Reevesite Mineral Data

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)

IMA Status:

Approved IMA 1967

Locality:

Link to MinDat.org Location Data.

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 ScalenohedralH-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

Diaphaniety:

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

Optical Data:

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

Calculated Properties of Reevesite

Electron Density:

r_electron=2.84 gm/cc
note: r_Reevesite=2.84 gm/cc.

Fermion Index

Fermion Index = 0.00767
Boson Index = 0.99233

Photoelectric:

PE_Reevesite= 19.60 barns/electron
U=PE_Reevesite x r_electron= 55.65 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Reevesite is Not Radioactive

Reevesite Classification

Dana Class:

16b.6.3.1 (16b)Carbonates - Hydroxyl or Halogen

(16b.6)Dana Type

(16b.6.3)Sjorgrenite-Hydrotalcite Group (Hydrotalcite Subgroup:Rhombohedral)

16b.6.3.1 Reevesite Ni6Fe2(CO3)(OH)16·4(H2O) R 3m 3 2/m

16b.6.3.2 Takovite Ni6Al2(OH)16(CO3,OH)·4(H2O) R 3m 3 2/m

16b.6.3.3 Comblainite Ni6Co2(CO3)(OH)16·4(H2O) R 3m 3 2/m

Strunz Class:

V/E.03-60 V - Nitrates, Carbonates and Borates

V/E - Water-bearing carbonates with unfamiliar anions

V/E.03 - Hydrotalcite group

V/E.03-10 Hydrotalcite Mg6Al2(CO3)(OH)16·4(H2O) R 3m 3 2/m

V/E.03-20 Stichtite Mg6Cr2(CO3)(OH)16·4(H2O) R 3m 3 2/m

V/E.03-30 Pyroaurite Mg6Fe2(CO3)(OH)16·4(H2O) R 3m 3 2/m

V/E.03-40 Desautelsite Mg6Mn2(CO3)(OH)16·4(H2O) R 3m or R 3m Trig

V/E.03-50 Takovite Ni6Al2(OH)16(CO3,OH)·4(H2O) R 3m 3 2/m

V/E.03-60 Reevesite Ni6Fe2(CO3)(OH)16·4(H2O) R 3m 3 2/m

V/E.03-70 Comblainite Ni6Co2(CO3)(OH)16·4(H2O) R 3m 3 2/m

V/E.03-80 Sergeevite Ca2Mg11(CO3)9(HCO3)4(OH)4·6(H2O) R 32 3 2

Other Reevesite Information

References:

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

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Reevesite

Ni6Fe+++2(CO3)(OH)16·4(H2O)
Dana No: 16b.6.3.1 Strunz No: V/E.03-60
Locality:

Notes: