Hendersonite Mineral Data

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General Hendersonite Information

Chemical Formula:

Ca1.3V6O16•6(H2O)

Composition:

Molecular Weight = 721.83 gm

Calcium 7.22 % Ca 10.10 % CaO

Vanadium 42.34 % V 75.59 % V₂O₅

Hydrogen 1.68 % H 14.97 % H₂O

Oxygen 48.76 % O

______ ______

100.00 % 100.66 % = TOTAL OXIDE

Empirical Formula:

Ca_1.3V⁵⁺₆O₁₆•6(H₂O)

Environment:

Sandstone-hosted uranium-vanadium deposits.

IMA Status:

Approved IMA 1962

Locality:

Eastside mines in San Juan County, New Mexico. Link to MinDat.org Location Data.

Name Origin:

Named after Edward P. Henderson of the U.S. National Museum, in recognition of his mineralogical studies of the vanadium-uranium deposits of the Colorado Plateau.

Name Pronunciation:

Hendersonite + Pronunciation

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Hendersonite Crystallography

Axial Ratios:

a:b:c =3.454:1:5.2701

Cell Dimensions:

a = 12.4, b = 3.59, c = 18.92, Z = 2; V = 842.24 Den(Calc)= 2.85

Crystal System:

Orthorhombic - DipyramidalH-M Symbol (2/m 2/m 2/m) Space Group: Pnam

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

By Intensity(I/I_o): 9.45(1), 3.113(0.36), 4.7(0.16),

Physical Properties of Hendersonite

Color:

Greenish black, Black.

Density:

2.77 - 2.79, Average = 2.78

Habit:

Bladed - Aggregates of thin lath-like crystals (e.g. kyanite).

Habit:

Fibrous - Crystals made up of fibers.

Habit:

Microscopic Crystals - Crystals visible only with microscopes.

Hardness:

2.5 - Finger Nail

Luster:

Adamantine - Pearly

Streak:

brownish green

Optical Properties of Hendersonite

Gladstone-Dale:

CI meas= -0.166 (Poor) - where the CI = (1-KPDmeas/KC)
CI calc= -0.137 (Poor) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3743,KPDmeas= 0.3837,KC= 0.3291
Ncalc = 1.91 - 1.94

Optical Data:

Biaxial (-), a=2, b=2.1, g=2.1, bire=0.1000, 2V(Calc)=0, 2V(Meas)=medium.

Pleochroism (x):

green.

Pleochroism (y):

brownish green.

Pleochroism (z):

brown.

Calculated Properties of Hendersonite

Electron Density:

Bulk Density (Electron Density)=2.78 gm/cc
note: Specific Gravity of Hendersonite =2.85 gm/cc.

Fermion Index:

Fermion Index = 0.0013926048
Boson Index = 0.9986073952

Photoelectric:

PE_Hendersonite= 8.94 barns/electron
U=PE_Hendersonite x rElectron Density= 24.85 barns/cc.

Radioactivity:

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

Hendersonite Classification

Dana Class:

47.03.01.04 (47)Vanadium Oxysalts

(47.03)(Hydrated)

(47.03.01)Hewettite Group

47.03.01.01 Hewettite CaV6O16•9(H2O) P 2/m 2/m

47.03.01.02 Metahewettite CaV6O16•3(H2O) A2/m 2/m

47.03.01.03 Barnesite Na2V6O16•3(H2O) P 2/m 2/m

47.03.01.04 Hendersonite Ca1.3V6O16•6(H2O) Pnam 2/m 2/m 2/m

47.03.01.05 Grantsite Na4CaxV2xV12-2xO32•8(H2O) C 2/m 2/m

Strunz Class:

04.HG.50 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.H - V[5,6] Vanadates

04.HG -Unclassified V oxides

04.HG.50 Hendersonite Ca1.3V6O16•6(H2O) Pnam 2/m 2/m 2/m

Other Hendersonite Information

References:

NAME( MinRec) PHYS. PROP.(Enc. of Minerals,2nd ed.,1990) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Hendersonite :
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 Hendersonite here :
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Rockhounds Discussion Group on Yahoo Groups
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Print or Cut-and-Paste your Hendersonite Specimen Label here :

Hendersonite

Ca1.3V6O16•6(H2O)
Dana No: 47.03.01.04 Strunz No: 04.HG.50
Locality:

Notes: