General Hibschite Information
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Chemical Formula: |
Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) |
Composition: |
Molecular Weight = 426.39 gm |
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Calcium 28.20 % Ca 39.45 % CaO |
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Aluminum 12.66 % Al 23.91 % Al2O3 |
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Silicon 13.17 % Si 28.18 % SiO2 |
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Hydrogen 0.95 % H 8.45 % H2O |
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Oxygen 45.03 % O |
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______ ______ |
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100.00 % 100.00 % = TOTAL OXIDE |
Empirical Formula: |
Ca3Al2(SiO4)2(OH)4 |
Environment: |
Contact metamorphic and altered igneous rocks. |
IMA Status: |
Valid Species (Pre-IMA) 1905 |
Locality: |
Marienberg, near Aussig, Bohemia of Czechoslovakia. Link to MinDat.org Location Data. |
Synonym: |
Hydrogrossular |
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ICSD 31250 |
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PDF 45-1447 |
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Plazolite |
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Hibschite Image |
Images:
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Hibschite Crystallography
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Cell Dimensions: |
a = 12.01, Z = 8; V = 1,732.32 Den(Calc)= 3.27 |
Crystal System: |
Isometric - HexoctahedralH-M Symbol (4/m 3 2/m) Space Group: I a3d |
X Ray Diffraction: |
By Intensity(I/Io): 1.62(1), 2.71(1), 3.03(0.8), |
Crystal Structure:
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Lager G A , Armbruster T , Rotella F J , Rossman G R , American Mineralogist , 74 (1989) p.840-851, OH substitution in garnets: X-ray and neutron diffraction, infrared, and, geometric-modeling studies
View Additional jPOWD Structure files for Hibschite
[1]
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Physical Properties of Hibschite
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Cleavage: |
None |
Color: |
Colorless, White, Pale gray, Brown, Pink. |
Density: |
3.13 |
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. |
Hardness: |
6.5 - Pyrite |
Luminescence: |
Fluorescent. |
Luster: |
Vitreous (Glassy) |
Streak: |
white |
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Optical Properties of Hibschite
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Gladstone-Dale: |
CI meas= 0.018 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.06 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2064,KPDmeas= 0.2157,KC= 0.2197 |
Optical Data: |
Isotropic, n=1.675. |
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Calculated Properties of Hibschite
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Electron Density: |
relectron=3.14 gm/cc note: rHibschite =3.13 gm/cc. |
Fermion Index |
Fermion Index = 0.00675 Boson Index = 0.99325 |
Photoelectric: |
PEHibschite = 4.33 barns/electron U=PEHibschite x relectron= 13.61 barns/cc. |
Radioactivity: |
GRapi = 0 (Gamma Ray American Petroleum Institute Units) Hibschite is Not Radioactive |
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Hibschite Classification
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Dana Class: |
51.4.3d.1 (51)Nesosilicate Insular SiO4 Groups Only |
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(51.4)with cations in [6] and >[6] coordination |
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(51.4.3d)Garnet group (Hydrogarnet) |
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51.4.3d.1 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m |
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51.4.3d.2 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m |
Strunz Class: |
VIII/A.08-80 VIII - Silicates |
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VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6] |
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VIII/A.08 - Garnet group, Pyrope - Henritermierite |
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VIII/A.08-10 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-20 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-30 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-40 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-50 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-60 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-70 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-80 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m |
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VIII/A.08-90 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m |
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VIII/A.08-100 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m |
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VIII/A.08-110 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-120 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m |
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VIII/A.08-125 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m |
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VIII/A.08-130 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-138 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-140 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m |
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VIII/A.08-150 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m |
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VIII/A.08-160 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 41/acd 4/m 2/m 2/m |
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Other Hibschite Information
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References: |
NAME( Ford32) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32) |
See Also: |
Links to other databases for Hibschite :
1 - Alkali-Nuts(English)
2 - Alkali-Nuts(Francais)
3 -Am. Min. Crystal Structure Database
4 -Athena
5 - Crocoite.com Mineral Locations
6 - EUROmin Project
7 -Google Images
8 -Google Scholar
9 -Handbook of Mineralogy (MinSocAm)
10 -Handbook of Mineralogy (UofA)
11 -MinDAT
12 -MinMax(Deutsch)
13 -MinMax(English)
14 -Mineralienatlas (Deutsch)
15 -QUT Mineral Atlas
16 - WWW-MINCRYST
17 -École des Mines de Paris
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Print or Cut-and-Paste your Hibschite Specimen Label here :
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Hibschite
Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5)
Dana No: 51.4.3d.1 Strunz No: VIII/A.08-80
Locality:
Notes:
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