Magnesium-chlorophoenicite Mineral Data

Magnesium-chlorophoenicite Mineral Data

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General Magnesium-chlorophoenicite Information

Chemical Formula:

(Mg,Mn)3Zn2(AsO4)(OH,O)6

Composition:

Molecular Weight = 465.62 gm

Magnesium 11.74 % Mg 19.48 % MgO

Manganese 8.85 % Mn 11.43 % MnO

Zinc 28.09 % Zn 34.96 % ZnO

Arsenic 16.09 % As 24.68 % As₂O₅

Hydrogen 0.87 % H 7.74 % H₂O

Oxygen 34.36 % O

______ ______

100.00 % 98.28 % = TOTAL OXIDE

Empirical Formula:

Mg_2.25Mn²⁺_0.75Zn₂(AsO₄)(OH)₄O₂

IMA Status:

Valid Species (Pre-IMA) 1935

Locality:

Link to MinDat.org Location Data.

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Magnesium-chlorophoenicite Crystallography

Axial Ratios:

a:b:c =6.9694:1:2.224

Cell Dimensions:

a = 23.02, b = 3.303, c = 7.346, Z = 2; beta = 106.22° V = 536.32 Den(Calc)= 2.88

Crystal System:

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

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

By Intensity(I/I_o): 3.123(1), 3.723(1), 2.641(0.8),

Physical Properties of Magnesium-chlorophoenicite

Color:

Colorless, White.

Density:

3.37

Diaphaniety:

Transparent to Translucent

Hardness:

3-3.5 - Calcite-Copper Penny

Luster:

Vitreous - Pearly

Optical Properties of Magnesium-chlorophoenicite

Gladstone-Dale:

CI meas= -0.091 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.276 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2336,KPDmeas= 0.1996,KC= 0.183

Optical Data:

Biaxial (+), a=1.669, b=1.672, g=1.677, bire=0.0080

Calculated Properties of Magnesium-chlorophoenicite

Electron Density:

r_electron=3.22 gm/cc
note: r_{Magnesium-chlorophoenicite}=3.37 gm/cc.

Fermion Index

Fermion Index = 0.02342
Boson Index = 0.97658

Photoelectric:

PE_{Magnesium-chlorophoenicite}= 27.50 barns/electron
U=PE_{Magnesium-chlorophoenicite} x r_electron= 88.67 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Magnesium-chlorophoenicite is Not Radioactive

Magnesium-chlorophoenicite Classification

Dana Class:

41.1.1.2 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen

(41.1)where (A++)m (XO4)p Zq, with m:p>4:1

(41.1.1)Dana Group

41.1.1.1 Chlorophoenicite (Mn,Mg)3Zn2(AsO4)(OH,O)6 C 2/m 2/m

41.1.1.2 Magnesium-chlorophoenicite (Mg,Mn)3Zn2(AsO4)(OH,O)6 C 2/m 2/m

41.1.1.3 Jarosewichite Mn3Mn(AsO4)(OH)6 C 222,C mm2,C 2m2(/n) Ortho

Strunz Class:

VII/B.17-10 VII - Phosphates, Arsenates and Vanadates

VII/B - Waterfree phosphates with unfamiliar anions F, Cl, O,OH, cations of medium size: Mg, Mn, Fe, Cu, Zn, Pseudomalachite group and related compounds

VII/B.17 - Pseudomalachite group, Magnesium-chlorophoenicite - Jarosewichite series

VII/B.17-10 Magnesium-chlorophoenicite (Mg,Mn)3Zn2(AsO4)(OH,O)6 C 2/m 2/m

VII/B.17-20 Chlorophoenicite (Mn,Mg)3Zn2(AsO4)(OH,O)6 C 2/m 2/m

VII/B.17-30 Jarosewichite Mn3Mn(AsO4)(OH)6 C 222,C mm2,C 2m2(/n) Ortho

Other Magnesium-chlorophoenicite 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 Magnesium-chlorophoenicite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 -Google Images 4 -Google Scholar 5 -MinDAT 6 -MinMax(Deutsch) 7 -MinMax(English) 8 -Mineralienatlas (Deutsch) 9 -QUT Mineral Atlas 10 -École des Mines de Paris

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Print or Cut-and-Paste your Magnesium-chlorophoenicite Specimen Label here :

Magnesium-chlorophoenicite

(Mg,Mn)3Zn2(AsO4)(OH,O)6
Dana No: 41.1.1.2 Strunz No: VII/B.17-10
Locality:

Notes: