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Hendricksite Mineral Data |
General Hendricksite Information |
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K(Zn,Mg,Mn)3Si3AlO10(OH)2 | ||
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Molecular Weight = 493.25 gm | ||
Potassium 7.13 % K 8.59 % K2O | |||
Magnesium 2.46 % Mg 4.09 % MgO | |||
Manganese 10.02 % Mn 12.94 % MnO | |||
Aluminum 7.11 % Al 13.44 % Al2O3 | |||
Zinc 18.56 % Zn 23.10 % ZnO | |||
Silicon 15.37 % Si 32.89 % SiO2 | |||
Hydrogen 0.41 % H 3.65 % H2O | |||
Oxygen 38.92 % O | |||
______ ______ | |||
100.00 % 98.70 % = TOTAL OXIDE | |||
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K0.9Zn1.4Mn2+0.9Mg0.5Si2.7Al1.3O10(OH)2 | ||
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Restricted to lens or sheet like skarn bodies in a metamorphosed zinc deposit. | ||
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Approved IMA 1966 | ||
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Franklin, Sussex County, New Jersey, USA. Link to MinDat.org Location Data. | ||
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Named for Dr. Sterling B. Hendricks (1902-?), American crystallographer and chemist, a student of micas. | ||
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Hendricksite + Pronunciation ![]() |
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Hendricksite Image | |||
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Hendricksite Crystallography |
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a:b:c =0.5606:1:1.0746 | ||
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a = 5.34, b = 9.524, c = 10.235, Z = 2; beta = 100.07° V = 512.51 Den(Calc)= 3.20 | ||
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Monoclinic - Prismatic H-M Symbol (2/m) Space Group: C 2/m | ||
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By Intensity(I/Io): 10.2(1), 3.398(0.6), 5.094(0.36), | ||
Physical Properties of Hendricksite |
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{001} Perfect | ||
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Copper brown, Red, Reddish black. | ||
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2.86 - 3.43, Average = 3.14 | ||
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Translucent | ||
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Aggregates - Made of numerous individual crystals or clusters. | ||
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Euhedral Crystals - Occurs as well-formed crystals showing good external form. | ||
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Foliated - Two dimensional platy forms. | ||
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2.5-3 - Finger Nail-Calcite | ||
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red brown | ||
Optical Properties of Hendricksite |
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CI meas= -0.063 (Fair) - where the CI = (1-KPDmeas/KC) CI calc= -0.044 (Good) - where the CI = (1-KPDcalc/KC) KPDcalc= 0.2043,KPDmeas= 0.2079,KC= 0.1957 Ncalc = 1.56 - 1.67 |
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Biaxial (-), a=1.598-1.624, b=1.658-1.686, g=1.66-1.697, bire=0.0620-0.0730, 2V(Calc)=20-44, 2V(Meas)=2-5. Dispersion r < v slight. | ||
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pale yellow. | ||
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light chestnut brown. | ||
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light chestnut brown. | ||
Calculated Properties of Hendricksite |
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Bulk Density (Electron Density)=3.12 gm/cc note: Specific Gravity of Hendricksite =3.20 gm/cc. |
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Fermion Index = 0.01 Boson Index = 0.99 |
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PEHendricksite = 13.25 barns/electron U=PEHendricksite x relectron= 41.31 barns/cc. |
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GRapi = 100.31 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Hendricksite |
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Hendricksite Classification |
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71.02.02b.06 (71)Phyllosilicate Sheets of Six-Membered Rings | ||
(71.02)with 2:1 Layers | |||
(71.02.02b)Mica Group (Biotite subgroup) | |||
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09.EC.20 09 - SILICATES (Germanates) | ||
09.E - Phyllosilicates | |||
09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets | |||
Other Hendricksite Information |
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NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) | ||
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Links to other databases for Hendricksite : 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 15 - WWW-MINCRYST Search for Hendricksite using: Visit our Advertisers for Hendricksite : Ask about Hendricksite here : Print or Cut-and-Paste your Hendricksite Specimen Label here :
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