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Tiragalloite Mineral Data |
General Tiragalloite Information |
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Mn++4As+++++Si3O12(OH) | ||
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Molecular Weight = 587.93 gm | ||
Manganese 37.38 % Mn 48.26 % MnO | |||
Silicon 14.33 % Si 30.66 % SiO2 | |||
Arsenic 12.74 % As 19.55 % As2O5 | |||
Hydrogen 0.17 % H 1.53 % H2O | |||
Oxygen 35.38 % O | |||
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100.00 % 100.00 % = TOTAL OXIDE | |||
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Mn2+4AsSi3O12(OH) | ||
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Veinlets cutting massive braunite and quartz. | ||
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Approved IMA 1980 | ||
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Molinello, Chiavari, Val Graveglia, Liguria, Italy. Link to MinDat.org Location Data. | ||
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Named for Paolo Tiragallo (1905-). | ||
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Tiragalloite + Pronunciation ![]() |
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ICSD 8188 | ||
PDF 33-889 | |||
Tiragalloite Image | |||
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Tiragalloite Crystallography |
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a:b:c =0.3343:1:0.382 | ||
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a = 6.66, b = 19.92, c = 7.61, Z = 4; beta = 95.7° V = 1,004.61 Den(Calc)= 3.89 | ||
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: P 21/n | ||
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By Intensity(I/Io): 3.006(1), 3.267(0.71), 3.042(0.66), | ||
Physical Properties of Tiragalloite |
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{100} Good, {hk0} Parting | ||
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Orange. | ||
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3.84 | ||
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Acicular - Occurs as needle-like crystals. | ||
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Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline). | ||
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Subadamantine | ||
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white | ||
Optical Properties of Tiragalloite |
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CI meas= -0.001 (Superior) - where the CI = (1-KPDmeas/KC) CI calc= 0.012 (Superior) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.1933,KPDmeas= 0.1958,KC= 0.1957 Ncalc = 1.75 - 1.76 |
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Biaxial (+), a=1.745, b=1.751, g=1.76, bire=0.0150, 2V(Calc)=80, 2V(Meas)=38-46. | ||
Calculated Properties of Tiragalloite |
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Bulk Density (Electron Density)=3.66 gm/cc note: Specific Gravity of Tiragalloite =3.84 gm/cc. |
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Fermion Index = 0.0068626588 Boson Index = 0.9931373412 |
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PETiragalloite = 18.92 barns/electron U=PETiragalloite x rElectron Density= 69.20 barns/cc. |
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GRapi = 0 (Gamma Ray American Petroleum Institute Units) Tiragalloite is Not Radioactive |
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Tiragalloite Classification |
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57.02.01.01 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups | ||
(57.02)with [Si4O13] groups | |||
(57.02.01)Dana Group | |||
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09.BJ.25 09 - SILICATES (Germanates) | ||
09.B - Sorosilicates | |||
09.BJ -Sorosilicates with Si3O10, Si4O11, etc | |||
Other Tiragalloite Information |
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NAME( Dana8) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) | ||
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Links to other databases for Tiragalloite : 1 - Am. Min. Crystal Structure Database 2 - Athena 3 - EUROmin Project 4 - Ecole des Mines de Paris 5 - GeoScienceWorld 6 - Google Images 7 - Google Scholar 8 - Handbook of Mineralogy (MinSocAm) 9 - Handbook of Mineralogy (UofA) 10 - MinDAT 11 - Mineralienatlas (Deutsch) 12 - Online Mineral Museum 13 - QUT Mineral Atlas 14 - Ruff.Info Search for Tiragalloite using: Visit our Advertisers for Tiragalloite : Ask about Tiragalloite here : Print or Cut-and-Paste your Tiragalloite Specimen Label here :
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