Chondrodite Mineral Data + 
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- 52.3.2b.1 Alleghanyite Mn5(SiO4)2(OH)2 P 21/a 2/m
- 52.3.2b.2 Chondrodite (Mg,Fe)5(SiO4)2(F,OH)2 P 21/c 2/m
- 52.3.2b.3 Reinhardbraunsite Ca5(SiO4)2(OH,F)2 P 21/a 2/m
- 52.3.2b.4 Ribbeite (Mn,Mg)5(SiO4)2(OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-10 Norbergite Mg3(SiO4)(F,OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-20 Chondrodite (Mg,Fe)5(SiO4)2(F,OH)2 P 21/c 2/m
- VIII/B.04-30 Humite (Mg,Fe)7(SiO4)3(F,OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-40 Clinohumite (Mg,Fe)9(SiO4)4(F,OH)2 P 21/c 2/m
- VIII/B.04-42 Hydroxylclinohumite! Mg9(SiO4)4(OH,F)2 P 21/c 2/m
- VIII/B.04-50 Ribbeite (Mn,Mg)5(SiO4)2(OH)2 P nma 2/m 2/m 2/m
- VIII/B.04-60 Alleghanyite Mn5(SiO4)2(OH)2 P 21/a 2/m
- VIII/B.04-70 Reinhardbraunsite Ca5(SiO4)2(OH,F)2 P 21/a 2/m
- VIII/B.04-80 Manganhumite (Mn,Mg)7(SiO4)3(OH)2 Pbnm 2/m 2/m 2/m
- VIII/B.04-90 Leucophoenicite Mn7(SiO4)3(OH)2 P 21/a 2/m
- VIII/B.04-100 Jerrygibbsite (Mn,Zn)9(SiO4)4(OH)2 Pbn21 mm2
- VIII/B.04-110 Sonolite Mn9(SiO4)4(OH,F)2 P 21/a 2/m
General Chondrodite Information |
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 Chemical Formula: |
(Mg,Fe++)5(SiO4)2(F,OH)2 | ||
| Composition: |
Molecular Weight = 382.12 gm | ||
| Magnesium 23.85 % Mg 39.55 % MgO | |||
| Iron 18.27 % Fe 23.50 % FeO | |||
| Silicon 14.70 % Si 31.45 % SiO2 | |||
| Hydrogen 0.13 % H 1.18 % H2O | |||
| Oxygen 35.59 % O | |||
| Fluorine 7.46 % F 7.46 % F | |||
| - % F -3.14 % -O=F2 | |||
| ______ ______ | |||
| 100.00 % 100.00 % = TOTAL OXIDE | |||
| Empirical Formula: |
Mg3.75Fe2+1.25(SiO4)2F1.5(OH)0.5 | ||
| Environment: |
Contact metamorphic rocks. | ||
| IMA Status: |
Valid Species (Pre-IMA) 1817 | ||
| Locality: |
Wunsiedel and Passau, Germany. Link to MinDat.org Location Data. | ||
| Name Origin: |
From the Greek chondros - "grain." | ||
| Synonym: |
ICSD 15180 | ||
| PDF 12-527 | |||
Chondrodite Image | |||
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Images:
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Images:
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Chondrodite Crystallography |
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| Axial Ratios: |
a:b:c =1.6638:1:2.1712 | ||
| Cell Dimensions: |
a = 7.87, b = 4.73, c = 10.27, Z = 2; beta = 109.033° V = 361.40 Den(Calc)= 3.51 | ||
| Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c | ||
| X Ray Diffraction: |
By Intensity(I/Io): 2.252(1), 2.272(1), 1.737(0.95), | ||
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Crystal Structure:
Mouse |
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Physical Properties of Chondrodite |
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| Cleavage: |
[100] Good | ||
| Color: |
Yellow, Orange, Brownish white, Reddish white, Greenish white. | ||
| Density: |
3.1 - 3.2, Average = 3.15 | ||
| Diaphaniety: |
Transparent to translucent | ||
| Fracture: |
Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz). | ||
| Habit: |
Crystalline - Fine - Occurs as well-formed fine sized crystals. | ||
| Habit: |
Massive - Granular - Common texture observed in granite and other igneous rock. | ||
| Hardness: |
6-6.5 - Orthoclase-Pyrite | ||
| Luminescence: |
Non-fluorescent. | ||
| Luster: |
Vitreous - Greasy | ||
| Streak: |
gray | ||
Optical Properties of Chondrodite |
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| Gladstone-Dale: |
CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC) CI calc= 0.084 (Poor) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1798,KPDmeas= 0.2003,KC= 0.1962 |
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| Optical Data: |
Biaxial (+), a=1.592-1.643, b=1.602-1.655, g=1.619-1.675, bire=0.0270-0.0320, 2V(Calc)=76-78, 2V(Meas)=64-90. Dispersion weak to moderate, r > v. | ||
| Pleochroism (x): |
yellowish brown, deep chrome yellow, reddish brown, or brownish yellow. | ||
| Pleochroism (y): |
pale yellowish brown, yellow, pale reddish brown, or yellowish green. | ||
| Pleochroism (z): |
colorless, light yellow, pale brown, or pale green. | ||
Calculated Properties of Chondrodite |
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| Electron Density: |
relectron=3.09 gm/cc |
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| Fermion Index |
Fermion Index = 0.03476 Boson Index = 0.96524 |
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| Photoelectric: |
PEChondrodite = 6.55 barns/electron |
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| Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Chondrodite is Not Radioactive |
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Chondrodite Classification |
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| Dana Class: |
52.3.2b.2 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O | ||
| (52.3)with cations in [6] coordination only | |||
| (52.3.2b)Humite group (Chondrodite series) | |||
| Strunz Class: |
VIII/B.04-20 VIII - Silicates | ||
| VIII/B - Nesosubsilicates, with anions unfamiliar to tetraheders, cations of octahedral and tetrahedral orientation [4/6] | |||
| VIII/B.04 - Humite group | |||
Other Chondrodite Information |
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| References: |
NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Heinrich65) | ||
| See Also: |
Links to other databases for Chondrodite : 1 - Am. Min. Crystal Structure Database 2 - Amethyst Galleries' Mineral Gallery 3 - Athena 4 - EUROmin Project 5 - Ecole des Mines de Paris 6 - Franklin Minerals(Dunn) 7 - Franklin Minerals(Palache) 8 - Google Images 9 - Google Scholar 10 - Handbook of Mineralogy (MinSocAm) 11 - Handbook of Mineralogy (UofA) 12 - HyperPhysics 13 - MinDAT 14 - MinMax(Deutsch) 15 - MinMax(English) 16 - Mineralienatlas (Deutsch) 17 - QUT Mineral Atlas 18 - Ruff.Info 19 - Scandinavian mineral gallery 20 - University of Colorado - Mineral Structure Data 21 - WWW-MINCRYST Search for Chondrodite using: Visit our Advertisers for Chondrodite : AA Mineral SpecimensB & L Fine Minerals Dan Weinrich Fine Minerals Dan Weinrich Auctions Excalibur Minerals Exceptional Minerals Fabre Minerals Greenside Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club MineralsWeb Fine Minerals The GeoZone Wrights Rock Shop Translate Chondrodite Mineral Data : Ask about Chondrodite here : Print or Cut-and-Paste your Chondrodite Specimen Label here :
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