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.

Name Pronunciation:

Redingtonite + Pronunciation

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

Diaphaneity:

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:

Bulk Density (Electron Density)=1.83 gm/cc
note: Specific Gravity of Redingtonite =1.76 gm/cc.

Fermion Index:

Fermion Index = 0.01
Boson Index = 0.99

Photoelectric:

PE_Redingtonite= 4.07 barns/electron
U=PE_Redingtonite x rElectron Density= 7.44 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)
Redingtonite is Not Radioactive

Redingtonite Classification

Dana Class:

29.07.03.06 (29)Hydrated Acid and Sulfates

(29.07)where A (B)2 (XO4)4 · x(H2O)

(29.07.03)Halotrichite Group (Monoclinic with 22 H2O)

29.07.03.01 Pickeringite MgAl2(SO4)4•22(H2O) P 2 2

29.07.03.02 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2

29.07.03.03 Apjohnite MnAl2(SO4)4•22(H2O) P 2₁/c 2/m

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

29.07.03.05 Bilinite FeFe2(SO4)4•22(H2O) P 2₁/c 2/m

29.07.03.06 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono

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

Strunz Class:

07.CB.85 07 - SULFATES (SELENATES, TELLURATES)

07.C - Sulfates (selenates, etc.) without Additional Anions, with H2O

07.CB -With only medium-sized cations

07.CB.85 Bilinite FeFe2(SO4)4•22(H2O) P 2₁/c 2/m

07.CB.85 Apjohnite MnAl2(SO4)4•22(H2O) P 2₁/c 2/m

07.CB.85 Dietrichite (Zn,Fe,Mn)Al2(SO4)4•22(H2O) P 2₁/c 2/m

07.CB.85 Halotrichite FeAl2(SO4)4•22(H2O) P 2 2

07.CB.85 Pickeringite MgAl2(SO4)4•22(H2O) P 2 2

07.CB.85 Redingtonite (Fe,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O) Mono

07.CB.85 Wupatkiite (Co,Mg,Ni)Al2(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 - EUROmin Project
4 - Ecole des Mines de Paris
5 - GeoScienceWorld
6 - Google Images
7 - Google Scholar
8 - Handbook of Mineralogy (MinSocAm)
9 - Handbook of Mineralogy (UofA)
10 - MinDAT
11 - Mineralienatlas (Deutsch)
12 - Online Mineral Museum
13 - QUT Mineral Atlas
14 - Ruff.Info

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Ask about Redingtonite here :
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Print or Cut-and-Paste your Redingtonite Specimen Label here :

Redingtonite

(Fe++,Mg,Ni)(Cr,Al)2(SO4)4•22(H2O)
Dana No: 29.07.03.06 Strunz No: 07.CB.85
Locality:

Notes: