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franciscanite

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Journal Article
Published: 01 December 1986
American Mineralogist (1986) 71 (11-12): 1522-1526.
...Pete J. Dunn; Donald R. Peacor; Richard C. Erd; Robert A. Ramik Abstract Franciscanite and 6rebroite are new mineral species isotypic with welinite. Franciscanite, ideally Mn 6 [V,□] 2 Si 2 (0,0H) ~l4 , is hexagonal, has space group P 3, with a = 8.148(1) and c = 4.804(1) Å, V = 276.2 Å 3 , Z = 1...
Journal Article
Published: 01 September 2018
The Canadian Mineralogist (2018) 56 (5): 799-809.
.... The structure determination for barwoodite ( R 1 = 0.0246 for 746 reflections with I o > 2σ I ) shows it to be isostructural with welinite, franciscanite, and örebroite. Together, these four minerals comprise the welinite group. Abstract The new mineral barwoodite (IMA2017-046), Mn 2+ 6 (Nb 5+ ,□) 2 (SiO 4...
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Comparison of Raman spectra of barwoodite and <b>franciscanite</b>.
Published: 01 September 2018
Fig. 3. Comparison of Raman spectra of barwoodite and franciscanite.
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COMPARISON OF BARWOODITE WITH <b>FRANCISCANITE</b>, OREBROITE, AND WELINITE
Published: 01 September 2018
TABLE 8. COMPARISON OF BARWOODITE WITH FRANCISCANITE, OREBROITE, AND WELINITE
Journal Article
Published: 01 October 2013
American Mineralogist (2013) 98 (10): 1693-1696.
... and tetrahedra stacked along the c direction. Comparative data are given in Table 3 . These structures are the most complicated of a family of minerals based on dominantly close-packed layers ( Wuensch 1968 ), including arakiite ( Cooper and Hawthorne 1999 ), dixenite ( Araki and Moore 1981 ), franciscanite...
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Journal Article
Published: 01 November 2001
American Mineralogist (2001) 86 (11-12): 1494-1505.
... , 1471 –1482. Dunn, P.J. and Nelen, J.A. ( 1980 ) Kraisslite and mcgovernite: new chemical data. American Mineralogist , 65 , 957 –960. Dunn, P.J., Peacor, D.R., Erd, R.C., and Ramik, R.A. ( 1986 ) Franciscanite and örebroite, two minerals from California and Sweden, related to redefined...
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Journal Article
Published: 01 October 2018
Mineralogical Magazine (2018) 82 (5): 1101-1118.
... direction. These structures are the most complicated of a family of minerals based on dominantly close-packed layers (Wuensch, 1968 ), including arakiite (Cooper and Hawthorne, 1999 ), dixenite (Araki and Moore, 1981 ), franciscanite (Pertlik, 1986 ), hematolite (Moore and Araki, 1978 ), kraisslite...
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Journal Article
Published: 01 June 2018
Mineralogical Magazine (2018) 82 (3): 779-785.
... currently includes four mineral species, all of them having M 2 = Mn 2+ : welinite ( M 1 = W 6+ □), franciscanite ( M 1 = V 5+ □), örebroite ( M 1 = Sb 5+ Fe 3+ ), and barwoodite ( M 1 = Nb 5+ □). a  = 10.1273(9), b  = 10.1193(8), c  = 21.112(2) Å, β = 102.272(8)° 10.33(100), 7.04(18), 6.33...
Journal Article
Published: 01 May 2018
European Journal of Mineralogy (2018) 30 (3): 647-652.
... mineral species, all of them having M 2 = Mn 2+ : welinite ( M 1 = W 6+ □), franciscanite ( M 1 = V 5+ □), örebroite ( M 1 = Sb 5+ Fe 3+ ), and barwoodite ( M 1 = Nb 5+ □). Currently the IMA List of Minerals includes as valid species the following three minerals, all with G (= grandfathered...
Journal Article
Published: 28 February 2017
European Journal of Mineralogy (2017) 29 (5): 897-905.
... Minerals 47 33 42 Dunn et al., 1986 Dunn P.J. Peacor D.R. Erd R.C. Ramik R.A. 1986 Franciscanite and örebroite, two new minerals from California and Sweden, related to redefined welinite Am. Mineral. 71 1522 1526 Geijer, 1921 Geijer P. 1921 The cerium minerals...
FIGURES