Magnesiochlorophoenicite Mineral Data

General Magnesiochlorophoenicite 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. Name Origin: Named as the Mg analog of chlorophoenicite. Synonym: Magnesium-chlorophoenicite - Renamed as Magnesiochlorophoenicite by Mineralogical Record, v330 (2008), p131  

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Magnesiochlorophoenicite 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 X Ray Diffraction: By Intensity(I/I_o): 3.123(1), 3.723(1), 2.641(0.8),  

Physical Properties of Magnesiochlorophoenicite

Color: Colorless, White. Density: 3.37 Diaphaneity: Transparent to Translucent Hardness: 3-3.5 - Calcite-Copper Penny Luster: Vitreous - Pearly  

Optical Properties of Magnesiochlorophoenicite

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
Ncalc = 1.53 - 1.62 Optical Data: Biaxial (+), a=1.669, b=1.672, g=1.677, bire=0.0080  

Calculated Properties of Magnesiochlorophoenicite

Electron Density: Bulk Density (Electron Density)=3.22 gm/cc
note: Specific Gravity of Magnesiochlorophoenicite =3.37 gm/cc.
Fermion Index: Fermion Index = 0.02
Boson Index = 0.98 Photoelectric: PE_{Magnesiochlorophoenicite} = 27.50 barns/electron
U=PE_{Magnesiochlorophoenicite} x rElectron Density= 88.67 barns/cc.
Radioactivity: GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Magnesiochlorophoenicite is Not Radioactive  

Magnesiochlorophoenicite Classification

Dana Class: 41.01.01.02 (41)Anhydrous Phosphates, etc. Containing Hydroxyl or Halogen   (41.01)where (A++)m (XO4)p Zq, with m:p>4:1   (41.01.01)Phoenicite Group  

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

 

41.01.01.02 Magnesiochlorophoenicite (Mg,Mn)3Zn2(AsO4)(OH,O)6 C 2/m 2/m

 

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

Strunz Class: 08.BE.35 08 - PHOSPHATES, ARSENATES, VANADATES   08.B - Phosphates, etc. with Additional Anions, without H2O   08.BE -With only medium-sized cations, (OH, etc.):RO4 > 2:1  

08.BE.35 Chlorophoenicite (Mn,Mg)3Zn2(AsO4)(OH,O)6 C 2/m 2/m

 

08.BE.35 Magnesiochlorophoenicite (Mg,Mn)3Zn2(AsO4)(OH,O)6 C 2/m 2/m

 

Other Magnesiochlorophoenicite 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 Magnesiochlorophoenicite :
1 - Am. Min. Crystal Structure Database
2 - Athena
3 - GeoScienceWorld
4 - Google Images
5 - Google Scholar
6 - MinDAT
7 - Mineralienatlas (Deutsch)
8 - Online Mineral Museum
9 - QUT Mineral Atlas
10 - Ruff.Info
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