Katophorite Mineral Data

General Katophorite Information

Chemical Formula: Na(CaNa)Fe++4(Al,Fe+++)Si7AlO22(OH)2 Composition: Molecular Weight = 939.86 gm    Potassium   1.25 %  K     1.50 % K₂O    Sodium      2.94 %  Na    3.96 % Na₂O    Calcium     5.54 %  Ca    7.76 % CaO    Magnesium   3.88 %  Mg    6.43 % MgO    Titanium    1.02 %  Ti    1.70 % TiO₂    Manganese   1.17 %  Mn    1.51 % MnO    Aluminum    2.01 %  Al    3.80 % Al₂O₃    Iron       19.31 %  Fe   24.84 % FeO    Silicon    21.81 %  Si   46.67 % SiO₂    Hydrogen    0.21 %  H     1.92 % H₂O    Oxygen     40.86 %  O              ______        ______               100.00 %      100.09 % = TOTAL OXIDE Empirical Formula: Na_1.2K_0.3Ca_1.3Fe²⁺_3.25Mg_1.5Ti_0.2Mn²⁺_0.2Al_0.7Si_7.3O₂₂(OH)₂ Environment: Found in basic alkaline igneous rocks and in blueschist facies jadeitites. Forms a series with magnesiokatophorite. IMA Status: Valid Species (Pre-IMA) 1894 Locality: La Tabatiere, PQ, Canada and the Christiania region, Norway. Link to MinDat.org Location Data. Name Origin: Named from the Greek for "carrying down", in allusion to its volcanic origin. Name Pronunciation: Katophorite + Pronunciation Synonym: Aluminokatophorite   Catophorite   ICSD 64886   PDF 85-1481  

Katophorite Image

Images:

Katophorite   Yoshimuraite Comments: Dark green katophorite associated with yoshimuraite. Inset fragment shows the transparency of the katophorite. Location: Toguchi mine, Shidara, Kitashidara-Gun, Aichi, Japan. Scale: See Image. © Rruff Database

Katophorite Crystallography

Axial Ratios: a:b:c =0.5555:1:0.293 Cell Dimensions: a = 10.019, b = 18.036, c = 5.286, Z = 2; beta = 104.98° V = 922.73 Den(Calc)= 3.38 Crystal System: Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m Crystal Structure:

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Hawthorne F C , Oberti R , Sardone N , The Canadian Mineralogist , 34 (1996) p.577-593, Sodium at the A site in clinoamphiboles: the effects of composition, on patterns of order, Sample: A7 - D163 N.2 View Additional jPOWD Structure files for Katophorite [1]

 

Physical Properties of Katophorite

Cleavage: {110} Perfect, {010} Parting Color: Black, Dark greenish black, Bluish black, Reddish yellow, Bluish green. Density: 3.2 - 3.5, Average = 3.35 Diaphaneity: Transparent to Translucent Fracture: Brittle - Generally displayed by glasses and most non-metallic minerals. Habit: Epitaxial - Crystallographic alignment with a precursor mineral Habit: Granular - Generally occurs as anhedral to subhedral crystals in matrix. Habit: Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). Hardness: 5 - Apatite Luster: Vitreous (Glassy)  

Optical Properties of Katophorite

Gladstone-Dale: CI meas= 0.036 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.045 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1982,KPDmeas= 0.2,KC= 0.2074
Ncalc = 1.66 - 1.73 Optical Data: 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.  

Calculated Properties of Katophorite

Electron Density: Bulk Density (Electron Density)=3.29 gm/cc
note: Specific Gravity of Katophorite =3.35 gm/cc.
Fermion Index: Fermion Index = 0.01
Boson Index = 0.99 Photoelectric: 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

Dana Class: 66.01.03b.12 (66)Inosilicate Double-Width Unbranched Chains, W=2   (66.01)with P=2 amphibole configuration   (66.01.03b)Group 3, the sodic-calcic amphiboles  

66.01.03b.01 Winchite [](CaNa)Mg4(Al,Fe3)Si8O22(OH)2 C 2/m 2/m

 

66.01.03b.01a Parvowinchite Na(NaMn)(Mg4Fe)Si8O22(OH)2 C 2/m 2/m

 

66.01.03b.02 Ferrowinchite [](CaNa)Fe4(Al,Fe)Si8O22(OH)2 C 2/m 2/m

 

66.01.03b.03 Ferriwinchite ([],Na)(Na,Ca)2(Mg,Fe)4Fe[Si8O22](OH)2 C 2/m 2/m

 

66.01.03b.04 Ferroferriwinchite* CaNa(Fe,Mg)4Fe[Si8O22](OH)2 C 2/m 2/m

 

66.01.03b.05 Barroisite [](CaNa)Mg3AlFeSi7AlO22(OH)2 C 2/m 2/m

 

66.01.03b.05a Aluminobarroisite! []CaNaMg3Al2(Si7Al)O22(OH)2 C 2/m 2/m

 

66.01.03b.06 Ferrobarroisite [](CaNa)Fe3AlFeSi7AlO22(OH)2 C 2/m 2/m

 

66.01.03b.06a Aluminoferrobarroisite! []CaNa(Fe2)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

 

66.01.03b.07 Ferribarroisite CaNa(Fe,Mg)3Fe2[AlSi7O22](OH)2 C 2/m 2/m

 

66.01.03b.08 Ferroferribarroisite* CaNa(Fe,Mg)3Fe2[AlSi7O22](OH)2 C 2/m 2/m

 

66.01.03b.08a Ferri-ferrobarroisite! []CaNa(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m

 

66.01.03b.09 Richterite Na(CaNa)(Mg,Fe)5[Si8O22](OH)2 C 2/m 2/m

 

66.01.03b.09a Fluororichterite! Na(CaNa)Mg5[Si8O22]F2 C 2/m 2/m

 

66.01.03b.09b Potassic-fluororichterite! (K,Na)(CaNa)Mg5[Si8O22]F2 C 2/m 2/m

 

66.01.03b.09c Potassicrichterite! (K,Na)(CaNa)2Mg5[Si8O22](OH,F)2 C 2/m 2/m

 

66.01.03b.10 Ferrorichterite Na(CaNa)Fe5[Si8O22](OH)2 C 2/m 2/m

 

66.01.03b.11 Magnesiokatophorite Na(CaNa)Mg4AlSi7AlO22(OH)2 C 2/m 2/m

 

66.01.03b.12 Katophorite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m

 

66.01.03b.13 Magnesioferrikatophorite Na2Ca(Mg,Fe)4FeSi7AlO22(OH)2 C 2/m 2/m

 

66.01.03b.14 Ferrikatophorite Na2Ca(Fe,Mg)4Fe(Si7Al)O22(OH)2 C 2/m 2/m

 

66.01.03b.15 Magnesiotaramite Na(CaNa)Mg3ALFe[Si6Al2O22](OH)2 C 2/m 2/m

 

66.01.03b.15a Aluminotaramite! Na(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

 

66.01.03b.15b Alumino-magnesiotaramite! Na(CaNa)(Mg3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

 

66.01.03b.15c Fluoro-alumino-magnesiotaramite! Na(CaNa)(Mg3Al2)(Si6Al2)O22F2 C 2/m 2/m

 

66.01.03b.16 Taramite Na(CaNa)Fe3AlFe[Si6Al2O22](OH)2 C 2/m 2/m

 

66.01.03b.17 Ferri-magnesiotaramite! NaCaNaMg3Fe2[Si6Al2O22](OH)2 C 2/m 2/m

 

66.01.03b.18 Ferritaramite Na(CaNa)(Fe,Mg)3Fe2[Si6Al2O22](OH)2 C 2/m 2/m

 

66.01.03b.19 Fluoropargasite! NaCa2(Mg3FeAl)5(Si6Al2O22)F2 C 2/m 2/m

 

66.01.03b.20 Parvo-mangano-edenite! Na(CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m

 

66.01.03b.21 Parvo-manganotremolite! [](CaMn)2Mg5(Si7Al)O22(OH)2 C 2/m 2/m

Strunz Class: 09.DE.20 09 - SILICATES (Germanates)   09.D - Inosilicates* Structural terminology according to Liebau (1985)   09.DE -Inosilicates with 2-periodic double chains, Si4O11; amphibole family  

09.DE.20 Winchite [](CaNa)Mg4(Al,Fe3)Si8O22(OH)2 C 2/m 2/m

 

09.DE.20 Aluminobarroisite! []CaNaMg3Al2(Si7Al)O22(OH)2 C 2/m 2/m

 

09.DE.20 Ferriwinchite ([],Na)(Na,Ca)2(Mg,Fe)4Fe[Si8O22](OH)2 C 2/m 2/m

 

09.DE.20 Ferroferriwinchite* CaNa(Fe,Mg)4Fe[Si8O22](OH)2 C 2/m 2/m

 

09.DE.20 Aluminoferrobarroisite! []CaNa(Fe2)3Al2(Si7Al)O22(OH)2 C 2/m 2/m

 

09.DE.20 Ferri-ferrobarroisite! []CaNa(Fe)3(Fe)2(Si7Al)O22(OH)2 C 2/m 2/m

 

09.DE.20 Ferribarroisite CaNa(Fe,Mg)3Fe2[AlSi7O22](OH)2 C 2/m 2/m

 

09.DE.20 Barroisite [](CaNa)Mg3AlFeSi7AlO22(OH)2 C 2/m 2/m

 

09.DE.20 Fluororichterite! Na(CaNa)Mg5[Si8O22]F2 C 2/m 2/m

 

09.DE.20 Ferrobarroisite [](CaNa)Fe3AlFeSi7AlO22(OH)2 C 2/m 2/m

 

09.DE.20 Magnesiotaramite Na(CaNa)Mg3ALFe[Si6Al2O22](OH)2 C 2/m 2/m

 

09.DE.20 Ferrikatophorite Na2Ca(Fe,Mg)4Fe(Si7Al)O22(OH)2 C 2/m 2/m

 

09.DE.20 Ferrorichterite Na(CaNa)Fe5[Si8O22](OH)2 C 2/m 2/m

 

09.DE.20 Ferrowinchite [](CaNa)Fe4(Al,Fe)Si8O22(OH)2 C 2/m 2/m

 

09.DE.20 Ferroferribarroisite* CaNa(Fe,Mg)3Fe2[AlSi7O22](OH)2 C 2/m 2/m

 

09.DE.20 Ferritaramite Na(CaNa)(Fe,Mg)3Fe2[Si6Al2O22](OH)2 C 2/m 2/m

 

09.DE.20 Ferri-magnesiotaramite! NaCaNaMg3Fe2[Si6Al2O22](OH)2 C 2/m 2/m

 

09.DE.20 Magnesioferrikatophorite Na2Ca(Mg,Fe)4FeSi7AlO22(OH)2 C 2/m 2/m

 

09.DE.20 Katophorite Na(CaNa)Fe4(Al,Fe)Si7AlO22(OH)2 C 2/m 2/m

 

09.DE.20 Parvowinchite Na(NaMn)(Mg4Fe)Si8O22(OH)2 C 2/m 2/m

 

09.DE.20 Potassic-fluororichterite! (K,Na)(CaNa)Mg5[Si8O22]F2 C 2/m 2/m

 

09.DE.20 Richterite Na(CaNa)(Mg,Fe)5[Si8O22](OH)2 C 2/m 2/m

 

09.DE.20 Taramite Na(CaNa)Fe3AlFe[Si6Al2O22](OH)2 C 2/m 2/m

 

09.DE.20 Magnesiokatophorite Na(CaNa)Mg4AlSi7AlO22(OH)2 C 2/m 2/m

 

09.DE.20 Potassicrichterite! (K,Na)(CaNa)2Mg5[Si8O22](OH,F)2 C 2/m 2/m

 

09.DE.20 Fluoro-alumino-magnesiotaramite! Na(CaNa)(Mg3Al2)(Si6Al2)O22F2 C 2/m 2/m

 

09.DE.20 Aluminotaramite! Na(CaNa)(Fe3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

 

09.DE.20 Alumino-magnesiotaramite! Na(CaNa)(Mg3Al2)(Si6Al2)O22(OH)2 C 2/m 2/m

 

Other Katophorite Information

References: NAME( Dana8) PHYS. PROP.(AntBidBlaNic2) OPTIC PROP.(Dana8) See Also: Links to other databases for Katophorite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - Handbook of Mineralogy (MinSocAm)
7 - Handbook of Mineralogy (UofA)
8 - MinDAT
9 - Mineralienatlas (Deutsch)
10 - Online Mineral Museum
11 - QUT Mineral Atlas
12 - Ruff.Info
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