Hydrombobomkulite Mineral Data

Hydrombobomkulite Mineral Data +

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General Hydrombobomkulite Information

Chemical Formula:

(Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O)

Composition:

Molecular Weight = 765.17 gm

Aluminum 14.10 % Al 26.65 % Al₂O₃

Copper 2.08 % Cu 2.60 % CuO

Nickel 5.75 % Ni 7.32 % NiO

Hydrogen 5.27 % H 47.09 % H₂O

Sulfur 2.10 % S 5.23 % SO₃

Nitrogen 2.75 % N 10.59 % N₂O₅

Oxygen 67.96 % O

______ ______

100.00 % 99.48 % = TOTAL OXIDE

Empirical Formula:

Ni_0.75Cu_0.25Al₄(NO₃)_1.5(SO₄)_0.5(OH)₁₂·14(H₂O)

Environment:

Friable nodules in allophane before rapid dehydration to mbobomkulite.

IMA Status:

Approved IMA 1980

Locality:

Mbobo Mkulu cave, Nelspruit district, South Africa. Link to MinDat.org Location Data.

Name Origin:

Named as the hydrated version of mbobomkulite.

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Hydrombobomkulite Crystallography

Axial Ratios:

a:b:c =0.5913:1:1.2165

Cell Dimensions:

a = 10.145, b = 17.155, c = 20.87, Z = 8; beta = 90.55° V = 3,632.00 Den(Calc)= 2.80

Crystal System:

MonoclinicSpace Group: Unk

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

By Intensity(I/I_o): 10.45(1), 5.229(0.5), 3.485(0.3),

Physical Properties of Hydrombobomkulite

Cleavage:

[001] Perfect

Color:

Sky blue.

Habit:

Nodular - Tuberose forms having irregular protuberances over the surface.

Habit:

Powdery - Forms a loose, poorly-coherent pulverulent mass.

Streak:

light blue

Optical Properties of Hydrombobomkulite

Optical Data:

Biaxial (?)

NCalc= 1.75 - from Gladstone-Dale relationship (KC = 0.2674) where Ncalc=Dcalc*KC+1

Calculated Properties of Hydrombobomkulite

Electron Density:

r_electron=2.92 gm/cc
note: r_{Hydrombobomkulite}=2.80 gm/cc.

Fermion Index

Fermion Index = 0.02849
Boson Index = 0.97151

Photoelectric:

PE_{Hydrombobomkulite}= 3.71 barns/electron
U=PE_{Hydrombobomkulite} x r_electron= 10.83 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hydrombobomkulite is Not Radioactive

Hydrombobomkulite Classification

Dana Class:

19.1.4.2 (19)Nitrates - Hydroxyl or Halogen

(19.1)with miscellaneous formulae

(19.1.4)Dana Group

19.1.4.1 Mbobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·3(H2O) P 2₁ 2

19.1.4.2 Hydrombobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O) Unk Mono

Strunz Class:

VI/D.08-80 VI - Sulfates,Chromates,Molybdates and Tungstates

VI/D - Water-bearing sulfates with unfamiliar anions. cations of medium size

VI/D.08 - Spangolite - Glaucocerinite series

VI/D.08-05 Bechererite! (Zn,Cu)6Zn2(OH)13[(S,Si)(O,OH)4]2 P 3 3

VI/D.08-10 Spangolite Cu6Al(SO4)(OH)12Cl·3(H2O) P 3₁c 3m

VI/D.08-20 Cyanotrichite Cu4Al2(SO4)(OH)12·2(H2O) Unk Ortho

VI/D.08-30 Carbonate-cyanotrichite Cu4Al2(CO3,SO4)(OH)12·2(H2O) Unk Ortho

VI/D.08-35 Camerolaite Cu4Al2[HSbO4,SO4](OH)10(CO3)·2(H2O) P 2₁ ? 2

VI/D.08-40 Woodwardite Cu4Al2(SO4)(OH)12·2-4(H2O) Unk Hex

VI/D.08-42 Hydrowoodwardite! Cu1-xAlx(OH)2(SO4)x/2·n(H2O)with0<x<0.67andn>3x/2 R 3m 3 2/m

VI/D.08-45 Zincowoodwardite! [Zn1-xAlx(OH)2][(SO4)x/2(H2O)n] P 3- or R 3m 3

VI/D.08-45* Zincowoodwardite-1T! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],x=0.33,n.0.96 P 3 3

VI/D.08-45** Zincowoodwardite-3R! [Zn1BxAlx(OH)2][(SO4)x/2·n(H2O)],0.32<x<0.50,n=0.59 R 3m 3 2/m

VI/D.08-50 Chalcoalumite CuAl4(SO4)(OH)12·3(H2O) P 2₁ 2

VI/D.08-60 Nickelalumite (Ni,Cu)Al4[(SO4),(NO3)2](OH)12·3(H2O) P 2₁ 2

VI/D.08-70 Mbobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·3(H2O) P 2₁ 2

VI/D.08-80 Hydrombobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O) Unk Mono

VI/D.08-90 Carrboydite (Ni,Cu)14Al9(SO4,CO3)6(OH)43·7(H2O) Unk Hex

VI/D.08-100 Zincaluminite Zn6Al6(SO4)2(OH)26·5(H2O) Unk Hex

VI/D.08-110 Glaucocerinite (Zn,Cu)5Al3(SO4)1.5(OH)16·9(H2O) Unk (HEX-R) Trig

Other Hydrombobomkulite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8)

See Also:

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

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Hydrombobomkulite

(Ni,Cu)Al4(NO3,SO4)2(OH)12·14(H2O)
Dana No: 19.1.4.2 Strunz No: VI/D.08-80
Locality:

Notes: