Ferroceladonite Mineral Data

Ferroceladonite Mineral Data +

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General Ferroceladonite Information

Chemical Formula:

K2Fe++Fe+++Si8O20(OH)4

Composition:

Molecular Weight = 802.59 gm

Potassium 9.74 % K 11.74 % K₂O

Iron 13.92 % Fe 8.95 % FeO / 9.95 % Fe₂O₃

Silicon 27.99 % Si 59.89 % SiO₂

Hydrogen 0.50 % H 4.49 % H₂O

Oxygen 47.84 % O

______ ______

100.00 % 95.02 % = TOTAL OXIDE

Empirical Formula:

K₂Fe²⁺Fe³⁺(Si₈O₂₀)(OH)₄

Environment:

In an altered crystal-vitric tuff associated with ferroaluminoceladonite.

IMA Status:

Approved IMA 1995 (Dana # Added)

Locality:

Hokonui Hills, Southland, New Zealand. Link to MinDat.org Location Data.

Name Origin:

Named from its composition (Fe++) and the French 'celadon,' sea-green, in allusion to its common color.

Synonym:

IMA1995-018

Ferroceladonite Image

Images:

Ferroceladonite

Comments: Micaceous ferro celadonite, comprising schistose rock.
Location: Mikhailovsky Mine, Malkhan Range, Central Transbaikalia, Chita District, Siberia, Russia. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Ferroceladonite Crystallography

Axial Ratios:

a:b:c =0.5787:1:1.1119

Cell Dimensions:

a = 5.27, b = 9.106, c = 10.125, Z = 1; beta = 100.266° V = 478.11 Den(Calc)= 2.79

Crystal System:

Monoclinic - PrismaticH-M Symbol (2/m) Space Group: C 2/m

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

By Intensity(I/I_o): 3.321(1), 3.358(0.86), 3.09(0.6),

Physical Properties of Ferroceladonite

Cleavage:

[001] Perfect

Color:

Dark bluish green.

Density:

3.05

Diaphaniety:

Translucent to opaque

Fracture:

Earthy - Dull, clay-like fractures with no visible crystalline affinities, (e.g. howlite).

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2-2.5 - Gypsum-Finger Nail

Luster:

Earthy (Dull)

Streak:

paler green

Optical Properties of Ferroceladonite

Optical Data:

Biaxial (?), b=1.64

Calculated Properties of Ferroceladonite

Electron Density:

r_electron=2.77 gm/cc
note: r_{Ferroceladonite}=2.79 gm/cc.

Fermion Index

Fermion Index = 0.01626
Boson Index = 0.98374

Photoelectric:

PE_{Ferroceladonite}= 6.17 barns/electron
U=PE_{Ferroceladonite} x r_electron= 17.07 barns/cc.

Radioactivity:

GRapi = 139.42 (Gamma Ray American Petroleum Institute Units)

Estimated Radioactivity from Ferroceladonite - barely detectable

Ferroceladonite Classification

Dana Class:

71.2.2a.6b (71)Phyllosilicate Sheets of Six-Membered Rings

(71.2)with 2:1 Layers

(71.2.2a)Mica Group (Muscovite subgroup)

71.2.2a.1 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m

71.2.2a.2 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono

71.2.2a.3 Chernykhite (Ba,Na)V,Al)2(Si,Al)4O10(OH)2 C 2/c 2/m

71.2.2a.4 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m

71.2.2a.5 Glauconite (K,Na)(Fe,Al,Mg)2(Si,Al)4O10(OH)2 C 2/m 2/m

71.2.2a.6 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m

71.2.2a.6b Ferroceladonite ! K2FeFeSi8O20(OH)4 C 2/m 2/m

71.2.2a.6c Ferro-aluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m

71.2.2a.6d Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m

71.2.2a.6e Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2

71.2.2a.7 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m

71.2.2a.8 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m

71.2.2a.9 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m

71.2.2a.10 Montdorite (K,Na)(Fe,Mn,Mg)2.5[Si4O10](F,OH)2 C 2/c 2/m

71.2.2a.11 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m

71.2.2a.12 Shirokshinite! K(NaMg2)Si4O10F2 C 2/m 2/m

Strunz Class:

VIII/H.10-40 VIII - Silicates

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

VIII/H.10 - Mica group, Muscovite series

VIII/H.10-10 Aluminoceladonite! KAl(Mg,Fe)[]Si4O10(OH)2 2/m

VIII/H.10-20 Ferro-aluminoceladonite! K2Fe2Al2Si8O20(OH)4 C 2/m 2/m

VIII/H.10-30 Celadonite K(Mg,Fe)(Fe,Al)[Si4O10](OH)2 C 2/m 2/m

VIII/H.10-35 Chromceladonite! KCrMg(Si4O10)(OH)2 C 2 2

VIII/H.10-40 Ferroceladonite K2FeFeSi8O20(OH)4 C 2/m 2/m

VIII/H.10-50 Paragonite NaAl2(Si3Al)O10(OH)2 C 2/c,Cc Mono

VIII/H.10-60 Boromuscovite KAl2(Si3B)O10(OH,F)2 C 2/m 2/m

VIII/H.10-70 Muscovite KAl2(Si3Al)O10(OH,F)2 C 2/m 2/m

VIII/H.10-80 Chromphyllite! (K,Ba)(Cr,Al)2[AlSi3O10](OH,F)2 C 2c 2/m

VIII/H.10-90 Roscoelite K(V,Al,Mg)2AlSi3O10(OH)2 C 2/m 2/m

VIII/H.10-95 Ganterite! [Ba0.5(Na,K)0.5]Al2(Si2.5Al1.5O10)(OH)2 C 2/c 2/m

VIII/H.10-100 Tobelite (NH4,K)Al2(Si3Al)O10(OH)2 C 2/m 2/m

VIII/H.10-110 Nanpingite Cs(Al,Mg,Fe,Li)2(Si3Al)O10(OH,F)2 C 2/c 2/m

Other Ferroceladonite Information

References:

NAME( MinRec) PHYS. PROP.(Am.Min.,Vol.82,p503-511,1997) OPTIC PROP.(Am.Min.,Vol.82,p503-511,1997)

See Also:

Links to other databases for Ferroceladonite :
1 - Alkali-Nuts(English) 2 - Alkali-Nuts(Francais) 3 -Am. Min. Crystal Structure Database 4 -Athena 5 -Google Images 6 -Google Scholar 7 -MinDAT 8 -MinMax(Deutsch) 9 -MinMax(English) 10 -Mineralienatlas (Deutsch) 11 -QUT Mineral Atlas

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Ferroceladonite

K2Fe++Fe+++Si8O20(OH)4
Dana No: 71.2.2a.6b Strunz No: VIII/H.10-40
Locality:

Notes: