Figure 22. HRTEM images of oxybiotite recorded along (a) [100]/[110]/[11̅0] and (b) [010]/[310]/[31̅0], which contain one planar defect (indicated by the arrowheads). The upper image is unfiltered and the lower is filtered. T, O and K at the bottom indicate the tetrahedral sheet, octahedral...
FIGURES | View All (25)
Journal Article
Published: 01 February 2012
American Mineralogist (2012) 97 (2-3): 430–439.
.... In several cases, 2 M 1 -micas have been reported as coexisting with 1 M -micas in the same rock sample. Takeda and Ross (1975) , analyzed 2 M 1 and 1 M igneous oxybiotite from Ruiz Peak (New Mexico), and concluded that the unit layer of the 2 M 1 polytype showed a shift of the upper and lower triads...
FIGURES | View All (8)
Journal Article
Published: 01 April 2007
American Mineralogist (2007) 92 (4): 468–480.
... “oxybiotite” ( Ohta et al. 1982 ). Circled samples from the literature refer to samples 21, 22, and 23 of Cruciani and Zanazzi (1994) . Error bars are minor than symbol dimensions. ...
FIGURES | View All (7)
Journal Article
Published: 01 November 2001
European Journal of Mineralogy (2001) 13 (6): 1025–1034.
... of the stacking sequence of oxybiotite by means of atomic-resolution images and Periodic Intensity Distribution (PID) . Acta Cryst ., B55 , 507 – 516 . Koval , P.V. , Joswig , W. , Sapozhnikov , A.N. ( 1988 ): Coexisting 3 T and 2 M 1 megacrysts of titanium oxybiotite in Thavaryn-Tsaram...
FIGURES