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Fraipontite Mineral Data

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General Fraipontite Information

Help on Chemical  Formula: Chemical Formula: (Zn,Al)3(Si,Al)2O5(OH)4
Help on Composition: Composition: Molecular Weight = 372.82 gm
   Aluminum   9.41 %  Al   17.78 % Al2O3
   Zinc      40.34 %  Zn   50.21 % ZnO
   Silicon   10.55 %  Si   22.56 % SiO2
   Hydrogen   1.08 %  H     9.66 % H2O
   Oxygen    38.62 %  O
            ______        ______ 
            100.00 %      100.21 % = TOTAL OXIDE
Help on Empirical Formula: Empirical Formula: Zn2.3Al0.7Si1.4Al0.6O5(OH)4
Help on Environment: Environment: Alteration product of smithsonite.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1927
Help on Locality: Locality: Vielle-Montagne, Belgium. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named for Julien Jean Joseph Fraipont (1857-1910), and Charles Fraipont, of Liege, Belgium, both geologists and paleontologists.
Help on Name Pronunciation: Name Pronunciation: Fraipontite + Pronunciation Say FRAIPONTITE
Help on Synonym: Synonym: Zinalsite

Fraipontite Image

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  Zaccagnaite   Fraipontite

Comments: Scanning electron microscope image of hexagonal, tapering, prismatic zaccagnaite crystals, covered by a thin crust of fraipontite. (AmMin 86:1294).
Location: Marble quarries of the Carrara basin (Apuan Alps, Italy). Scale: See Image.
© American Mineralogist

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  Fraipontite   Zinalsite   Smithsonite

Comments: Pearly white, sub-mm fraipontite (zinalsite) crystals associated with green smithsonite.
Location: Lavrion District Mines, Lavrion District, Attikí (Attica; Attika) Prefecture, Greece. Scale: Specimen Size 1.4 x 1.0 x 0.9 cm.
© Rob Lavinsky

Fraipontite Crystallography

Help on Axial Ratios: Axial Ratios: a:b:c =0.581:1:0.7866
Help on Cell Dimensions: Cell Dimensions: a = 5.372, b = 9.246, c = 7.273, Z = 2; beta = 103.55° V = 351.19 Den(Calc)= 3.53
Help on Crystal System: Crystal System: Monoclinic - Domatic H-M Symbol (m) Space Group: Cm
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 7.03(1), 3.52(0.7), 2.65(0.4),1.54(0.3), 2.385(0.3), 2.49(0.3), 4.6(0.2),

Physical Properties of Fraipontite

Help on Cleavage: Cleavage: {???} Perfect
Help on Color: Color: Bluish, Yellowish white, Light green.
Help on Density: Density: 3.54
Help on Diaphaneity: Diaphaneity: Subtransparent to opaque
Help on Fracture: Fracture: Unknown - Minerals too small to observe fractures.
Help on Habit: Habit: Encrustations - Forms crust-like aggregates on matrix.
Help on Habit: Habit: Fibrous - Crystals made up of fibers.
Help on Habit: Habit: Porcelainous - Fine-grained, translucent massive material like broken china
Help on Hardness: Hardness: 2.5 - Finger Nail
Help on Luster: Luster: Silky
Help on Streak: Streak: white

Optical Properties of Fraipontite

Help on Gladstone-Dale: Gladstone-Dale: CI meas= 0.102 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= 0.1 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1764,KPDmeas= 0.1759,KC= 0.1959
Ncalc = 1.69
Help on Optical Data: Optical Data: Biaxial (-), a=1.62, b=1.624, g=1.624, bire=0.0040, 2V(Calc)=0, 2V(Meas)=15-20.

Calculated Properties of Fraipontite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=3.44 gm/cc
note: Specific Gravity of Fraipontite =3.53 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.02
Boson Index = 0.98
Help on Photoelectric: Photoelectric: PEFraipontite = 20.53 barns/electron
U=PEFraipontite x rElectron Density= 70.55 barns/cc.
Help on Radioactivity: Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Fraipontite is Not Radioactive

Fraipontite Classification

Help on  Dana Class: Dana Class: 71.01.02c.04 (71)Phyllosilicate Sheets of Six-Membered Rings
  (71.01)with 1:1 layers
  (71.01.02c)Serpentine group (Amesite subgroup)
71.01.02c.01 Amesite Mg2Al(SiAl)O5(OH)4 C1 1
71.01.02c.02 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m
71.01.02c.03 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2
71.01.02c.04 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m
71.01.02c.05 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 63 6
71.01.02c.06 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1
71.01.02c.07 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 31m 3m
Help on  Strunz Class: Strunz Class: 09.ED.15 09 - SILICATES (Germanates)
  09.E - Phyllosilicates
  09.ED -Phyllosilicates with kaolinite layers
09.ED.15 Clinochrysotile? Mg3Si2O5(OH)4 Cc, C 2/m Mono
09.ED.15 Berthierine (Fe,Fe,Al,Mg)2-3(Si,Al)2O5(OH)4 Cm m
09.ED.15 Brindleyite (Ni,Mg,Fe)2Al(SiAl)O5(OH)4 C 2 2
09.ED.15 Amesite Mg2Al(SiAl)O5(OH)4 C1 1
09.ED.15 Antigorite (Mg,Fe)3Si2O5(OH)4 Cm m
09.ED.15 Caryopilite (Mn,Mg,Zn,Fe)3(Si,As)2O510(OH,Cl)4 Cm or C 2/m Mono
09.ED.15 Fraipontite (Zn,Al)3(Si,Al)2O5(OH)4 Cm m
09.ED.15 Cronstedtite Fe2Fe(SiFe)O5(OH)4 P 31m 3m
09.ED.15 Chrysotile Mg3Si2O5(OH)4 A2/m 2/m
09.ED.15 Nepouite Ni3Si2O5(OH)4 Ccm21 mm2
09.ED.15 Greenalite (Fe,Fe)2-3Si2O5(OH)4 Unk Mono
09.ED.15 Kellyite (Mn,Mg,Al)3(Si,Al)2O5(OH)4 P 63 6
09.ED.15 Maufite? (Mg,Ni)Al4Si3O13•4(H2O)(?) Mono ? Mono
09.ED.15 Lizardite Mg3Si2O5(OH)4 P1 1
09.ED.15 Orthochrysotile? Mg3Si2O5(OH)4 Unk Ortho
09.ED.15 Manandonite Li2Al4[(Si2AlB)O10](OH)8 C1 1
09.ED.15 Pecoraite Ni3Si2O5(OH)4 C 2/m 2/m
09.ED.15 Parachrysotile? Mg3Si2O5(OH)4 Unk Ortho

Other Fraipontite Information

Help on References: References: NAME( Ford32) 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 Fraipontite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - EUROmin Project
4 - Ecole des Mines de Paris
5 - Franklin Minerals(Dunn)
6 - GeoScienceWorld
7 - Google Images
8 - Google Scholar
9 - Handbook of Mineralogy (MinSocAm)
10 - Handbook of Mineralogy (UofA)
11 - MinDAT
12 - Mineralienatlas (Deutsch)
13 - Online Mineral Museum
14 - QUT Mineral Atlas
15 - Ruff.Info

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Dana No: 71.01.02c.04 Strunz No: 09.ED.15





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