| Rondorfite Mineral Data |
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- 51.4.6.1 Rondorfite ! Ca8Mg(SiO4)4Cl2 F d3 2/m 3
- VIII/B.05-05 Rondorfite Ca8Mg(SiO4)4Cl2 F d3 2/m 3
- VIII/B.05-10 Jasmundite Ca11(SiO4)4O2S I 42m 4 2m
General Rondorfite Information |
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 Chemical Formula: |
Ca8Mg(SiO4)4Cl2 | ||
| Composition: |
Molecular Weight = 782.89 gm | ||
| Sodium 0.06 % Na 0.08 % Na2O | |||
| Calcium 41.41 % Ca 57.95 % CaO | |||
| Magnesium 2.76 % Mg 4.58 % MgO | |||
| Titanium 0.06 % Ti 0.10 % TiO2 | |||
| Aluminum 0.21 % Al 0.39 % Al2O3 | |||
| Iron 0.43 % Fe 0.55 % FeO | |||
| Silicon 14.49 % Si 31.01 % SiO2 | |||
| Hydrogen 0.04 % H 0.33 % H2O | |||
| Chlorine 6.84 % Cl 6.84 % Cl | |||
| - % Cl -1.54 % -O=Cl2 | |||
| Oxygen 33.70 % O | |||
| ______ ______ | |||
| 100.00 % 100.29 % = TOTAL OXIDE | |||
| Empirical Formula: |
Ca8.09Na0.02Mg0.89Al0.06Fe2+0.06Si4.04Ti0.01O16.2Cl1.51(OH)0.29 | ||
| Environment: |
In xenoliths in leucite tephrite lava. | ||
| IMA Status: |
Approved IMA 1997 (Dana # Added) | ||
| Locality: |
A quarry at the Bellerberg volcano lava field, near Ettringen, 2 km north of Mayen, Laacher See region, eastern Eifel area, Germany. Link to MinDat.org Location Data. | ||
| Name Origin: |
Named for Alice and Eugen Rondorf, two distinguished mineral collectors, who found the mineral with Bernd Ternes in 1979. | ||
| Synonym: |
IMA1997-013 | ||
Search for Rondorfite Images | |||
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Images:
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Rondorfite Crystallography |
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| Cell Dimensions: |
a = 15.085, Z = 8; V = 3,432.70 Den(Calc)= 3.03 | ||
| Crystal System: |
Isometric - DiploidalH-M Symbol (2/m 3) Space Group: F d3 | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.666(1)(440), 1.54(0.5)(844), 2.901(0.4)(511),1.4959(0.3)(951), 1.777(0.3)(822), 1.885(0.3)(800), 1.964(0.3)(553), | ||
Physical Properties of Rondorfite |
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| Color: |
Orange brown, Amber brown. | ||
| Diaphaniety: |
Transparent | ||
| Fracture: |
Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments. | ||
| Habit: |
Anhedral Grains - Granular minerals without the expression of crystal shapes | ||
| Luster: |
Vitreous (Glassy) | ||
| Streak: |
light amber | ||
Optical Properties of Rondorfite |
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| Gladstone-Dale: |
CI calc= -0.003 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2211,KC= 0.2205 |
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| Optical Data: |
Isotropic, n=1.67. | ||
Calculated Properties of Rondorfite |
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| Electron Density: |
relectron=3.02 gm/cc |
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| Fermion Index |
Fermion Index = 0.01042 Boson Index = 0.98958 |
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| Photoelectric: |
PERondorfite = 6.28 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Rondorfite is Not Radioactive |
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Rondorfite Classification |
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| Dana Class: |
51.4.6.1 (51)Nesosilicate Insular SiO4 Groups Only | ||
| (51.4)with cations in [6] and >[6] coordination | |||
| (51.4.6)Dana Group | |||
| Strunz Class: |
VIII/B.05-05 VIII - Silicates | ||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6] | |||
| VIII/B.05 - Jasmundite series | |||
Other Rondorfite Information |
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| References: |
NAME( CanMin, 42:1283) PHYS. PROP.(CanMin, 42:1283) OPTIC PROP.(CanMin, 42:1283) | ||
| See Also: |
Links to other databases for Rondorfite : 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 Search for Rondorfite using: Visit our Advertisers for Rondorfite : Translate Rondorfite Mineral Data : Ask about Rondorfite here : Print or Cut-and-Paste your Rondorfite Specimen Label here :
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