Hendricksite Mineral Data

[Minerals for Sale] [New Minerals] [Diamond Crystals] [Gem Minerals] [My Best Minerals]
Classic minerals, out-of-print books & magazines, plus informative articles for collectors

General Hendricksite Information

Chemical Formula:

K(Zn,Mg,Mn)3Si3AlO10(OH)2

Composition:

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

Empirical Formula:

K_0.9Zn_1.4Mn²⁺_0.9Mg_0.5Si_2.7Al_1.3O₁₀(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.

Name Pronunciation:

Hendricksite + Pronunciation

Hendricksite Image

Images:

Click Here for Larger Hendricksite Image

Hendricksite Celsian

Comments: Gray massive celsian with dark red hendricksite.
Location: Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Images:

Hendricksite

Comments: Reddish black hendricksite crystal in cream-colored willemite.
Location: 'Mill Site', Franklin, Sussex County, New Jersey, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Hendricksite Crystallography

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

$Help on X Ray Diffraction:$ X Ray Diffraction:

By Intensity(I/I_o): 10.2(1), 3.398(0.6), 5.094(0.36),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

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

Physical Properties of Hendricksite

Cleavage:

{001} Perfect

Color:

Copper brown, Red, Reddish black.

Density:

2.86 - 3.43, Average = 3.14

Diaphaneity:

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

Optical Properties of Hendricksite

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
Ncalc = 1.56 - 1.67

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.

Calculated Properties of Hendricksite

Electron Density:

Bulk Density (Electron Density)=3.12 gm/cc
note: Specific Gravity of Hendricksite =3.20 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Hendricksite= 13.25 barns/electron
U=PE_Hendricksite x r_electron= 41.31 barns/cc.

Radioactivity:

GRapi = 100.31 (Gamma Ray American Petroleum Institute Units)
Concentration of Hendricksite per GRapi unit = 1.00 (%)

Estimated Radioactivity from Hendricksite - barely detectable

Hendricksite Classification

Dana Class:

71.02.02b.06 (71)Phyllosilicate Sheets of Six-Membered Rings

(71.02)with 2:1 Layers

(71.02.02b)Mica Group (Biotite subgroup)

71.02.02b.01 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m

71.02.02b.01a Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m

71.02.02b.01b Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m

71.02.02b.01c Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m

71.02.02b.02 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m

71.02.02b.03 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m

71.02.02b.03a Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m

71.02.02b.04 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m

71.02.02b.05 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m

71.02.02b.05a Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m

71.02.02b.06 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m

71.02.02b.07 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono

71.02.02b.08 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m

71.02.02b.08a Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m

71.02.02b.08b Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono

71.02.02b.09 Tainiolite KLiMg2Si4O10F2 C 2/m 2/m

71.02.02b.10 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m

71.02.02b.11 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m

71.02.02b.12 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m

71.02.02b.13 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m

71.02.02b.14 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

71.02.02b.15 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m

71.02.02b.16 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m

71.02.02b.18 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m

Strunz Class:

09.EC.20 09 - SILICATES (Germanates)

09.E - Phyllosilicates

09.EC -Phyllosilicates with mica sheets, composed of tetrahedral and octahedral nets

09.EC.20 Annite KFe3AlSi3O10(OH,F)2 C 2/m 2/m

09.EC.20 Biotite* K(Mg,Fe)3[AlSi3O10(OH,F)2 C 2/m 2/m

09.EC.20 Hendricksite K(Zn,Mg,Mn)3Si3AlO10(OH)2 C 2/m 2/m

09.EC.20 Ephesite NaLiAl2(Al2Si2)O10(OH)2 C 2/c 2/m

09.EC.20 Aspidolite NaMg3AlSi3O10(OH)2 C 2/m 2/m

09.EC.20 Lepidolite K(Li,Al)3(Si,Al)4O10(F,OH)2 C 2/m,Cm Mono

09.EC.20 Preiswerkite NaMg2Al3Si2O10(OH)2 C 2/m 2/m

09.EC.20 Masutomilite K(Li,Al,Mn)3[(Si,Al)4O10](F,OH)2 C 2/m 2/m

09.EC.20 Wonesite (Na,K).5(Mg,Fe,Al)3(Si,Al)4O10(OH,F)2 C 2/m 2/m

09.EC.20 Polylithionite KLi2AlSi4O10(F,OH)2 C 2/m 2/m

09.EC.20 Phlogopite KMg3(Si3Al)O10(F,OH)2 C 2/m 2/m

09.EC.20 Norrishite K(Mn2Li)Si4O10(O)2 C 2/m 2/m

09.EC.20 Siderophyllite KFe2Al(Al2Si2)O10(F,OH)2 C 2/m 2/m

09.EC.20 Fluorannite! KFe3AlSi3O10F2 C 2/m 2/m

09.EC.20 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m

09.EC.20 Zinnwaldite KLiFeAl(AlSi3)O10(F,OH)2 C 2/m 2/m

09.EC.20 Eastonite! KMg2Al[Al2Si2O10](OH)2 2/m

09.EC.20 Tetraferriannite K(Fe,Mg)3(Fe,Al)Si3O10(OH)2 C 2/m 2/m

09.EC.20 Tetraferriphlogopite! KMg3FeSi3O10(OH)2 2/m

09.EC.20 Trilithionite! KLi1.5Al1.5AlSi3O10F2 C 2/m 2/m

09.EC.20 Sokolovaite! CsLi2AlSi4O10F2 C 2/m, C 2 or Cm Mono

09.EC.20 Shirozulite! KMn3(AlSi3)O10(OH,F)2 C 2/m 2/m

09.EC.20 Suhailite! (NH4)Fe3(Si3Al)O10(OH)2 C 2/m? 2/m

09.EC.20 Fluorophlogopite! KMg3(AlSi3)O10F2 C 2/m 2/m

Other Hendricksite Information

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 - 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:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Hendricksite :

Dakota Matrix Minerals Google Search for Hendricksite
John Betts Fine Minerals Search for Hendricksite
Rock and Mineral Shows Google Search for Hendricksite
Weinrich Minerals, Inc. Google Search for Hendricksite

Ask about Hendricksite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

Print or Cut-and-Paste your Hendricksite Specimen Label here :

Hendricksite

K(Zn,Mg,Mn)3Si3AlO10(OH)2
Dana No: 71.02.02b.06 Strunz No: 09.EC.20
Locality:

Notes: