Manganosegelerite Mineral Data

Manganosegelerite Mineral Data +

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General Manganosegelerite Information

Chemical Formula:

(Mn,Ca)(Mn,Fe++,Mg)Fe+++(PO4)2(OH)·4(H2O)

Composition:

Molecular Weight = 426.99 gm

Calcium 3.75 % Ca 5.25 % CaO

Magnesium 1.71 % Mg 2.83 % MgO

Manganese 12.87 % Mn 16.61 % MnO

Aluminum 0.63 % Al 1.19 % Al₂O₃

Iron 15.70 % Fe 5.05 % FeO / 16.83 % Fe₂O₃

Phosphorus 14.51 % P 33.24 % P₂O₅

Hydrogen 2.12 % H 18.99 % H₂O

Oxygen 48.71 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Mn²⁺_0.6Ca_0.4Mn²⁺_0.4Fe²⁺_0.3Mg_0.3Fe³⁺_0.9Al_0.1(PO₄)₂(OH)·4(H₂O)

Environment:

In fractures in granite pegmatite.

IMA Status:

Approved IMA 1992

Locality:

Mt. Vasin-Myl'k, Voron'i massif, Kola Peninsula, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the manganese analog of segelerite.

Synonym:

IMA1984-055

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Manganosegelerite Crystallography

Axial Ratios:

a:b:c =0.7924:1:0.3942

Cell Dimensions:

a = 14.89, b = 18.79, c = 7.408, Z = 8; V = 2,072.63 Den(Calc)= 2.74

Crystal System:

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

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

By Intensity(I/I_o): 9.39(1), 2.86(0.9), 4.7(0.5),

Physical Properties of Manganosegelerite

Cleavage:

[001] Indistinct

Color:

Yellow, Yellow green.

Density:

2.76

Diaphaniety:

Transparent

Habit:

Granular - Generally occurs as anhedral to subhedral crystals in matrix.

Habit:

Prismatic - Crystals Shaped like Slender Prisms (e.g. tourmaline).

Habit:

Subhedral Crystals - Occurs as crystals which tend to exhibit a recognizable crystal shape.

Hardness:

3-4 - Calcite-Fluorite

Luster:

Vitreous (Glassy)

Streak:

yellow

Optical Properties of Manganosegelerite

Gladstone-Dale:

CI meas= -0.057 (Good) - where the CI = (1-KPDmeas/KC)
CI calc= -0.065 (Fair) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2453,KPDmeas= 0.2435,KC= 0.2303

Optical Data:

Biaxial (+), a=1.657, b=1.668, g=1.691, bire=0.0340, 2V(Calc)=72, 2V(Meas)=70-75. Dispersion r < v marked.

Pleochroism (x):

yellow.

Pleochroism (z):

pale yellow.

Calculated Properties of Manganosegelerite

Electron Density:

r_electron=2.74 gm/cc
note: r_{Manganosegelerite}=2.76 gm/cc.

Fermion Index

Fermion Index = 0.00532
Boson Index = 0.99468

Photoelectric:

PE_{Manganosegelerite}= 9.07 barns/electron
U=PE_{Manganosegelerite} x r_electron= 24.87 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Manganosegelerite is Not Radioactive

Manganosegelerite Classification

Dana Class:

42.11.1.3 (42)Hydrated Phosphates, etc., Containing Hydroxyl or Halogen

(42.11)where (AB)4 (XO4)3 Zq · x(H2O)

(42.11.1)Dana Group

42.11.1.1 Overite CaMgAl(PO4)2(OH)·4(H2O) Pcca 2/m 2/m 2/m

42.11.1.2 Segelerite CaMgFe(PO4)2(OH)·4(H2O) Pcca 2/m 2/m 2/m

42.11.1.3 Manganosegelerite (Mn,Ca)(Mn,Fe,Mg)Fe(PO4)2(OH)·4(H2O) P bca 2/m 2/m 2/m

42.11.1.4 Lunokite (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2(OH)·4(H2O) P bca 2/m 2/m 2/m

42.11.1.5 Wilhelmvierlingite CaMnFe(PO4)2(OH)·2(H2O) P bca 2/m 2/m 2/m

42.11.1.6 Kaluginite* (Mn,Ca)MgFe(PO4)2(OH)·4(H2O) C cca 2/m 2/m 2/m

42.11.1.7 Juonniite! CaMgSc(PO4)2(OH)·4(H2O) P bca 2/m 2/m 2/m

Strunz Class:

VII/D.28-50 VII - Phosphates, Arsenates and Vanadates

VII/D - Water-bearing phosphates with unfamiliar anions, cations of very big and medium size: Al, Mg and Ca, Na, K

VII/D.28 - Overite- Segelerite group

VII/D.28-10 Overite CaMgAl(PO4)2(OH)·4(H2O) Pcca 2/m 2/m 2/m

VII/D.28-20 Segelerite CaMgFe(PO4)2(OH)·4(H2O) Pcca 2/m 2/m 2/m

VII/D.28-25 Juonniite! CaMgSc(PO4)2(OH)·4(H2O) P bca 2/m 2/m 2/m

VII/D.28-30 Wilhelmvierlingite CaMnFe(PO4)2(OH)·2(H2O) P bca 2/m 2/m 2/m

VII/D.28-40 Lunokite (Mn,Ca)(Mg,Fe,Mn)Al(PO4)2(OH)·4(H2O) P bca 2/m 2/m 2/m

VII/D.28-50 Manganosegelerite (Mn,Ca)(Mn,Fe,Mg)Fe(PO4)2(OH)·4(H2O) P bca 2/m 2/m 2/m

Other Manganosegelerite Information

References:

NAME( AntBidBlaNic4) PHYS. PROP.(Am.Min.,Vol.79,p185,1994) OPTIC PROP.(AntBidBlaNic4)

See Also:

Links to other databases for Manganosegelerite :
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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Manganosegelerite

(Mn,Ca)(Mn,Fe++,Mg)Fe+++(PO4)2(OH)·4(H2O)
Dana No: 42.11.1.3 Strunz No: VII/D.28-50
Locality:

Notes: