General Hendricksite Information
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Chemical Formula: |
K(Zn,Mg,Mn)3Si3AlO10(OH)2 |
Composition: |
Molecular Weight = 493.25 gm |
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Potassium 7.13 % K 8.59 % K2O |
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Magnesium 2.46 % Mg 4.09 % MgO |
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Manganese 10.02 % Mn 12.94 % MnO |
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Aluminum 7.11 % Al 13.44 % Al2O3 |
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Zinc 18.56 % Zn 23.10 % ZnO |
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Silicon 15.37 % Si 32.89 % SiO2 |
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Hydrogen 0.41 % H 3.65 % H2O |
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Oxygen 38.92 % O |
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______ ______ |
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100.00 % 98.70 % = TOTAL OXIDE |
Empirical Formula: |
K0.9Zn1.4Mn2+0.9Mg0.5Si2.7Al1.3O10(OH)2 |
Environment: |
Restricted to lens or sheet like skarn bodies in a metamorphosed zinc deposit. |
IMA Status: |
Approved IMA 1966 |
Locality: |
Franklin, Sussex County, New Jersey, USA. Link to MinDat.org Location Data. |
Name Origin: |
Named for Dr. Sterling B. Hendricks (1902-?), American crystallographer and chemist, a student of micas. |
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Hendricksite Image |
Images:
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Images:
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Hendricksite Crystallography
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Axial Ratios: |
a:b:c =0.5606:1:1.0746 |
Cell Dimensions: |
a = 5.34, b = 9.524, c = 10.235, Z = 2; beta = 100.07° V = 512.51 Den(Calc)= 3.20 |
Crystal System: |
Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m |
X Ray Diffraction: |
By Intensity(I/Io): 10.2(1), 3.398(0.6), 5.094(0.36), |
Crystal Structure:
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Robert J L , Gasperin M , Tschermaks Mineralogische und Petrographische Mitteilungen , 34 (1985) p.1-14, Crystal structure refinement of hendricksite, a Zn- and Mn-rich trioctahedral, potassium mica: a contribution to the crystal chemistry of zinc-bearing minerals, Locality: Franklin Furnace, New Jersey, USA, Note: polytype 1M
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Physical Properties of Hendricksite
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Cleavage: |
[001] Perfect |
Color: |
Copper brown, Red, Reddish black. |
Density: |
2.86 - 3.43, Average = 3.14 |
Diaphaniety: |
Translucent |
Habit: |
Aggregates - Made of numerous individual crystals or clusters. |
Habit: |
Euhedral Crystals - Occurs as well-formed crystals showing good external form. |
Habit: |
Foliated - Two dimensional platy forms. |
Hardness: |
2.5-3 - Finger Nail-Calcite |
Streak: |
red brown |
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Optical Properties of Hendricksite
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Gladstone-Dale: |
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 |
Optical Data: |
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. |
Pleochroism (x): |
pale yellow. |
Pleochroism (y): |
light chestnut brown. |
Pleochroism (z): |
light chestnut brown. |
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Calculated Properties of Hendricksite
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Electron Density: |
relectron=3.12 gm/cc note: rHendricksite =3.20 gm/cc. |
Fermion Index |
Fermion Index = 0.01744 Boson Index = 0.98256 |
Photoelectric: |
PEHendricksite = 13.25 barns/electron U=PEHendricksite x relectron= 41.31 barns/cc. |
Radioactivity: |
GRapi = 100.31 (Gamma Ray American Petroleum Institute Units)
Estimated Radioactivity from Hendricksite - barely detectable
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Hendricksite Classification
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Dana Class: |
71.2.2b.6 (71)Phyllosilicate Sheets of Six-Membered Rings |
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(71.2)with 2:1 Layers |
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(71.2.2b)Mica Group (Biotite subgroup) |
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71.2.2b.1 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m |
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71.2.2b.1a Tetra-ferriphlogopite! KMg3FeSi3O10(OH)2 2/m |
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71.2.2b.1b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m |
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71.2.2b.2 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m |
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71.2.2b.3 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m |
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71.2.2b.3a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m |
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71.2.2b.4 Tetra-ferri-annite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m |
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71.2.2b.5 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m |
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71.2.2b.5a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m |
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71.2.2b.6 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m |
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71.2.2b.7 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono |
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71.2.2b.8 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m |
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71.2.2b.8a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m |
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71.2.2b.8b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono |
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71.2.2b.9 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m |
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71.2.2b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m |
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71.2.2b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m |
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71.2.2b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m |
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71.2.2b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m |
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71.2.2b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m |
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71.2.2b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m |
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71.2.2b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m |
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71.2.2b.17 IMA2004-049! NaMg3(AlSi3)O10(OH)2 C 2/m 2/m |
Strunz Class: |
VIII/H.11-100 VIII - Silicates |
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VIII/H - Phyllosilicates (layered) Mica like layered silicates with [Si4O10]4- and related groups |
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VIII/H.11 - Mica group, Biotite series |
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VIII/H.11-00* Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m |
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VIII/H.11-10 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m |
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VIII/H.11-20 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m |
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VIII/H.11-30 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m |
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VIII/H.11-35 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m |
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VIII/H.11-40 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m |
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VIII/H.11-50 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m |
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VIII/H.11-60 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m |
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VIII/H.11-70 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m |
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VIII/H.11-80 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m |
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VIII/H.11-90 Tetra-ferriphlogopite! KMg3FeSi3O10(OH)2 2/m |
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VIII/H.11-100 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m |
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VIII/H.11-102 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m |
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VIII/H.11-105 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m |
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VIII/H.11-110 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m |
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VIII/H.11-120 Tetra-ferri-annite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m |
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VIII/H.11-130 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m |
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VIII/H.11-140 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m |
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VIII/H.11-150 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m |
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VIII/H.11-160 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m |
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Other Hendricksite Information
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References: |
NAME( AntBidBlaNic2) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(AntBidBlaNic2) |
See Also: |
Links to other databases for Hendricksite :
1 -Am. Min. Crystal Structure Database
2 -Athena
3 - Crocoite.com Mineral Locations
4 - EUROmin Project
5 -Google Images
6 -Google Scholar
7 -Handbook of Mineralogy (MinSocAm)
8 -Handbook of Mineralogy (UofA)
9 -MinDAT
10 -MinMax(Deutsch)
11 -MinMax(English)
12 -Mineralienatlas (Deutsch)
13 -QUT Mineral Atlas
14 - WWW-MINCRYST
15 -École des Mines de Paris
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Print or Cut-and-Paste your Hendricksite Specimen Label here :
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Hendricksite
K(Zn,Mg,Mn)3Si3AlO10(OH)2
Dana No: 71.2.2b.6 Strunz No: VIII/H.11-100
Locality:
Notes:
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