Henritermierite Mineral Data

Henritermierite Mineral Data +

General Henritermierite Information

Chemical Formula:

Ca3(Mn,Al)2(SiO4)2(OH)4

Composition:

Molecular Weight = 468.33 gm

Calcium 25.67 % Ca 35.92 % CaO

Manganese 17.60 % Mn 25.28 % Mn₂O₃

Aluminum 2.88 % Al 5.44 % Al₂O₃

Silicon 11.99 % Si 25.66 % SiO₂

Hydrogen 0.86 % H 7.69 % H₂O

Oxygen 41.00 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca₃Mn³⁺_1.5Al_0.5(SiO₄)₂(OH)₄

IMA Status:

Approved IMA 1969

Locality:

Link to MinDat.org Location Data.

Synonym:

ICSD 51249

PDF 22-150

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Henritermierite Crystallography

Axial Ratios:

a:c = 1:0.96125

Cell Dimensions:

a = 12.39, c = 11.91, Z = 8; V = 1,828.33 Den(Calc)= 3.40

Crystal System:

Tetragonal - Ditetragonal DipyramidalH-M Symbol (4/m 2/m 2/m) Space Group: I 4₁/acd

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

By Intensity(I/I_o): 2.75(1), 2.516(0.8), 4.37(0.6),

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Forms: [ 1 0 2] [ 1 1 0] [ 1 0 0]

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Crystal Structure:

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Armbruster T , Kohler T , Libowitzky E , Friedrich A , Miletich R , Kunz M , Medenbach O , Gutzmer J , American Mineralogist , 86 (2001) p.147-158, Structure, compressibility, hydrogen bonding, and dehydration of the tetragonal, Mn3+ hydrogarnet, henritermierite, Sample: T = 100 K

View Additional jPOWD Structure files for Henritermierite
[1] [2] [3]

Physical Properties of Henritermierite

Cleavage:

None

Color:

Clove brown, Orange brown.

Density:

3.34

Fracture:

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

Luster:

Vitreous (Glassy)

Optical Properties of Henritermierite

Gladstone-Dale:

CI meas= 0.033 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.05 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2301,KPDmeas= 0.2343,KC= 0.2423

Optical Data:

Uniaxial (+), w=1.765, e=1.8, bire=0.0350.

Calculated Properties of Henritermierite

Electron Density:

r_electron=3.31 gm/cc
note: r_{Henritermierite}=3.34 gm/cc.

Fermion Index

Fermion Index = 0.00614
Boson Index = 0.99386

Photoelectric:

PE_{Henritermierite}= 8.14 barns/electron
U=PE_{Henritermierite} x r_electron= 26.92 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Henritermierite is Not Radioactive

Henritermierite Classification

Dana Class:

51.4.4.1 (51)Nesosilicate Insular SiO4 Groups Only

(51.4)with cations in [6] and >[6] coordination

(51.4.4)Dana Group

51.4.4.1 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 4₁/acd 4/m 2/m 2/m

51.4.4.2 Holtstamite! Ca3(Al,Mn)2(SiO4)2(OH)4 I 4₁/acd 4/m 2/m 2/m

Strunz Class:

VIII/A.08-160 VIII - Silicates

VIII/A - Nesosilicates with [SiO4]4-groups, cations of octahedral and cubic orientation [8+6]

VIII/A.08 - Garnet group, Pyrope - Henritermierite

VIII/A.08-10 Pyrope Mg3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-20 Almandine Fe3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-30 Spessartine Mn3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-40 Calderite (Mn,Ca)3(Fe,Al)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-50 Knorringite Mg3Cr2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-60 Majorite Mg3(Fe,Al,Si)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-70 Grossular Ca3Al2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-80 Hibschite Ca3Al2(SiO4)3-x(OH)4x(x=0.2-1.5) I a3d 4/m 3 2/m

VIII/A.08-90 Katoite Ca3Al2(SiO4)3-x(OH)4xx=1.5-3 I a3d 4/m 3 2/m

VIII/A.08-100 Hydrougrandite? (Ca,Mg,Fe)3(Fe,Al)2(SiO4)3-x(OH)4x I a3d 4/m 3 2/m

VIII/A.08-110 Andradite Ca3Fe2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-120 Schorlomite Ca3(Ti,Fe,Al)2[(Si,Fe,Fe)O4]3 I a3d 4/m 3 2/m

VIII/A.08-125 Morimotoite Ca3TiFeSi3O12 I a3d 4/m 3 2/m

VIII/A.08-130 Uvarovite Ca3Cr2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-138 Yamatoite! (Mn,Ca)3(V,Al)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-140 Goldmanite Ca3(V,Al,Fe)2(SiO4)3 I a3d 4/m 3 2/m

VIII/A.08-150 Kimzeyite Ca3(Zr,Ti)2(Si,Al,Fe)3O12 I a3d 4/m 3 2/m

VIII/A.08-160 Henritermierite Ca3(Mn,Al)2(SiO4)2(OH)4 I 4₁/acd 4/m 2/m 2/m

Other Henritermierite 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 Henritermierite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - EUROmin Project 4 -Google Images 5 -Google Scholar 6 -Handbook of Mineralogy (MinSocAm) 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 - WWW-MINCRYST 14 -École des Mines de Paris

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Henritermierite

Ca3(Mn,Al)2(SiO4)2(OH)4
Dana No: 51.4.4.1 Strunz No: VIII/A.08-160
Locality:

Notes: