[Fine Minerals] [What's New] [Mineral Galleries] [My Collection] [Mineral Auctions] Dan Weinrich Fine Minerals Full-time professional mineral dealer with over 31 years experience in mineral collecting And 15 years selling mineral specimens on the internet and at major mineral shows General Magnesiochloritoid InformationMgAl2SiO5(OH)2 |
Molecular Weight = 220.37 gm |
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Magnesium 11.03 % Mg 18.29 % MgO |
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Aluminum 24.49 % Al 46.27 % Al2O3 |
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Silicon 12.74 % Si 27.27 % SiO2 |
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Hydrogen 0.91 % H 8.18 % H2O |
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Oxygen 50.82 % O |
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100.00 % 100.00 % = TOTAL OXIDE |
MgAl2SiO5(OH)2 |
In metapelites and related rocks within high-grade blueschist rocks; stable under metamorphic conditions of near 500 ±C and 18 kbar. |
Approved IMA 1983 |
Monte Rosa massif, near the Ghiacciaio di Verra; in the Val d'Ayas, Italy, near the border with Switzerland. Link to MinDat.org Location Data. |
Named for magnesium in its composition and its relation to chloritoid. |
Sismondine |
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| | Magnesiochloritoid Crystallographya:b:c =1.7291:1:3.3233 |
a = 9.46, b = 5.471, c = 18.182, Z = 9; beta = 101.4° V = 922.46 Den(Calc)= 3.57 |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/c |
By Intensity(I/Io): 4.47(1), 2.46(0.9), 2.97(0.8), |
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| Physical Properties of Magnesiochloritoid{001} Perfect, {110} Distinct |
Greenish gray, Greenish black. |
3.5 - 3.6, Average = 3.55 |
Translucent |
6.5 - Pyrite |
Pearly |
gray white |
| Optical Properties of MagnesiochloritoidCI meas= 0.065 (Fair) - where the CI = (1-KPDmeas/KC) |
CI calc= 0.07 (Fair) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2017,KPDmeas= 0.2028,KC= 0.2169 Ncalc = 1.76 - 1.78 Biaxial (?), b=1.72 |
| Calculated Properties of MagnesiochloritoidBulk Density (Electron Density)=3.54 gm/cc |
note: Specific Gravity of Magnesiochloritoid =3.55 gm/cc. Fermion Index = 0.01 |
Boson Index = 0.99 PEMagnesiochloritoid = 1.47 barns/electron |
U=PEMagnesiochloritoid x rElectron Density= 5.20 barns/cc. GRapi = 0 (Gamma Ray American Petroleum Institute Units) |
Magnesiochloritoid is Not Radioactive | Magnesiochloritoid Classification52.03.03.02 (52)Nesosilicate Insular SiO4 Groups and O, OH, F, and H2O |
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(52.03)with cations in [6] coordination only |
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(52.03.03)Chloritoid group |
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09.AF.85 09 - SILICATES (Germanates) |
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09.A - Nesosilicates |
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09.AF -Nesosilicates with additional anions; |
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| Other Magnesiochloritoid InformationNAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) |
Links to other databases for Magnesiochloritoid : |
1 - Am. Min. Crystal Structure Database 2 - Athena 3 - Google Images 4 - Google Scholar 5 - Handbook of Mineralogy (MinSocAm) 6 - Handbook of Mineralogy (UofA) 7 - MinDAT 8 - MinMax(Deutsch) 9 - MinMax(English) 10 - Mineralienatlas (Deutsch) 11 - QUT Mineral Atlas 12 - Ruff.Info 13 - WWW-MINCRYST Search for Magnesiochloritoid using: Visit our Advertisers for Magnesiochloritoid : AA Mineral SpecimensB & L Fine Minerals Crystalarium.com Dan Weinrich Fine Minerals Dan Weinrich Auctions Dakota Matrix Desert Winds Gems and Minerals Excalibur Minerals Exceptional Minerals Fabre Minerals Heliodor John Betts Fine Minerals Mason's Minerals Mineral News Mineral of the Month Club Wrights Rock Shop Translate Magnesiochloritoid Mineral Data : Ask about Magnesiochloritoid here : Print or Cut-and-Paste your Magnesiochloritoid Specimen Label here :
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