Reevesite Mineral Data

General Reevesite Information

Chemical Formula:

Ni6Fe+++2(CO3)(OH)16•4(H2O)

Composition:

Molecular Weight = 868.02 gm

Iron 12.87 % Fe 18.40 % Fe₂O₃

Nickel 40.57 % Ni 51.63 % NiO

Hydrogen 2.79 % H 24.91 % H₂O

Carbon 1.38 % C 5.07 % CO₂

Oxygen 42.39 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

Ni₆Fe³⁺₂(CO₃)(OH)₁₆•4(H₂O)

Environment:

Alteration product of a highly weathered iron-nickel meteorite.

IMA Status:

Approved IMA 1967

Locality:

Wolf Creek meteorite. Found three km west of the Scotia talc mine, Bon Accord area, Barberton, Transvaal, South Africa Link to MinDat.org Location Data.

Name Origin:

Named for Frank Reeves (1886-?), American geologist who discovered the Wolf Creek meteorite crater.

Name Pronunciation:

Reevesite + Pronunciation

Reevesite Image

Images:

Reevesite

Comments: Green reevesite coatings on serpentinite rock.
Location: Pacific Asbestos Corporation Mine, near Copperopolis, Tuolumne County, California, USA. Scale: See Photo.
© Jeff Weissman / Photographic Guide to Mineral Species

Reevesite Crystallography

Axial Ratios:

a:c = 1:6.88539

Cell Dimensions:

a = 6.614, c = 45.54, Z = 3; V = 1,725.25 Den(Calc)= 2.51

Crystal System:

Trigonal - Hexagonal Scalenohedral H-M Symbol (3 2/m) Space Group: R 3m

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

By Intensity(I/I_o): 7.63(1), 2.6(0.81), 3.8(0.73),

Physical Properties of Reevesite

Color:

Green yellow, Light yellow.

Density:

2.8 - 2.88, Average = 2.84

Diaphaneity:

Transparent

Hardness:

2 - Gypsum

Luster:

Pearly

Optical Properties of Reevesite

Gladstone-Dale:

CI meas= 0.001 (Superior) - where the CI = (1-KPDmeas/KC)
CI calc= -0.13 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.2759,KPDmeas= 0.2438,KC= 0.2442
Ncalc = 1.61 - 1.7

Optical Data:

Uniaxial (-), e=1.65, w=1.735, bire=0.0850.

Calculated Properties of Reevesite

Electron Density:

Bulk Density (Electron Density)=2.84 gm/cc
note: Specific Gravity of Reevesite =2.84 gm/cc.

Fermion Index:

Fermion Index = 0.0076720171
Boson Index = 0.9923279829

Photoelectric:

PE_Reevesite= 19.60 barns/electron
U=PE_Reevesite x rElectron Density= 55.65 barns/cc.

Radioactivity:

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

Reevesite Classification

Dana Class:

16b.06.03.01 (16b)Carbonates - Hydroxyl or Halogen

(16b.06)Dana Type

(16b.06.03)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral)

16b.06.03.01 Reevesite Ni6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m

16b.06.03.02 Takovite Ni6Al2(OH)16(CO3,OH)•4(H2O) R 3m 3 2/m

16b.06.03.03 Comblainite Ni6Co2(CO3)(OH)16•4(H2O) R 3m 3 2/m

Strunz Class:

05.DA.50 05 - CARBONATES (NITRATES)

05.D - Carbonates with Additional Anions, with H2O

05.DA -With medium-sized cations

05.DA.50 Desautelsite Mg6Mn2(CO3)(OH)16•4(H2O) R 3m or R 3m Trig

05.DA.50 Comblainite Ni6Co2(CO3)(OH)16•4(H2O) R 3m 3 2/m

05.DA.50 Hydrotalcite Mg6Al2(CO3)(OH)16•4(H2O) R 3m 3 2/m

05.DA.50 Pyroaurite Mg6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m

05.DA.50 Reevesite Ni6Fe2(CO3)(OH)16•4(H2O) R 3m 3 2/m

05.DA.50 Stichtite Mg6Cr2(CO3)(OH)16•4(H2O) R 3m 3 2/m

05.DA.50 Takovite Ni6Al2(OH)16(CO3,OH)•4(H2O) R 3m 3 2/m

Other Reevesite Information

References:

NAME( AntBidBlaNic3) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Enc. of Minerals,2nd ed.,1990)

See Also:

Links to other databases for Reevesite :
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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Print or Cut-and-Paste your Reevesite Specimen Label here :

Reevesite

Ni6Fe+++2(CO3)(OH)16•4(H2O)
Dana No: 16b.06.03.01 Strunz No: 05.DA.50
Locality:

Notes:

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