Graftonite Mineral Data (original) (raw)

General Graftonite Information

Help on Chemical Formula: Chemical Formula:

(Fe++,Mn,Ca)3(PO4)2

Help on Composition: Composition:

Molecular Weight = 351.93 gm

Calcium 3.42 % Ca 4.78 % CaO

Manganese 14.05 % Mn 18.14 % MnO

Iron 28.56 % Fe 36.75 % FeO

Phosphorus 17.60 % P 40.33 % P2O5

Oxygen 36.37 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Help on Empirical Formula: Empirical Formula:

Fe2+1.8Mn2+0.9Ca0.3(PO4)2

Help on IMA Status: IMA Status:

Valid Species (Pre-IMA) 1900

Help on Locality: Locality:

Link to MinDat.org Location Data.

Help on Name Origin: Name Origin:

Named after its locality at Grafton, New Hampshire, USA.

Help on Name Pronunciation: Name Pronunciation:

Graftonite + Pronunciation Say GRAFTONITE

Help on Synonym: Synonym:

ICSD 79905

PDF 35-357

Graftonite Image

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Graftonite Crystallography

Help on Axial Ratios: Axial Ratios:

a:b:c =0.7666:1:0.5332

Help on Cell Dimensions: Cell Dimensions:

a = 8.87, b = 11.57, c = 6.17, Z = 4; beta = 99.2° V = 625.06 Den(Calc)= 3.74

Help on Crystal System: Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: P 21/c

Help on X Ray Diffraction: X Ray Diffraction:

By Intensity(I/Io): 2.86(1), 3.5(0.9), 2.715(0.7),

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| | Calvo C , American Mineralogist , 53 (1968) p.742-750, The crystal structure of graftonite View Additional jPOWD Structure files for Graftonite [1] | | ------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------- |

Physical Properties of Graftonite

Help on Cleavage: Cleavage:

{010} Perfect

Help on Color: Color:

Brown, Pink, Dark brown, Reddish brown.

Help on Density: Density:

3.67 - 3.7, Average = 3.68

Help on Diaphaneity: Diaphaneity:

Translucent

Help on Fracture: Fracture:

Uneven - Flat surfaces (not cleavage) fractured in an uneven pattern.

Help on Habit: Habit:

Lamellar - Thin laminae producing a lamellar structure.

Help on Habit: Habit:

Massive - Granular - Common texture observed in granite and other igneous rock.

Help on Hardness: Hardness:

5 - Apatite

Help on Luminescence: Luminescence:

Non-fluorescent.

Help on Luster: Luster:

Vitreous - Greasy

Help on Streak: Streak:

pale pink

Optical Properties of Graftonite

Help on Gladstone-Dale: Gladstone-Dale:

CI meas= -0.021 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= -0.006 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.1898,KPDmeas= 0.1926,KC= 0.1887
Ncalc = 1.69 - 1.71

Help on Optical Data: Optical Data:

Biaxial (+), a=1.7, b=1.705, g=1.724, bire=0.0240, 2V(Calc)=56, 2V(Meas)=30-60. Dispersion relatively weak.

Help on Pleochroism (x): Pleochroism (x):

none.

Help on Pleochroism (y): Pleochroism (y):

none.

Help on Pleochroism (z): Pleochroism (z):

none.

Calculated Properties of Graftonite

Help on Electron Density: Electron Density:

Bulk Density (Electron Density)=3.60 gm/cc
note: Specific Gravity of Graftonite =3.74 gm/cc.

Help on Fermion Index: Fermion Index:

Fermion Index = 0.0062761334
Boson Index = 0.9937238666

Help on Photoelectric: Photoelectric:

PEGraftonite = 13.52 barns/electron
U=PEGraftonite x rElectron Density= 48.63 barns/cc.

Help on Radioactivity: Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Graftonite is Not Radioactive

Graftonite Classification

Help on Dana Class: Dana Class:

38.03.03.01 (38)Anhydrous Phosphates, etc

(38.03)(A+ B++)3 (XO4)2

(38.03.03)Dana Group

38.03.03.01 Graftonite (Fe,Mn,Ca)3(PO4)2 P 21/c 2/m

38.03.03.02 Beusite (Mn,Fe,Ca,Mg)3(PO4)2 P 21/c 2/m

Help on Strunz Class: Strunz Class:

08.AB.20 08 - PHOSPHATES, ARSENATES, VANADATES

08.A - Phosphates, etc. without additional anions, without H2O

08.AB -With medium-sized cations

08.AB.20 Beusite (Mn,Fe,Ca,Mg)3(PO4)2 P 21/c 2/m

08.AB.20 Graftonite (Fe,Mn,Ca)3(PO4)2 P 21/c 2/m

Other Graftonite Information

Help on References: References:

NAME( Duda&Rejl90) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Ford32)

Help on See Also: See Also:

Links to other databases for Graftonite :
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

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Ask about Graftonite here :
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Print or Cut-and-Paste your Graftonite Specimen Label here :

Graftonite

(Fe++,Mn,Ca)3(PO4)2
Dana No: 38.03.03.01 Strunz No: 08.AB.20
Locality:

Notes: