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hydrogarnet

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Journal Article
Published: 01 July 2017
American Mineralogist (2017) 102 (7): 1402-1417.
... + = H + , Na, K, Li), can occur at the expense of the OH – group coordinating one of the four tetrahedral Si 4+ nearest to the Al 3+ tetrahedron. The most significant feature of the North Sea nano-quartz deduced in the present investigation is the presence of [4H] Si defects, also known as hydrogarnet...
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Journal Article
Published: 01 December 2016
European Journal of Mineralogy (2016) 28 (5): 931-941.
...Taras L. Panikorovskii; Sergey V. Krivovichev; Evgeny V. Galuskin; Vladimir V Shilovskikh; Anton S. Mazur; Ayya V. Bazai Abstract Single crystals of Si-deficient vesuvianite with significant degree of hydrogarnet-type (SiO 4 ) 4− –(O 4 H 4 ) 4− substitution occur as epitactic overgrowth...
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Journal Article
Journal: Lithosphere
Published: 01 August 2016
Lithosphere (2016) 8 (4): 386-395.
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Journal Article
Published: 01 March 2016
The Canadian Mineralogist (2016) 54 (2): 429-452.
... 2016 © 2016 Mineralogical Association of Canada 2016 metamorphic-hydrothermal Ag-bornite Ag-paolovite argentopentlandite cassiterite chalcopyrite–lenaite Hg-silver mackinawite palladoarsenide parkerite Pd-breithauptite Sb-free paolovite silver Sn-hydrogarnet vincentite...
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Journal Article
Published: 01 October 2015
Mineralogical Magazine (2015) 79 (5): 1231-1244.
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Journal Article
Published: 01 November 2014
American Mineralogist (2014) 99 (11-12): 2272-2279.
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Journal Article
Published: 01 August 2013
The Canadian Mineralogist (2013) 51 (4): 597-612.
...-group mineral containing elevated concentrations of Nb (0.20 apfu , 13.33 wt.% Nb 2 O 5 ) and Ti (0.19 apfu Ti, 7.41 wt.% TiO 2 ), and evidence for the (SiO 4 ) 4− ↔ (OH) 4 4− “hydrogarnet” substitution. The crystal structure was solved and refined to R = 3.40% and wR 2 = 9.73% for 68 reflections with F...
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Journal Article
Published: 01 June 2013
The Canadian Mineralogist (2013) 51 (3): 359-375.
..., crystallographic, and physical data. In many cases, the crystals of gehlenite from the exoskarn are embedded and partially engulfed by vesuvianite or hydrogarnet ( Fig. 1C ) as a result of a late stage metasomatic event ( Marincea et al . 2001 ). As shown by Marincea et al . (2001) and Pascal et al...
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Journal Article
Published: 01 October 2011
Mineralogical Magazine (2011) 75 (5): 2563-2572.
... 1 , analyses 8 and 9). Rarely, megawite occurs as rims up to 5 μm thick on Sn-rich lakargiite crystals in the highly altered parts of the chegemite-bearing skarns which contain hydrogarnet and ettringite ( Fig. 1 e ). The megawite composition approaches the boundary with lakargiite (CaSnO 3 ≈ 50...
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Journal Article
Published: 01 April 2009
American Mineralogist (2009) 94 (4): 648-652.
Journal Article
Published: 01 August 2008
The Canadian Mineralogist (2008) 46 (4): 1033-1042.
... that evolution of calcic garnets in some carbonatites culminates with the appearance of a “hydrogarnet” late in the paragenetic sequence ( Chakhmouradian & Zaitsev 2002 ). Such garnet, containing a significant proportion of OH in its chemical composition, precipitates from deuteric hydrothermal fluids either...
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Journal Article
Published: 01 June 2008
The Canadian Mineralogist (2008) 46 (3): 569-581.
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Journal Article
Published: 01 April 2007
The Canadian Mineralogist (2007) 45 (2): 239-248.
... at the tetrahedral site are associated with increased Z (1)–O and Z (2)–O distances, 1.687 and 1.660 Å, respectively. Vacancies and increased Z (1)–O and Z (2)–O bond lengths are consistent with hydrogarnet-type defects, where SiO 4 is replaced by H 4 O 4 tetrahedra. The single crystal investigated shows...
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Journal Article
Published: 01 March 2005
European Journal of Mineralogy (2005) 17 (2): 375-382.
...Ulf HÅLENIUS; Ulrich HÄUSSERMANN; Hans HARRYSON Abstract A new tetragonal hydrogarnet from Wessels Mine, South Africa is described. The mineral occurs in a calc-silicate skarn together with Mn-rich vesuvianite, calcite and henritermierite. It is the Al-dominant analogue of henritermierite, Ca 3...
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Journal Article
Published: 01 March 2003
European Journal of Mineralogy (2003) 15 (2): 419-426.
...-chemical data, the physical properties, and the structure refinement of this new member of the Ca 3 Al 2 (SiO 4 ) 3 -Ca 3 Al 2 (O 4 H 4 ) 3 series indicate the presence of about 37% grossular. The positional disorder of the oxygen atom, a peculiar feature of the hydrogarnet structure, is described here...
FIGURES
Journal Article
Published: 01 February 2003
The Canadian Mineralogist (2003) 41 (1): 161-170.
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Journal Article
Published: 01 March 2000
American Mineralogist (2000) 85 (3-4): 570-577.
... with the similarity of the structures of vesuvianite and garnet suggest a partial hydrogarnet-like substitution of SiO 4 tetrahedra by H 4 O 4 . * E-mail: armbruster@krist.unibe.ch 20 10 1999 08 06 1999 © 2000 American Mineralogist 2000 Vesuvianites are commonly classified among...
FIGURES
Journal Article
Published: 01 October 1998
European Journal of Mineralogy (1998) 10 (5): 907-921.
Journal Article
Published: 01 June 1998
Mineralogical Magazine (1998) 62 (3): 381-386.
Journal Article
Published: 01 December 1997
American Mineralogist (1997) 82 (11-12): 1241-1254.