Hendersonite Mineral Data

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.

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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

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:

r_electron=2.78 gm/cc
note: r_Hendersonite=2.85 gm/cc.

Fermion Index

Fermion Index = 0.00139
Boson Index = 0.99861

Photoelectric:

PE_Hendersonite= 8.94 barns/electron
U=PE_Hendersonite x r_electron= 24.85 barns/cc.

Radioactivity:

GRapi = 0 (Gamma Ray American Petroleum Institute Units)

Hendersonite is Not Radioactive

Hendersonite Classification

Dana Class:

47.3.1.4 (47)Vanadium Oxysalts

(47.3)(Hydrated)

(47.3.1)Dana Group

47.3.1.1 Hewettite CaV6O16·9(H2O) P 2/m 2/m

47.3.1.2 Metahewettite CaV6O16·3(H2O) A2/m 2/m

47.3.1.3 Barnesite Na2V6O16·3(H2O) P 2/m 2/m

47.3.1.4 Hendersonite Ca1.3V6O16·6(H2O) Pnam 2/m 2/m 2/m

47.3.1.5 Grantsite Na4CaxV2xV12-2xO32·8(H2O) C 2/m 2/m

Strunz Class:

IV/G.12-30 IV - Oxides

IV/G - Vanadiumoxides (with V4+/5+) Layered vanadates. Typical Vanadiumbronzes

IV/G.12 - Barnessite - Metahewettite series

IV/G.12-10 Barnesite Na2V6O16·3(H2O) P 2/m 2/m

IV/G.12-20 Grantsite Na4CaxV2xV12-2xO32·8(H2O) C 2/m 2/m

IV/G.12-30 Hendersonite Ca1.3V6O16·6(H2O) Pnam 2/m 2/m 2/m

IV/G.12-40 Hewettite CaV6O16·9(H2O) P 2/m 2/m

IV/G.12-50 Metahewettite CaV6O16·3(H2O) A2/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 -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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Print or Cut-and-Paste your Hendersonite Specimen Label here :

Hendersonite

Ca1.3V6O16·6(H2O)
Dana No: 47.3.1.4 Strunz No: IV/G.12-30
Locality:

Notes: