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parsettensite

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Journal Article
Published: 01 June 1994
American Mineralogist (1994) 79 (5-6): 426–437.
...R. A. Eggleton; Stephen Guggenheim Abstract The crystal structure of parsettensite, approximately M 7.5 + ( Mn,Mg ) 49 ( Si 64.5 , Al 7.5 ) Σ = 72 O 168 - ( OH ) 50 ⋅ n H 2 O where M + is an exchangeable cation such as K, Na, or Ca, was solved by trial-and-error methods based on high-resolution...
Journal Article
Published: 01 June 1994
American Mineralogist (1994) 79 (5-6): 438–442.
...Stephen Guggenheim; R. A. Eggleton Abstract Structural models for the islandlike modulated phyllosilicates, stilpnomelane and parsettensite, were examined by distance least-squares (DLS) calculations. Parsettensite occurs naturally only near the Mn end-member, whereas stilpnomelane may be both Mn...
Image
Misfit layered silicates with very complex structures: octahedral-tetrahedr...
Published: 01 April 2013
F ig . 10. Misfit layered silicates with very complex structures: octahedral-tetrahedral frameworks in ( a ) stilpnomelane, ( c ) parsettensite, ( e ) antigorite ( m = 17 polysome) and ( g ) bannisterite; projections of their tetrahedral sheets are shown in ( b , d , f , h ), respectively.
Image
Double-layer sheets of tetrahedra based on miscellaneous complex 3-connecte...
Published: 01 February 2019
; and ( c ) the (4.5.12) 24 (5.6 2 ) 12 (6 3 ) 12 (5.6.12) 24 net and sheet in parsettensite.
Journal Article
Published: 01 April 2013
Mineralogical Magazine (2013) 77 (3): 275–326.
...F ig . 10. Misfit layered silicates with very complex structures: octahedral-tetrahedral frameworks in ( a ) stilpnomelane, ( c ) parsettensite, ( e ) antigorite ( m = 17 polysome) and ( g ) bannisterite; projections of their tetrahedral sheets are shown in ( b , d , f , h ), respectively. ...
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Journal Article
Published: 01 March 2000
European Journal of Mineralogy (2000) 12 (2): 341–356.
... centimetric to decimetric reaction rims in the wall rock, where the braunite + quartz assemblage is replaced by Mn silicates (mainly bementite, johannsenite, parsettensite and rhodonite) and carbonates (mainly Mn-bearing calcite and rhodochrosite) with a zoned distribution. Mineral zoning points to an early...
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Journal Article
Published: 01 October 1996
American Mineralogist (1996) 81 (9-10): 1270–1276.
... ± parsettensite ± saneroite ± pyrobelonite veinlets. Only a small amount of very minute, tabular, (O1O)-flattened fianelite crystals have been collected. Fianelite, with ideal formula Mn 2 V(V,As)O 7 ·2H 2 O, crystallizes in the P2 1 /n space group with a = 7.809(2), b = 14.554(4), c = 6.705(4) Å and β = 93.27(3...
Journal Article
Published: 01 April 1990
American Mineralogist (1990) 75 (3-4): 409–414.
... > ν ; X ≃ b , Y ≃ [100], Z ≃ c . Lithiomarsturite occurs at the Foote mine in North Carolina as 1- to 3-mm-diameter euhedral crystals (forms {100}, {010}, and {001}) in vugs in pegmatite with albite, fluorapatite, bavenite, brannockite, parsettensite, and tetrawick-manite crystals. Copyright © 1990...
Journal Article
Published: 01 August 1987
American Mineralogist (1987) 72 (7-8): 724–738.
... is more complex, most closely approximates islandlike structures. The plot involving cation radii is useful as a predictive tool to identify modulated structures, and parasettensite and gonyerite are identified as possible new members of the group. Diffraction data suggest that parsettensite has...
Journal Article
Published: 01 May 1984
The Canadian Mineralogist (1984) 22 (2): 259–263.
... for a Mn-dominant stilpnomelane from Franklin, tentatively assumed to be parsettensite. The composition of a ferristilpnomelane from Franklin is also presented.--Modified journal abstract. © 1984 Mineralogical Association of Canada 1984 ...
Journal Article
Published: 01 February 1982
American Mineralogist (1982) 67 (1-2): 85–89.
.... The veinlets also contain quartz, manganiferous calcite, parsettensite and albite. Medaite is optically biaxial, positive, α = 1.77(1), β = 1.78(1), γ = 1.80(1), 2V γ = 71° (calc.), faintly pleochroic (dark to clear orange). The theoretical formula, derived from a crystal structure determination is Mn 6 [VSi 5...
Journal Article
Published: 01 October 1980
American Mineralogist (1980) 65 (9-10): 947–952.
..., manganiferous calcite, parsettensite, albite, and at least one other new mineral related to tiragalloite but containing essential vanadium instead of arsenic. Tiragalloite is optically biaxial, positive, α = 1.745(5), β = 1.751(3), γ = 1.760(5), 2 V γ = 38–46°, non-pleochroic. The theoretical formula, derived...
Journal Article
Published: 01 January 2018
European Journal of Mineralogy (2018) 30 (1): 177–182.
..., Hrm, Cal, Rds, Hem, Cct, sursassite, bementite, parsettensite, Mn oxides Pelloux (1935) ; Sanero (1936) ; Cortesogno et al. (1979) ; Marchesini & Pagano (2001) Kamys deposit, Atasuysk area, central Kazakhstan (“severginite” I) Cal, friedelite Kayupova (1961) Matsukabu deposit...
FIGURES
Journal Article
Published: 01 February 2007
American Mineralogist (2007) 92 (2-3): 416–423.
... or 1:1 layers) Mn phyllosilicates, whereas Figure 4 shows two-dimensional graphs of tetrahedral sheets in pyrosmalite, parsettensite, varennesite, tamaite, bannisterite, and intersilite. Nodes symbolize Si centers, and an edge between two nodes corresponds to common O atoms between two corresponding...
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Journal Article
Published: 01 December 2014
Mineralogical Magazine (2014) 78 (7): 1613–1627.
... to determine the crystal structure of a modulated phyllosilicate: Parsettensite . American Mineralogist , 79 , 426 – 437 . Finger L.W. Kroeker M. Toby B.H. ( 2007 ) DRAWxtl , an open-source computer program to produce crystal structure drawings . Journal of Applied Crystallography...
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Journal Article
Published: 01 February 2002
The Canadian Mineralogist (2002) 40 (1): 247–254.
... radiating aggregates (up to 5 mm in diameter) and aggregates of parallel needles (up to 2 mm thick). Occurrence : In manganese ore consisting of braunite, rhodonite, spessartine, tinzenite, parsettensite, sursassite and strontian piemontite in radiolarites. Associated minerals are: quartz, sursassite...
FIGURES
Journal Article
Published: 01 February 2019
Mineralogical Magazine (2019) 83 (1): 3–55.
... ; and ( c ) the (4.5.12) 24 (5.6 2 ) 12 (6 3 ) 12 (5.6.12) 24 net and sheet in parsettensite. ...
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Journal Article
Published: 01 April 2006
American Mineralogist (2006) 91 (4): 584–588.
... stage induced brittle deformation. These mineral assemblages were thus altered and progressively replaced. Caryopilite, inesite, parsettensite, neotocite, ranciéite, manganite, rhodochrosite, and manganoan calcite are the main replacing phases whereas pyrolusite, barian phillipsite, K-feldspar, calcite...
FIGURES
Journal Article
Published: 01 October 2000
The Canadian Mineralogist (2000) 38 (5): 1125–1136.
... along a rhodonite – bementite [(Mn 8 Si 6 O 15 )(OH) 10 ] line. This result confirms the presence of hydrated Mn silicates, such as parsettensite [(K,Na,Ca)(Mn,Al) 7 SiO 8 O 20 (OH) 8 ,2H 2 O], determined by X-ray diffraction, and illustrates the transformation of rhodonite according to the possible...
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Journal Article
Published: 01 August 2003
American Mineralogist (2003) 88 (8-9): 1324–1330.
..., parsettensite, and ganophyllite, are widespread in the deposit. The occurrence of euhedral crystals of ganophyllite-group phases is quite uncommon, and the specimens that are the subject of this study come from a unique find in 1986 at the now-closed Molinello mine. In that mine, the purported ganophyllite...
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