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tawmawite

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Change of n (upper part) and 2V Z  (lower part) in clinozoisite-<b>tawmawite</b> s...
Published: 02 January 2004
Figure 20. Change of n (upper part) and 2V Z (lower part) in clinozoisite-tawmawite solid solutions and the change in orientation of the optical axial plane; the diagram is not to scale due to the small number of data.
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Polarized room temperature spectra of a natural Cr 3+  epidote (“<b>tawmawite</b>”...
Published: 02 January 2004
Figure 6. Polarized room temperature spectra of a natural Cr 3+ epidote (“tawmawite”) and the corresponding energy level diagram. Redrawn and modified after Burns and Strens (1967) .
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Optical orientation of monoclinic clinozoisite-epidote (upper part), epidot...
Published: 02 January 2004
Figure 16. Optical orientation of monoclinic clinozoisite-epidote (upper part), epidote-piemontite (center), tawmawite and allanite (bottom); modified after Tröger 1982 .
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a. Classification of Tisovita–Iuti epidote-group minerals in a triangular d...
Published: 01 February 2009
, Taiwan (gabbros, veins in gabbros, rodingites) ( Liou & Ernst 1979 ). “Tawmawite” ( i.e. , Cr-rich epidote) is shown in quotation marks because it is not an IMA-approved name.
Journal Article
Published: 01 October 2011
European Journal of Mineralogy (2011) 23 (5): 731-743.
... within the sample. The major components of epidote-group minerals contributing to Cr- and V-rich clinozoisite from Outokumpu are Ca 2 Al 3 Si 3 O 12 (OH) (clinozoisite), Ca 2 Al 2 Cr 3+ Si 3 O 12 (OH) (“tawmawite”) and Ca 2 Al 2 V 3+ Si 3 O 12 (OH) (mukhinite). The individual site-specific cation...
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Journal Article
Published: 01 September 2006
European Journal of Mineralogy (2006) 18 (5): 551-567.
... octahedral M1 and M3 sites, different from just M3 in strontiopiemontite and piemontite. The name “tawmawite” was introduced by Bleeck (1907) in his description of jadeite deposits in Upper Burma (now Myanmar). Tawmaw was a major jadeite mining-district in this area at the beginning of the 20 th...
FIGURES
Journal Article
Published: 01 June 2010
The Canadian Mineralogist (2010) 48 (3): 523-536.
... enriched in V (up to 0.40 apfu ) and Cr (up to 0.42 apfu ). In some places, the Cr content is higher than Al at the M 3 site, but the disorder of Cr between M 1 and M 3 sites avoids classification of the mineral as “tawmawite” (see Armbruster et al . 2006 ). The content of V decreases to the rim...
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Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 1-81.
...Figure 20. Change of n (upper part) and 2V Z (lower part) in clinozoisite-tawmawite solid solutions and the change in orientation of the optical axial plane; the diagram is not to scale due to the small number of data. ...
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Series: Geological Society, London, Special Publications
Published: 01 January 2014
DOI: 10.1144/SP386.8
EISBN: 9781862396630
... 1.22 12.86 0.33 16.64 4.71 Calcsilicate hornfels DHZ 5 35.84 0.03 20.83 0.00 0.65 1.78 33.37 2.48 5.00 Uvarovite–tremolite–tawmawite–pyrrhotite rock DHZ 6 35.88 0.00 1.13 27.04 2.46 0.00 0.03 0.04 33.31 We used Pascal computer programs to input the data...
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Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 125-170.
...Figure 6. Polarized room temperature spectra of a natural Cr 3+ epidote (“tawmawite”) and the corresponding energy level diagram. Redrawn and modified after Burns and Strens (1967) . ...
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Journal Article
Published: 01 January 2008
American Mineralogist (2008) 93 (1): 63-73.
... (0.713 Cr apfu, Table 2 ) indicates the presence of a Cr-dominant member in the M3 position (Fig. 7 ). However, preliminary structural results for Cr-rich clinozoisite or epidote (called “tawmawite”), from Outokumpu, Finnland, indicate that Cr is disordered over the M3 and M1 positions. This finding...
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Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 301-345.
... the epidote as pale-yellow to pale-green euhedral crystals up to 0.5 mm, but sometimes as large as 2 mm, exhibiting both sector and oscillatory zoning and containing up to 15.4 wt% Cr 2 O 3 . This composition is close to the theoretical Cr end-member (tawmawite, X Cr33 ) of the clinozoisite-epidote series...
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Journal Article
Published: 01 October 2009
American Mineralogist (2009) 94 (10): 1351-1360.
... “tawmawite” was proposed years ago for Cr 3+ -analog of epidote ( Bleeck 1907 ). However, its composition does not show epidote-group stoichiometry, and no epidote-group mineral with Cr > 0.5 atoms per formula unit (apfu) at M3 has been confirmed. Thus, it is not considered as a valid species name...
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Journal Article
Published: 01 February 2009
The Canadian Mineralogist (2009) 47 (1): 81-105.
..., Taiwan (gabbros, veins in gabbros, rodingites) ( Liou & Ernst 1979 ). “Tawmawite” ( i.e. , Cr-rich epidote) is shown in quotation marks because it is not an IMA-approved name. ...
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Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 431-493.
.... From the same area, Treolar (1987) reported epidote with > 15 wt% Cr 2 O 3 , i.e., close to the endmember tawmawite, Ca 2 CrAl 2 Si 3 O 11 O(OH). Thus, there appears to be at least limited solid solution between tawmawite and dissakisite, via the substitution Chromian dissakisite-(Ce...
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Journal Article
Published: 02 January 2004
Reviews in Mineralogy and Geochemistry (2004) 56 (1): 553-605.
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