Arseniopleite Mineral Data

Arseniopleite Mineral Data +

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General Arseniopleite Information

Chemical Formula:

(Ca,Na)(Na,Pb)Mn++(Mn++,Mg,Fe++)2(AsO4)3

Composition:

Molecular Weight = 737.72 gm

Sodium 3.74 % Na 5.04 % Na₂O

Calcium 3.80 % Ca 5.32 % CaO

Magnesium 3.29 % Mg 5.46 % MgO

Manganese 25.32 % Mn 32.69 % MnO

Iron 4.54 % Fe 5.84 % FeO

Arsenic 30.47 % As 46.73 % As₂O₅

Lead 2.81 % Pb 2.92 % Pb₂O

Oxygen 26.03 % O

______ ______

100.00 % 104.01 % = TOTAL OXIDE

Empirical Formula:

Ca_0.7Na_1.2Pb_0.1Mn²⁺_3.4MgFe²⁺_0.6(AsO₄)₃

Environment:

Mn-rich member of a series with caryinite. Revalidated 2003.

IMA Status:

Valid Species (Pre-IMA) 1888

Locality:

Sjo Mine, Grythytte Parish, Orebro, Sweden. Link to MinDat.org Location Data.

Name Origin:

Named from the Latin for the element As, and Greek for 'more' because it adds to the number of related minerals already described.

Arseniopleite Image

Images:

Arseniopleite

Comments: Massive, orange arseniopleite.
Location: Sj?gruvan, Grythyttan, ?rebro, Sweden. Scale: Not Given.
© Tom Loomis / Dakota Matrix

Arseniopleite Crystallography

Axial Ratios:

a:b:c =0.5225:1:0.8687

Cell Dimensions:

a = 6.8113, b = 13.0358, c = 11.3245, Z = 4; beta = 100.25° V = 989.46 Den(Calc)= 4.95

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: I2/a

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

By Intensity(I/I_o): 2.83(1), 2.68(0.6), 1.693(0.5),2.99(0.5), 2.79(0.4), 3.27(0.4), 4.13(0.4), 6.52(0.4),

Crystal Structure:

Mouse
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Tait K T , Hawthorne F C , The Canadian Mineralogist , 41 (2003) p.71-77, Refinement of the crystal structure of arseniopleite: Confirmation of its status, as a valid species

Physical Properties of Arseniopleite

Cleavage:

[???] Good

Color:

Cherry, Reddish brown.

Density:

4.22 - 4.29, Average = 4.25

Diaphaniety:

Opaque

Fracture:

Conchoidal - Fractures developed in brittle materials characterized by smoothly curving surfaces, (e.g. quartz).

Habit:

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

Hardness:

3.5 - Copper Penny

Luster:

Greasy (Oily)

Streak:

yellowish brown

Optical Properties of Arseniopleite

Optical Data:

NCalc= 1.9 - from Gladstone-Dale relationship (KC = 0.1828) where Ncalc=Dcalc*KC+1
NCalc= 1.78 - from Gladstone-Dale relationship (KC = 0.1828) where Ncalc=Dmeas*KC+1

Calculated Properties of Arseniopleite

Electron Density:

r_electron=4.60 gm/cc
note: r_{Arseniopleite}=4.95 gm/cc.

Fermion Index

Fermion Index = 0.01064
Boson Index = 0.98936

Photoelectric:

PE_{Arseniopleite}= 76.32 barns/electron
U=PE_{Arseniopleite} x r_electron= 351.32 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Arseniopleite is Not Radioactive

Arseniopleite Classification

Dana Class:

38.2.2.2 (38)Anhydrous Phosphates, etc

(38.2)(A+ B++)5 (XO4)3

(38.2.2)Alluaudite-Wyllieite Group (Alluaudite Subgroup)

38.2.2.1 Caryinite (Na,Pb)(Ca,Na)(Ca,Mn)(Mn,Mg)2(AsO4)3 I2/c 2/m

38.2.2.2 Arseniopleite (Ca,Na)(Na,Pb)Mn(Mn,Mg,Fe)2(AsO4)3 I2/a 2/m

Strunz Class:

VII/A.06-110 VII - Phosphates, Arsenates and Vanadates

VII/A - Waterfree phosphates [PO4]3- without unfamiliar anions, cations of medium and big size: Mg, Mn,Fe, Cu, Zn, and Ca, Na

VII/A.06 - Alluaudite- Hagendorfite group

VII/A.06-10 Qingheiite Na2(Mn,Mg,Fe)(Al,Fe)(PO4)3 P 2₁/n 2/m

VII/A.06-20 Bobfergusonite Na2Mn5FeAl(PO4)6 P 2₁/n 2/m

VII/A.06-30 Ferrowyllieite (Na,Ca,Mn)(Fe,Mn)(Fe,Fe,Mg)Al(PO4)3 P 2₁/n 2/m

VII/A.06-40 Wyllieite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 2₁/n 2/m

VII/A.06-50 Rosemaryite (Na,Ca,Mn)(Mn,Fe)(Fe,Fe,Mg)Al(PO4)3 P 2₁/n 2/m

VII/A.06-60 Ferroalluaudite NaCaFe(Fe,Mn,Fe,Mg)2(PO4)3 C 2/a 2/m

VII/A.06-70 Alluaudite NaCaFe(Mn,Fe,Fe,Mg)2(PO4)3 C 2/c 2/m

VII/A.06-80 Maghagendorfite NaMgMn(Fe,Fe)2(PO4)3 I 2₁/a 2/m

VII/A.06-85 Ferrohagendorfite* (Na,Ca)2Fe(Fe,Fe)2(PO4)3 I 2₁/a 2/m

VII/A.06-90 Hagendorfite NaCaMn(Fe,Fe,Mg)2(PO4)3 I 2₁/a 2/m

VII/A.06-100 Varulite NaCaMn(Mn,Fe,Fe)2(PO4)3 C 2/c 2/m

VII/A.06-110 Arseniopleite (Ca,Na)(Na,Pb)Mn(Mn,Mg,Fe)2(AsO4)3 I2/a 2/m

VII/A.06-120 Caryinite (Na,Pb)(Ca,Na)(Ca,Mn)(Mn,Mg)2(AsO4)3 I2/c 2/m

Other Arseniopleite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, CanMin, v 41, p 72)

See Also:

Links to other databases for Arseniopleite :
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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Arseniopleite

(Ca,Na)(Na,Pb)Mn++(Mn++,Mg,Fe++)2(AsO4)3
Dana No: 38.2.2.2 Strunz No: VII/A.06-110
Locality:

Notes: