Katayamalite Mineral Data + 
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- 61.1.4.1 Baratovite KCa7(Ti,Zr)2Li3Si12O36F2 C 2/c 2/m
- 61.1.4.2 Katayamalite (K,Na)Ca7Li3Ti2[Si6O18]2(OH,F)2 C1 1
General Katayamalite Information |
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 Chemical Formula: |
(K,Na)Ca7Li3Ti2[Si6O18]2(OH,F)2 | ||
| Composition: |
Molecular Weight = 1,389.99 gm | ||
| Potassium 2.81 % K 3.39 % K2O | |||
| Sodium 0.41 % Na 0.56 % Na2O | |||
| Lithium 1.50 % Li 3.22 % Li2O | |||
| Calcium 20.18 % Ca 28.24 % CaO | |||
| Titanium 6.89 % Ti 11.49 % TiO2 | |||
| Silicon 24.25 % Si 51.87 % SiO2 | |||
| Hydrogen 0.11 % H 0.97 % H2O | |||
| Oxygen 43.16 % O | |||
| Fluorine 0.68 % F 0.68 % F | |||
| - % F -0.29 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.14 % = TOTAL OXIDE | |||
| Empirical Formula: |
KNa0.25Ca7Li3Ti2Si12O36(OH)1.5F0.5 | ||
| Environment: |
Found in an aegirine syenite. Isostructural with baratovite and is the hydroxyl endmember of the series. | ||
| IMA Status: |
Approved IMA 1983 | ||
| Locality: |
Iwagi Islet, Ehime Prefecture, Japan. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Nobuo Katayama (1910-), prominent Japanese mineralogist. | ||
Search for Katayamalite Images | |||
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Images:
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Katayamalite Crystallography |
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| Axial Ratios: |
a:b:c =0.5744:1:1.1783 | ||
| Cell Dimensions: |
a = 9.721, b = 16.923, c = 19.942, Z = 4; alpha = 91.43°, beta = 104.15°, gamma = 89.94° V = 3,180.10 Den(Calc)= 2.90 | ||
| Crystal System: |
Triclinic - PedialH-M Symbol (1) Space Group: C1 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 3.23(1), 1.933(0.4), 2.42(0.3),2.9(0.3), 2.94(0.3), 3.06(0.3), 1.382(0.2), 1.841(0.2), | ||
Physical Properties of Katayamalite |
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| Cleavage: |
[001] Perfect | ||
| Color: |
White. | ||
| Density: |
2.91 | ||
| Habit: |
Tabular - Form dimensions are thin in one direction. | ||
| Habit: |
Twinning Common - Crystals are usually twinned. | ||
| Hardness: |
3.5-4 - Copper Penny-Fluorite | ||
| Luminescence: |
Fluorescent, Short UV=bright blue white. | ||
| Luster: |
Vitreous - Pearly | ||
| Streak: |
white | ||
Optical Properties of Katayamalite |
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| Gladstone-Dale: |
CI meas= 0.01 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.007 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.232,KPDmeas= 0.2312,KC= 0.2336 |
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| Optical Data: |
Biaxial (+), a=1.67, b=1.671, g=1.677, bire=0.0070, 2V(Calc)=46, 2V(Meas)=32. Dispersion r > v strong. | ||
Calculated Properties of Katayamalite |
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| Electron Density: |
relectron=2.87 gm/cc |
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| Fermion Index |
Fermion Index = 0.02183 Boson Index = 0.97817 |
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| Photoelectric: |
PEKatayamalite = 4.84 barns/electron |
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| Radioactivity: |
GRapi = 40.21 (Gamma Ray American Petroleum Institute Units) Estimated Radioactivity from Katayamalite |
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Katayamalite Classification |
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| Dana Class: |
61.1.4.2 (61)Cyclosilicate Six-Membered Rings | ||
| (61.1)with [Si6O18] rings; possible (OH) and Al substitution | |||
| (61.1.4)Baratovite group | |||
| Strunz Class: |
VIII/EX.00-00 VIII - Silicates | ||
| VIII/EX - Unclassified Strunz Cyklosilicates | |||
| VIII/EX.00 - Cyclosilicate Six-Membered Rin | |||
Other Katayamalite Information |
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| References: |
NAME( Dana8) PHYS. PROP.(Dana8) OPTIC PROP.(Dana8) | ||
| See Also: |
Links to other databases for Katayamalite : 1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas 10 - WWW-MINCRYST Search for Katayamalite using: Visit our Advertisers for Katayamalite : Translate Katayamalite Mineral Data : Ask about Katayamalite here : Print or Cut-and-Paste your Katayamalite Specimen Label here :
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- barely detectable 
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