Ferro-katophorite is a mineral with formula of NaNaCa[Fe 2+ 4 Al](Si 7 Al)O 22 (OH) 2 or Na(NaCa)(Fe 2+ 4 Al)(Si 7 Al)O 22 (OH) 2. The corresponding IMA (International Mineralogical Association) number is IMA2012 s.p.. The IMA symbol is Foktp. RRUFF Project. 1 Synonyms. Ferro-katophorite ; Foktp ;
Katophorite is usually black, dark greenish bluish or black black colored with vitreous luster and usually opaque but are often transparent to translucent in thin slivers.
Found in basic alkaline igneous rocks and in blueschist facies jadeitites. Forms a series with magnesiokatophorite. La Tabatiere, PQ, Canada and the Christiania region, Norway. Link …
Katophorite has the ideal formula A Na B (NaCa) C (Mg 4 Al) T (Si 7 Al)O 22 W (OH) 2 (Hawthorne et al., 2012). No published analyses of amphiboles fall in the katophorite compositional field ...
The katophorite minerals are sodium-calcium amphiboles defined with A (Na+K+2Ca)> 0.5 apfu and 0.5 apfu < Z (Al+Fe 3+ +2Ti) < 1.5 apfu. The individual minerals are defined by the dominant elements in the A, Z ( = IMA C position) and the dominant (OH),F and Clion.
Katophorite Na[NaCa][(Fe2+;Mg)4Al](Si7Al)O22(OH)2 °c 2001 Mineral Data Publishing, version 1.2 Crystal Data: Monoclinic. Point Group: 2=m: Prismatic, granular, also as ¯brous aggregates …
Katophorite has the ideal formula A Na B (NaCa) C (Mg 4 Al) T (Si 7 Al)O 22 W (OH) 2 (Hawthorne et al., 2012). No published analyses of amphiboles fall in the katophorite compositional field, except that of Harlow and Olds (1987) for an amphibole from near Hpakan in the Jade Mine Tract, Myanmar.
PE Katophorite = 8.02 barns/electron U=PE Katophorite x r electron = 26.42 barns/cc. Radioactivity: GRapi = 17.70 (Gamma Ray American Petroleum Institute Units) Concentration of Katophorite per GRapi unit = 5.65 (%) Estimated Radioactivity from Katophorite - barely detectable : Katophorite Classification
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Ferro-ferri-katophorite is the 9th species carrying the katophorite root name, and is related to katophorite by the Fe2+ + Fe3+ → Mg2+ + Al3+ substitution. Type material was deposited at the Museo de Mineralogía "Stelzner", Universidad Nacional de Córdoba (Argentina), under catalog number MS003341.
The katophorite group minerals was redefined in the 2012 amphibole nomenclature and the Fe 2+ and Al dominant katophorite group mineral is now named ferro-katophorite. Co-Type Localities: ⓘ Gruesletten, Grorud, Oslo, …
Katophorite is named from the Greek word κατώφορος (kataphora) meaning carrying down, in allusion to its volcanic origin."Ferri-" and "Ferro-", etc. were added in 2012 as part of an IMA redefinition of the Katophorite Root Name Group due to its iron content.
Katophorite: Oberti R, Boiocchi M, Hawthorne F C, Ball N A, Harlow G E (2015) Katophorite from the Jade Mine Tract, Myanmar: mineral description of a rare (grandfathered) endmember of the amphibole supergroup Mineralogical Magazine 79 355-363: 2015: near Hpakan, Jade Mine Tract, Kachin State, Myanmar: 0: 293: 0006116: Ferri-fluoro-katophorite
Katophorite is typically black, dark greenish black or bluish black with vitreous luster and usually opaque but may also be transparent to translucent in thin slivers. Black Katophorite Is often …
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Name: Signifies an amphibole of the katophorite group with Fe3+ in the C site and fluorine greater than OH and/or Cl in the W site. Type Material: Department of Natural History, Royal Ontario Museum, Canada (M57071). References: (1) Oberti, R., M. Boiocchi, F.C. Hawthorne, N.A. Ball, and R.F. Martin (2019) Ferri-
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Katophorite occurs as parallel-fibre masses in nepheline syenite at the Miwula Hill close to upper Luangwa Valley, northern Province, Zambia. The occurrence was first described and katophorite analysed by A.R. Newton (1959). True colour of the amphibole is dark bluish green-grey. It is probable that at least some of this amphibole crystallized ...
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The Katophorite minerals are sodium-calcium Amphiboles with varying amounts of magnesium (Mg), iron (Fe) and alumiunum (Al). The varieties of Katophorite are named according for their chemical composition. Examples are: Ferri …
From the Greek for "carrying down," in allusion to its volcanic origin This mineral was defined as katophorite in the 1978 and 1997 amphibole nomenclatures. The katophorite group minerals was redefined in the 2012 amphibole nomenclature and the Fe 2+ and Al dominant katophorite group mineral is now named ferro-katophorite.
Mineral Data - Katophorite - Mineralienatlas Encyclopedia, Katophorit. Canadian Mineralogist 35 (1997), 219. Canadian Mineralogist 34 (1996), 577
The katophorite group minerals are sodium-calcium amphiboles defined with A (Na+K+2Ca)> 0.5 apfu and 0.5 apfu < C (Al+Fe 3+ +2Ti) < 1.5 apfu. Fluoro-katophorite is defined with A position: Na dominant C 2+ position: Mg dominant C 3+ position: Al dominant W position: F dominant
Ferro-ferri-katophorite (IMA2016–008), ideally Na(NaCa)(Fe2+ 4 Fe 3+)(Si 7Al)O 22(OH) 2, was found as xenocrysts up to 3 cm long and replacement rims around aegirine–augite in silicocarbonatite dykes cropping out in the Sierra de Maz, La Rioja province, NW Argentina. Ferro-ferri-katophorite is black and has vitreous lustre and a pale green ...
