[Content and History] [Recent Issues] [Back Issues] [Subscriptions] [Contacts] See Also: [Diamond Crystals] [Excalibur Minerals] [Hudson Institute] [Minerals on CDROM] Mineral News was founded some twenty years ago and has developed a following of avid mineral collectors seeking timely information about new finds and other items of interest to the collector community. Articles are solicited from collector and scientific authors. General Ferrikatophorite InformationNa2Ca(Fe++,Mg)4Fe+++(Si7Al)O22(OH)2 |
Molecular Weight = 943.33 gm |
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Sodium 4.87 % Na 6.57 % Na2O |
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Calcium 4.25 % Ca 5.94 % CaO |
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Magnesium 2.58 % Mg 4.27 % MgO |
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Aluminum 2.86 % Al 5.40 % Al2O3 |
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Iron 23.68 % Fe 22.85 % FeO / 8.46 % Fe2O3 |
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Silicon 20.84 % Si 44.59 % SiO2 |
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Hydrogen 0.21 % H 1.91 % H2O |
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Oxygen 40.71 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Na2CaFe2+3MgFe3+Si7AlO22(OH)2 |
Phonolites and trachytes of the Rungwe Volcanics. Found in basic alkaline igneous rocks. |
Approved IMA 1997 |
Mariupol, Ukraine and Lake Nyasa, Tanzania. Link to MinDat.org Location Data. |
Named for its composition and from the Greek for "carrying down", in allusion to its volcanic origin. |
Cataphorite |
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| | Ferrikatophorite Crystallography Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
| Physical Properties of Ferrikatophorite{110} Perfect, {010} Parting |
3.2 - 3.5, Average = 3.35 |
Translucent |
5 - Apatite |
| Optical Properties of FerrikatophoriteCI meas= 0.064 (Fair) - where the CI = (1-KPDmeas/KC) |
KPDmeas= 0.2,KC= 0.2135 Ncalc = 1.68 - 1.75 Biaxial (-), a=1.64-1.681, b=1.658-1.688, g=1.66-1.692, bire=0.0110-0.0200, 2V(Calc)=36-72, 2V(Meas)=0-50. Dispersion r < v strong. |
pale yellow. |
bluish green. |
nearly black. |
| Calculated Properties of FerrikatophoriteBulk Density (Electron Density)=3.29 gm/cc |
note: Specific Gravity of Ferrikatophorite =3.35 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEFerrikatophorite = 8.57 barns/electron |
U=PEFerrikatophorite x rElectron Density= 28.19 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Ferrikatophorite is Not Radioactive | Ferrikatophorite Classification66.01.03b.14 (66)Inosilicate Double-Width Unbranched Chains, W=2 |
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(66.01)with P=2 amphibole configuration |
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(66.01.03b)Group 3, the sodic-calcic amphiboles |
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09.DE.20 09 - SILICATES (Germanates) |
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09.D - Inosilicates* Structural terminology according to Liebau (1985) |
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09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family |
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| Other Ferrikatophorite InformationNAME( Dana8) OPTIC PROP.(Dana8) |
Links to other databases for Ferrikatophorite : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - Google Images 6 - Google Scholar 7 - MinDAT 8 - MinMax(Deutsch) 9 - MinMax(English) 10 - Mineralienatlas (Deutsch) 11 - QUT Mineral Atlas 12 - Ruff.Info Search for Ferrikatophorite using: Visit our Advertisers for Ferrikatophorite : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Diamond Dan Publications Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Ferrikatophorite Mineral Data : Ask about Ferrikatophorite here : Print or Cut-and-Paste your Ferrikatophorite Specimen Label here :
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