Garyansellite Mineral Data

Garyansellite Mineral Data +

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General Garyansellite Information

Chemical Formula:

(Mg,Fe+++)3(PO4)2(OH,O)·1,5(H2O)

Composition:

Molecular Weight = 330.29 gm

Magnesium 16.56 % Mg 27.46 % MgO

Iron 12.68 % Fe 18.13 % Fe₂O₃

Phosphorus 18.76 % P 42.98 % P₂O₅

Hydrogen 1.14 % H 10.23 % H₂O

Oxygen 50.86 % O

______ ______

100.00 % 98.79 % = TOTAL OXIDE

Empirical Formula:

3(Mg_0.75)3(Fe³⁺_0.25)(PO₄)₂(OH)_0.75O_0.25·1.5(H₂O)

IMA Status:

Approved IMA 1984

Locality:

Link to MinDat.org Location Data.

Garyansellite Image

Images:

Garyansellite

Comments: Brown crystalline garyansellite with quartz.
Location: Rapid Creek, Yukon Territory, Canada. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Garyansellite Crystallography

Axial Ratios:

a:b:c =0.9557:1:0.8289

Cell Dimensions:

a = 9.452, b = 9.89, c = 8.198, Z = 4; V = 766.35 Den(Calc)= 2.86

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pbna

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

By Intensity(I/I_o): 3.156(1), 2.705(0.6), 4.93(0.5),

Physical Properties of Garyansellite

Cleavage:

[001] Good

Color:

Brown.

Density:

3.16

Diaphaniety:

Translucent

Hardness:

4 - Fluorite

Luster:

Vitreous (Glassy)

Streak:

brown

Optical Properties of Garyansellite

Gladstone-Dale:

CI meas= -0.053 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.164 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2624,KPDmeas= 0.2374,KC= 0.2254

Optical Data:

Biaxial (-), a=1.733, b=1.757, g=1.761, bire=0.0280, 2V(Calc)=42, 2V(Meas)=55.

Calculated Properties of Garyansellite

Electron Density:

r_electron=3.14 gm/cc
note: r_{Garyansellite}=3.16 gm/cc.

Fermion Index

Fermion Index = 0.01949
Boson Index = 0.98051

Photoelectric:

PE_{Garyansellite}= 5.01 barns/electron
U=PE_{Garyansellite} x r_electron= 15.75 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Garyansellite is Not Radioactive

Garyansellite Classification

Dana Class:

40.3.2.5 (40)Hydrated Phosphates, etc

(40.3)where (A++)3 (XO4)2 · x(H2O)

(40.3.2)Dana Group

40.3.2.1 Phosphoferrite (Fe,Mn)3(PO4)2·3(H2O) Pmna 2/m 2/m 2/m

40.3.2.2 Kryzhanovskite MnFe2(PO4)2(OH)2·(H2O) Pbna 2/m 2/m 2/m

40.3.2.3 Reddingite Mn3(PO4)2·3(H2O) Pbna 2/m 2/m 2/m

40.3.2.4 Landesite (Mn,Mg)9Fe3(PO4)8(OH)3·9(H2O) Pmna 2/m 2/m 2/m

40.3.2.5 Garyansellite (Mg,Fe)3(PO4)2(OH,O)·1,5(H2O) Pbna 2/m 2/m 2/m

Strunz Class:

VII/C.08-30 VII - Phosphates, Arsenates and Vanadates

VII/C - Water-bearing phosphates without unfamiliar anions. cations of medium and small size: Be and Mn, Fe, Cu, Zn, Mg

VII/C.08 - Phosphoferrite - Kryzhanovskite series

VII/C.08-10 Phosphoferrite (Fe,Mn)3(PO4)2·3(H2O) Pmna 2/m 2/m 2/m

VII/C.08-20 Reddingite Mn3(PO4)2·3(H2O) Pbna 2/m 2/m 2/m

VII/C.08-30 Garyansellite (Mg,Fe)3(PO4)2(OH,O)·1,5(H2O) Pbna 2/m 2/m 2/m

VII/C.08-40 Kryzhanovskite MnFe2(PO4)2(OH)2·(H2O) Pbna 2/m 2/m 2/m

Other Garyansellite Information

References:

PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Garyansellite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (UofA) 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas 12 -École des Mines de Paris

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

Garyansellite

(Mg,Fe+++)3(PO4)2(OH,O)·1,5(H2O)
Dana No: 40.3.2.5 Strunz No: VII/C.08-30
Locality:

Notes: