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 % As2 O5
Hydrogen 0.87 % H 7.74 % H2 O
Oxygen 34.36 % O
______ ______
100.00 % 98.28 % = TOTAL OXIDE
Empirical Formula:
Mg2.25 Mn2+ 0.75 Zn2 (AsO4 )(OH)4 O2
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
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 - Prismatic H-M Symbol (2/m) Space Group: C 2/m
X Ray Diffraction:
By Intensity(I/Io ): 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:
PEMagnesiochlorophoenicite = 27.50 barns/electronU=PEMagnesiochlorophoenicite x r Electron 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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Magnesiochlorophoenicite
(Mg,Mn)3Zn2(AsO4)(OH,O)6
Dana No: 41.01.01.02 Strunz No: 08.BE.35
Locality:
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