Redingtonite Mineral Data

Redingtonite Mineral Data +

General Redingtonite Information

Chemical Formula:

(Fe++,Mg,Ni)(Cr,Al)2(SO4)4·22(H2O)

Composition:

Molecular Weight = 918.74 gm

Magnesium 0.79 % Mg 1.32 % MgO

Aluminum 1.47 % Al 2.77 % Al₂O₃

Chromium 8.49 % Cr 12.41 % Cr₂O₃

Iron 3.65 % Fe 4.69 % FeO

Nickel 0.64 % Ni 0.81 % NiO

Hydrogen 4.83 % H 43.14 % H₂O

Sulfur 13.96 % S 34.86 % SO₃

Oxygen 66.17 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Fe²⁺_0.6Mg_0.3Ni_0.1Cr_1.5Al_0.5(SO₄)₄·22(H₂O)

IMA Status:

Valid Species (Pre-IMA) 1888

Locality:

Redington mine, Knoxville, Napa Co., California. Link to MinDat.org Location Data.

Name Origin:

Named after it's locality.

Redingtonite Image

Images:

Click Here for Larger Redingtonite Image

Redingtonite Botryogen

Comments: Pale pink granular redingtonite on yellow-brown botryogen.
Location: Redington Mine, Knoxville, Napa County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Redingtonite Crystallography

Crystal System:

Monoclinic

Physical Properties of Redingtonite

Color:

White, Light violet, Light purple.

Density:

1.761

Diaphaniety:

Transparent

Habit:

Fibrous - Crystals made up of fibers.

Hardness:

2 - Gypsum

Luminescence:

Non-fluorescent.

Luster:

Silky

Magnetism:

Nonmagnetic

Streak:

white

Optical Properties of Redingtonite

Optical Data:

NCalc= 1.46 - from Gladstone-Dale relationship (KC = 0.263) where Ncalc=Dmeas*KC+1

Calculated Properties of Redingtonite

Electron Density:

r_electron=1.83 gm/cc
note: r_Redingtonite=1.76 gm/cc.

Fermion Index

Fermion Index = 0.01107
Boson Index = 0.98893

Photoelectric:

PE_Redingtonite= 4.07 barns/electron
U=PE_Redingtonite x r_electron= 7.44 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Redingtonite is Not Radioactive

Redingtonite Classification

Dana Class:

29.7.3.6 (29)Hydrated Acid and Sulfates

(29.7)where A (B)2 (XO4)4 · x(H2O)

(29.7.3)Halotrichite Group (Monoclinic with 22 H2O)

29.7.3.1 Pickeringite MgAl2(SO4)4·22(H2O) P 2 2

29.7.3.2 Halotrichite FeAl2(SO4)4·22(H2O) P 2 2

29.7.3.3 Apjohnite MnAl2(SO4)4·22(H2O) P 2₁/c 2/m

29.7.3.4 Dietrichite (Zn,Fe,Mn)Al2(SO4)4·22(H2O) P 2₁/c 2/m

29.7.3.5 Bilinite FeFe2(SO4)4·22(H2O) P 2₁/c 2/m

29.7.3.6 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4·22(H2O) Mono

29.7.3.7 Wupatkiite (Co,Mg,Ni)Al2(SO4)4·22(H2O) P 2₁/c 2/m

Strunz Class:

VI/C.12-50 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/C - Water-bearing sulfates without unfamiliar anions. cations of medium and very big size

VI/C.12 - Halotrichite group, Pickeringite - Bilinite

VI/C.12-10 Pickeringite MgAl2(SO4)4·22(H2O) P 2 2

VI/C.12-12 Wupatkiite (Co,Mg,Ni)Al2(SO4)4·22(H2O) P 2₁/c 2/m

VI/C.12-20 Halotrichite FeAl2(SO4)4·22(H2O) P 2 2

VI/C.12-30 Apjohnite MnAl2(SO4)4·22(H2O) P 2₁/c 2/m

VI/C.12-40 Dietrichite (Zn,Fe,Mn)Al2(SO4)4·22(H2O) P 2₁/c 2/m

VI/C.12-50 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4·22(H2O) Mono

VI/C.12-60 Bilinite FeFe2(SO4)4·22(H2O) P 2₁/c 2/m

Other Redingtonite Information

References:

NAME( MinRec) PHYS. PROP.(Dana)

See Also:

Links to other databases for Redingtonite :
1 -Am. Min. Crystal Structure Database 2 -Athena 3 - Crocoite.com Mineral Locations 4 - EUROmin Project 5 -Google Images 6 -Google Scholar 7 -Handbook of Mineralogy (UofA) 8 -MinDAT 9 -MinMax(Deutsch) 10 -MinMax(English) 11 -Mineralienatlas (Deutsch) 12 -QUT Mineral Atlas 13 -École des Mines de Paris

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Redingtonite

(Fe++,Mg,Ni)(Cr,Al)2(SO4)4·22(H2O)
Dana No: 29.7.3.6 Strunz No: VI/C.12-50
Locality:

Notes: