Hubeite Mineral Data

Hubeite Mineral Data

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General Hubeite Information

Chemical Formula:

Ca2Mn++Fe+++Si4O12(OH)(H2O)2

Composition:

Molecular Weight = 544.27 gm

Calcium 15.61 % Ca 21.84 % CaO

Manganese 8.78 % Mn 11.34 % MnO

Aluminum 0.20 % Al 0.37 % Al₂O₃

Iron 9.75 % Fe 13.94 % Fe₂O₃

Silicon 20.64 % Si 44.16 % SiO₂

Hydrogen 0.93 % H 8.27 % H₂O

Oxygen 44.09 % O

______ ______

100.00 % 99.93 % = TOTAL OXIDE

Empirical Formula:

Ca₂Mn²⁺_0.87Ca_0.12Fe³⁺_0.95Al_0.04Si₄O₁₂(OH)·2(H₂O)

Environment:

Mildly oxidizing conditions in a calc-manganese silicate skarn. 4-membered silicate rings; structure

IMA Status:

Approved IMA 2002 (Dana # Added)

Locality:

Dayan mine near Huangshi, Hubei Province, China. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Synonym:

IMA2000-022

Hubeite Image

Images:

Hubeite Inesite

Comments: Brown hubeite aggregates accompanied by prismatic pinkish inesite crystals.
Location: Fengjiashan Mine, Daye, Hubei China. Scale: 5.3 x 3.7 x 1.1 cm.
© Fabre Minerals

Images:

Hubeite Inesite

Comments: Translucent, deep root beer brown, platy hueite crystals in fan-like groups to 1mm with delicate pink laths of inesite.
Location: Fengjiashan Mine, Daye Co., Huangshi Prefecture, Hubei Province, China. Scale: Picture Size 5 mm.
© Tom Loomis / Dakota Matrix

Hubeite Crystallography

Axial Ratios:

a:b:c =0.7178:1:0.4729

Cell Dimensions:

a = 9.96, b = 13.875, c = 6.562, Z = 2; alpha = 133.19°, beta = 101.5°, gamma = 66.27° V = 593.11 Den(Calc)= 3.05

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 9.072(1)(100), 8.238(0.9)(110), 3.095(0.7)(142), 3.126(0.7)(320), 2.781(0.6)(220), 1.627(0.3)(154,173),

Forms:

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Forms: [ 3 5 2] [ 0 1 1] [ 1 0 1] [ 1 0 0] [ 0 0 1]

Warning: this large pop-up is very compute intensive and may not work well with some computers.

Physical Properties of Hubeite

Cleavage:

[001] Good

Color:

Dark brown, Light brown.

Density:

3.02

Diaphaniety:

Transparent

Fracture:

Brittle - Conchoidal - Very brittle fracture producing small, conchoidal fragments.

Habit:

Aggregates - Made of numerous individual crystals or clusters.

Habit:

Radial - Crystals radiate from a center without producing stellar forms (e.g. stibnite)

Habit:

Rosette - Bundled tabular aggregates resembling rose flower petals.

Hardness:

5.5 - Knife Blade

Luster:

Vitreous (Glassy)

Streak:

pale orange brown

Optical Properties of Hubeite

Gladstone-Dale:

CI meas= 0.035 (Excellent) - where the CI = (1-KPDmeas/KC)
CI calc= 0.044 (Good) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2225,KPDmeas= 0.2247,KC= 0.2329

Optical Data:

Biaxial (-), a=1.667, b=1.679, g=1.69, bire=0.0230

Calculated Properties of Hubeite

Electron Density:

r_electron=3.00 gm/cc
note: r_Hubeite=3.02 gm/cc.

Fermion Index

Fermion Index = 0.01212
Boson Index = 0.98788

Photoelectric:

PE_Hubeite= 7.79 barns/electron
U=PE_Hubeite x r_electron= 23.37 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hubeite is Not Radioactive

Hubeite Classification

Dana Class:

57.2.3.2 (57)Sorosilicate Insular Si3O10 and Larger Noncyclic Groups

(57.2)with [Si4O13] groups

(57.2.3)Dana Group

57.2.3.1 Akatoreite (Mn,Fe)9Al2Si8O24(OH)8 P1 1

57.2.3.2 Hubeite ! Ca2MnFeSi4O12(OH)(H2O)2 P1 1

Strunz Class:

VIII/C.35-15 VIII - Silicates

VIII/C - Sorosilicates, other group-silicates

VIII/C.35 - Ruizite - Akatoreite series

VIII/C.35-10 Ruizite CaMnSi2O6(OH)·2(H2O) P 2₁/c 2/m

VIII/C.35-15 Hubeite Ca2MnFeSi4O12(OH)(H2O)2 P1 1

VIII/C.35-20 Akatoreite (Mn,Fe)9Al2Si8O24(OH)8 P1 1

Other Hubeite Information

References:

NAME( MinRec, Vol 33, p 465) PHYS. PROP.(MinRec, Vol 33, p 465) OPTIC PROP.(MinRec, Vol 33, p 465)

See Also:

Links to other databases for Hubeite :
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

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Print or Cut-and-Paste your Hubeite Specimen Label here :

Hubeite

Ca2Mn++Fe+++Si4O12(OH)(H2O)2
Dana No: 57.2.3.2 Strunz No: VIII/C.35-15
Locality:

Notes: