Hydrombobomkulite Mineral Data

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.

Name Pronunciation:

Hydrombobomkulite + Pronunciation

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:

Monoclinic Space 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 = 0.2675) where Ncalc=Dcalc*KC+1

Calculated Properties of Hydrombobomkulite

Electron Density:

Bulk Density (Electron Density)=2.92 gm/cc
note: Specific Gravity of Hydrombobomkulite =2.80 gm/cc.

Fermion Index:

Fermion Index = 0.02
Boson Index = 0.98

Photoelectric:

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

Radioactivity:

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

Hydrombobomkulite Classification

Dana Class:

19.01.04.02 (19)Nitrates - Hydroxyl or Halogen

(19.01)with miscellaneous formulae

(19.01.04)Mbobomkulite Group

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

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

Strunz Class:

05.ND.15 05 - CARBONATES (NITRATES)

05.N - NITRATES

05.ND -With OH (etc.) and H2O

05.ND.15 Hydrombobomkulite (Ni,Cu)Al4(NO3,SO4)2(OH)12•14(H2O) Unk Mono

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 - 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 Hydrombobomkulite here :
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Print or Cut-and-Paste your Hydrombobomkulite Specimen Label here :

Hydrombobomkulite

(Ni,Cu)Al4(NO3,SO4)2(OH)12•14(H2O)
Dana No: 19.01.04.02 Strunz No: 05.ND.15
Locality:

Notes: