Foggite Mineral Data

General Foggite Information

Chemical Formula: CaAl(PO4)(OH)2•(H2O) Composition: Molecular Weight = 214.06 gm    Calcium     18.72 %  Ca   26.20 % CaO    Aluminum    12.60 %  Al   23.82 % Al₂O₃    Phosphorus  14.47 %  P    33.16 % P₂O₅    Hydrogen     1.88 %  H    16.83 % H₂O    Oxygen      52.32 %  O               ______        ______                100.00 %      100.00 % = TOTAL OXIDE Empirical Formula: CaAl(PO₄)(OH)₂•(H₂O) Environment: Secondary mineral, probably formed at < 300 deg. C in complex granite pegmatites. IMA Status: Approved IMA 1975 Locality: Palermo #1 mine, near North Groton, Grafton County, New Hamshire, USA. Link to MinDat.org Location Data. Name Origin: Named for Forrest. F. Fogg (1920-), mineral collector, New Hampshire, USA. Name Pronunciation: Foggite Synonym: ICSD 4261   PDF 29-282  

Foggite Image

Images:

Foggite Comments: Bright yellow, rounded crystalline aggregates of foggite on matrix. Location: Palermo #1 mine, North Groton, Crafton County, New Hampshire, USA. Scale: Not Given. © Lou Perloff / Photo Atlas of Minerals

Foggite Crystallography

Axial Ratios: a:b:c =0.4347:1:0.2433 Cell Dimensions: a = 9.27, b = 21.324, c = 5.19, Z = 8; V = 1,025.93 Den(Calc)= 2.77 Crystal System: Orthorhombic - DisphenoidalH-M Symbol (2 2 2) Space Group: A2122 X Ray Diffraction: By Intensity(I/I_o): 4.24(1), 2.693(0.8), 3.109(0.7), Crystal Structure:

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Moore P B , Kampf A R , Araki T , American Mineralogist , 60 (1975) p.965-971, Foggite, Ca(H2O)2[CaAl2(OH)4(PO4)2]: Its atomic arrangement and, relationship to calcium Tschermak s pyroxene

 

Physical Properties of Foggite

Cleavage: {010} Perfect, {100} Good Color: Colorless, White. Density: 2.78 Diaphaneity: Transparent Hardness: 4 - Fluorite Streak: white  

Optical Properties of Foggite

Gladstone-Dale: CI meas= 0.012 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= 0.008 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2203,KPDmeas= 0.2195,KC= 0.2222
Ncalc = 1.62 Optical Data: Biaxial (+), a=1.61, b=1.61, g=1.611, bire=0.0010, 2V(Calc)=0, 2V(Meas)=40-45.  

Calculated Properties of Foggite

Electron Density: Bulk Density (Electron Density)=2.80 gm/cc
note: Specific Gravity of Foggite =2.77 gm/cc.
Fermion Index: Fermion Index = 0.0005067159
Boson Index = 0.9994932841 Photoelectric: PE_Foggite = 3.37 barns/electron
U=PE_Foggite x rElectron Density= 9.42 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Foggite is Not Radioactive  

Foggite Classification

Dana Class: 42.07.02.01 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen   (42.07)where (AB)5 (XO4)3 Zq · x(H2O)   (42.07.02)Foggite Group  

42.07.02.01 Foggite CaAl(PO4)(OH)2•(H2O) A2122 2 2 2

 

42.07.02.02 Krasnovite! Ba(Al,Mg)(PO4,CO3)(OH)2•(H2O) Pnna,Pnnn 2/m 2/m 2/m

Strunz Class: 08.DL.05 08 - PHOSPHATES, ARSENATES, VANADATES   08.D - Phosphates, etc   08.DL -With large and medium-sized cations, (OH, etc.):RO4 = 2:1  

08.DL.05 Foggite CaAl(PO4)(OH)2•(H2O) A2122 2 2 2

 

Other Foggite Information

References: NAME( AntBidBlaNic4) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990) See Also: Links to other databases for Foggite :
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
[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

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