Harkerite Mineral Data

Harkerite Mineral Data
Search Webmineral :
   
Home Crystal jmol jPOWD Chem X Ray Dana Strunz Properties A to Z Images Share
      News Help About


General Harkerite Information

Help on Chemical Formula: Chemical Formula: Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10•2(H2O)
Help on Composition: Composition: Molecular Weight = 2,935.91 gm
   Calcium    32.76 %  Ca   45.84 % CaO
   Magnesium   6.62 %  Mg   10.98 % MgO
   Aluminum    1.84 %  Al    3.47 % Al2O3
   Silicon     7.65 %  Si   16.37 % SiO2
   Boron       2.21 %  B     7.11 % B2O3
   Hydrogen    0.14 %  H     1.23 % H2O
   Carbon      4.09 %  C    14.99 % CO2
   Oxygen     44.69 %  O
             ______        ______ 
             100.00 %      100.00 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10•2(H2O)
Help on Environment: Environment: Skarns in dolomitic limestones at the contact with granite
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1948
Help on Locality: Locality: Camas Malag, near Broadford, Isle of Skye, Scotland. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Alfred Harker (1859-1939), British petrologist, Cambridge University, Cambridge, England.
Help on Name Pronunciation: Name Pronunciation: Harkerite + Pronunciation Say HARKERITE
Help on Synonym: Synonym: ICSD 12105
  PDF 10-465
 

Harkerite Image

Click Here for Larger Harkerite Image in a New Browser Window Images:
Click Here for Larger Harkerite Image

Harkerite

Comments: B&W PPL image of harkerite (Hrk) and clintonite (Cln) aggregate with inclusions of spinel (Spl) in Crestmore marble #2A Mgt: magnetite, Anh: anhydrite, Cal: calcite.
Location: Low-pressure contact aureole in the Crestmore quarry, Riverside County, California, USA. (CanMin, v37:277). Scale: See Image.
© Canadian Mineralogist

Harkerite Crystallography
Help on Axial Ratios: Axial Ratios: a:c = 1:1.84545
Help on Cell Dimensions: Cell Dimensions: a = 18.131, c = 33.46, Z = 6; V = 9,525.77 Den(Calc)= 3.07
Help on Crystal System: Crystal System: Trigonal - Hexagonal ScalenohedralH-M Symbol (3 2/m) Space Group: R 3m
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 2.61(1), 1.84(0.9), 2.13(0.8),
Click Here for Large Harkerite Structure Window 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


Giuseppetti G , Mazzi F , Tadini C , American Mineralogist , 62 (1977) p.263-272, The crystal structure of harkerite

 

Physical Properties of Harkerite

Help on Cleavage: Cleavage: None
Help on Color: Color: Colorless.
Help on Density: Density: 2.959
Help on Diaphaneity: Diaphaneity: Transparent
Help on Luminescence: Luminescence: Fluorescent, Long UV=weak dark red.
Help on Luster: Luster: Vitreous (Glassy)
Help on Streak: Streak: white
 

Optical Properties of Harkerite

Help on Dichroism (e): Dichroism (e): colorless.
Help on Dichroism (w): Dichroism (w): colorless.
Help on Gladstone-Dale: Gladstone-Dale: CI meas= -0.045 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.007 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2121,KPDmeas= 0.22,KC= 0.2106
Ncalc = 1.62 - 1.65
Help on Optical Data: Optical Data: Uniaxial (?), a=1.649-1.653, b=1.649-1.653, bire=0.0000.
 

Calculated Properties of Harkerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.06 gm/cc
note: Specific Gravity of Harkerite =3.07 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.01
Boson Index = 0.99
Help on Photoelectric: Photoelectric: PEHarkerite = 4.59 barns/electron
U=PEHarkerite x rElectron Density= 14.06 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Harkerite is Not Radioactive
 

Harkerite Classification
Help on Dana Class: Dana Class: 17.01.09.01 (17)Compound Carbonates
  (17.01)with miscellaneous formulae
  (17.01.09)Dana Group
 
17.01.09.01 Harkerite Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10•2(H2O) R 3m 3 2/m
Help on Strunz Class: Strunz Class: 06.AB.70 06 - BORATES
  06.A - Monoborates
  06.AB -BO3, with additional anions; 1(D) + OH, etc.
 
06.AB.70 Harkerite Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10•2(H2O) R 3m 3 2/m
 

Other Harkerite Information
Help on References: References: NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)
Help on See Also: See Also: Links to other databases for Harkerite :
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 Harkerite using:

Google
 
Web webmineral.com
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Harkerite :

A Bijoux Google Search for Harkerite
Adam's Minerals Google Search for Harkerite
Cape Minerals Google Search for Harkerite
Dakota Matrix Minerals Google Search for Harkerite
Excalibur Mineral Corp. Google Search for Harkerite
Exceptional Minerals Google Search for Harkerite
John Betts Fine Minerals Search for Harkerite
McDougall Minerals Google Search for Harkerite
Mineral News Website Link
Rock and Mineral Shows Google Search for Harkerite
Weinrich Minerals, Inc. Google Search for Harkerite

Ask about Harkerite 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 Espaņol

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

Harkerite

Ca24Mg8Al2(SiO4)8(BO3)6(CO3)10•2(H2O)
Dana No: 17.01.09.01 Strunz No: 06.AB.70
Locality:

 

Notes: