Ferrosaponite Mineral Data

Ferrosaponite Mineral Data

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General Ferrosaponite Information

Chemical Formula:

Ca0.3(Fe++,Mg,Fe+++)3(Si,Al)4O10(OH)2·4(H2O)

Composition:

Molecular Weight = 526.49 gm

Potassium 0.07 % K 0.09 % K₂O

Sodium 0.17 % Na 0.24 % Na₂O

Calcium 2.36 % Ca 3.30 % CaO

Magnesium 3.92 % Mg 6.51 % MgO

Aluminum 5.18 % Al 9.78 % Al₂O₃

Iron 22.38 % Fe 21.02 % FeO / 8.64 % Fe₂O₃

Silicon 15.31 % Si 32.75 % SiO₂

Hydrogen 1.98 % H 17.67 % H₂O

Oxygen 48.62 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ca_0.31Na_0.04K_0.01Fe²⁺_1.54Mg_0.85Fe³⁺_0.45Si_2.87Al_1.01Fe³⁺_0.12O_9.67(OH)_2.33·4(H₂O)

Environment:

Hydrothermal mineral. Smectite group

IMA Status:

Approved IMA 2003 (Dana # Added)

Locality:

Levoberezhye "Iceland Spar" deposit near the Nizhnyaya Tunguska River, Evenkiya, Siberia, Russia. Link to MinDat.org Location Data.

Name Origin:

Named as the Fe2+ dominant analog of saponte.

Synonym:

IMA2002-028

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Ferrosaponite Crystallography

Axial Ratios:

a:b:c =0.5762:1:1.5731

Cell Dimensions:

a = 5.363, b = 9.306, c = 14.64, Z = 2; beta = 94.98° V = 727.90 Den(Calc)= 2.40

Crystal System:

MonoclinicSpace Group: C?

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

By Intensity(I/I_o): 3.03(1)(031), 1.549(0.9)(060), 2.429(0.9)(006),2.585(0.9)(201), 4.72(0.9)(020), 7.37(0.9)(002), 3.8(0.8),

Physical Properties of Ferrosaponite

Cleavage:

[001] Perfect

Color:

Dark green, Brownish green.

Density:

2.49

Diaphaniety:

Translucent

Habit:

Columnar - Forms columns

Habit:

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

Habit:

Spherical - Spherical, rounded aggregates.

Hardness:

2 - Gypsum

Luster:

Vitreous (Glassy)

Streak:

green

Optical Properties of Ferrosaponite

Optical Data:

Biaxial (-), a=1.448, b=1.641, g=1.642, bire=0.1940, 2V(Calc)=6, 2V(Meas)=5. Dispersion Calculated α index.

Calculated Properties of Ferrosaponite

Electron Density:

r_electron=2.40 gm/cc
note: r_{Ferrosaponite}=2.40 gm/cc.

Fermion Index

Fermion Index = 0.01608
Boson Index = 0.98392

Photoelectric:

PE_{Ferrosaponite}= 7.68 barns/electron
U=PE_{Ferrosaponite} x r_electron= 18.46 barns/cc.

Radioactivity:

GRapi = 1.10 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Ferrosaponite - barely detectable

Ferrosaponite Classification

Dana Class:

71.3.1b.2a (71)Phyllosilicate Sheets of Six-Membered Rings

(71.3)with 2:1 clays

(71.3.1b)Smectite group (Trioctahedral Smectites)

71.3.1b.1 Sobotkite? (K,Ca0.5)0.33(Mg,Al)3(Si3Al)O10(OH)2·1-5(H2O) Unk. Mono

71.3.1b.2 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m

71.3.1b.2a Ferrosaponite ! Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C? Mono

71.3.1b.3 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m

71.3.1b.4 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m

71.3.1b.5 Pimelite Ni3Si4O10(OH)2·4(H2O) Unk. Hex

71.3.1b.6 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2·n(H2O) Unk (ORTH ?) Mono

71.3.1b.7 Yakhontovite (Ca,K)0.5(Cu,Fe,Mg)2Si4O10(OH)2·3(H2O) C 2/m 2/m

71.3.1b.8 Zincsilite Zn3Si4O10(OH)2·4(H2O)(?) C 2/m ? 2/m

Strunz Class:

VIII/H.20-27 VIII - Silicates

VIII/H - Phyllosilicates (layered) Mica like with [Si4O10]4- and related groups

VIII/H.20 - Hectorite - Zincsilite series

VIII/H.20-10 Hectorite Na0,3(Mg,Li)3Si4O10(OH)2 C 2/m 2/m

VIII/H.20-20 Saponite (Ca/2,Na)0,3(Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m

VIII/H.20-27 Ferrosaponite Ca0.3(Fe,Mg,Fe)3(Si,Al)4O10(OH)2·4(H2O) C? Mono

VIII/H.20-30 Spadaite MgSiO2(OH)2·(H2O)(?) None

VIII/H.20-40 Stevensite (Ca0.5,Na)0.33(Mg,Fe)3Si4O10(OH)2·n(H2O) Unk (ORTH ?) Mono

VIII/H.20-50 Sauconite Na0,3Zn3(Si,Al)4O10(OH)2·4(H2O) C 2/m 2/m

VIII/H.20-60 Zincsilite Zn3Si4O10(OH)2·4(H2O)(?) C 2/m ? 2/m

Other Ferrosaponite Information

References:

NAME( AmMin, 89:467) PHYS. PROP.(AmMin, 89:467) OPTIC PROP.(AmMin, 89:467)

See Also:

Links to other databases for Ferrosaponite :
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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Ferrosaponite

Ca0.3(Fe++,Mg,Fe+++)3(Si,Al)4O10(OH)2·4(H2O)
Dana No: 71.3.1b.2a Strunz No: VIII/H.20-27
Locality:

Notes: