Hummerite Mineral Data

General Hummerite Information

Chemical Formula:

KMgV+++++5O14•8(H2O)

Composition:

Molecular Weight = 686.22 gm

Potassium 5.70 % K 6.86 % K₂O

Magnesium 3.54 % Mg 5.87 % MgO

Vanadium 37.12 % V 66.26 % V₂O₅

Hydrogen 2.35 % H 21.00 % H₂O

Oxygen 51.29 % O

______ ______

100.00 % 100.00 % = TOTAL OXIDE

Empirical Formula:

KMgV⁵⁺₅O₁₄•8(H₂O)

Environment:

Encrustations on sandstone.

IMA Status:

Valid Species (Pre-IMA) 1951

Locality:

Hummer mine, Montrose County, Colorado, USA. Link to MinDat.org Location Data.

Name Origin:

Named after the locality.

Name Pronunciation:

Hummerite + Pronunciation

Synonym:

ICSD 39216

PDF 14-155

Hummerite Image

Images:

Hummerite

Comments: Orange-yellow hummerite on fossil wood.
Location: Ronneburg U deposit, Gera district, Thuringia, Germany. Scale: Specimen size 65 mm.
© Thomas Witzke / Abraxas-Verlag

Hummerite Crystallography

Axial Ratios:

a:b:c =0.8223:1:1.0324

Cell Dimensions:

a = 8.8178, b = 10.723, c = 11.0707, Z = 2; alpha = 65.798°, beta = 74.057°, gamma = 71.853° V = 872.38 Den(Calc)= 2.61

Crystal System:

Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1

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

By Intensity(I/I_o): 8.2(1), 7.4(0.7), 2.73(0.6),7(0.5), 2.11(0.4), 3.13(0.4), 3.31(0.4), 9.3(0.3),

Crystal Structure:

Mouse
drag1 - LMB Manipulate Structure
drag2 - RMB Resize/Rotate
Keyboard
S - Stereo Pair on/off
H - Help Screen
I - Data Info
A - Atoms On/Off
P - Polyhedra On/Off
B - Bonds On/Off
Help on Above

Hughes J M , Schindler M , Rakovan J F , Cureton F E , The Canadian Mineralogist , 40 (2002) p.1429-1435, The crystal structure of hummerite, K Mg(V5O14).8H2O:, Bonding between the [V10O28] structural units and the, {K2Mg2(H2O)16} interstitial complex

Physical Properties of Hummerite

Color:

Yellow, Light orange.

Diaphaneity:

Translucent

Habit:

Platy - Sheet forms (e.g. micas).

Habit:

Water Soluble - Water soluble mineral.

Hardness:

2 - Gypsum

Luster:

Pearly

Streak:

yellow

Optical Properties of Hummerite

Gladstone-Dale:

CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3176,KC= 0.3219
Ncalc = 1.82

Optical Data:

Biaxial (-), b=1.81

Calculated Properties of Hummerite

Electron Density:

Bulk Density (Electron Density)=2.51 gm/cc
note: Specific Gravity of Hummerite =2.55 gm/cc.

Fermion Index:

Fermion Index = 0.0047263434
Boson Index = 0.9952736566

Photoelectric:

PE_Hummerite= 7.66 barns/electron
U=PE_Hummerite x r_electron= 19.23 barns/cc.

Radioactivity:

GRapi = 80.97 (Gamma Ray American Petroleum Institute Units)
Concentration of Hummerite per GRapi unit = 1.24 (%)

Estimated Radioactivity from Hummerite - barely detectable

Hummerite Classification

Dana Class:

47.02.02.01 (47)Vanadium Oxysalts

(47.02)(VmOn)

(47.02.02)Dana Group

47.02.02.01 Hummerite KMgV5O14•8(H2O) P1 1

Strunz Class:

04.HC.10 04 - OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodate

04.H - V[5,6] Vanadates

04.HC -[6]-Sorovanadates

04.HC.10 Hummerite KMgV5O14•8(H2O) P1 1

Other Hummerite Information

References:

NAME( Dana8) PHYS. PROP.(Dana8, AmMin, v 88, p 1179) OPTIC PROP.(Dana8)

See Also:

Links to other databases for Hummerite :
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

Search for Hummerite using:

[AOL] [Bing] [Dog Pile] [GeoScienceWorld] [HotBot] [Ixquick] [Lycos] [MAMMA] [Scirus] [Teoma] [WebCrawler] [Wikipedia] [YAHOO]

Visit our Advertisers for Hummerite :

A Bijoux Google Search for Hummerite
Adam's Minerals Google Search for Hummerite
Cape Minerals Google Search for Hummerite
Dakota Matrix Minerals Google Search for Hummerite
Excalibur Mineral Corp. Google Search for Hummerite
Exceptional Minerals Google Search for Hummerite
John Betts Fine Minerals Search for Hummerite
McDougall Minerals Google Search for Hummerite
Mineral News Website Link
Rock and Mineral Shows Google Search for Hummerite
Weinrich Minerals, Inc. Google Search for Hummerite

Ask about Hummerite here :
Ask-A-Mineralogist from the Mineralogical Society of America
Mindat.org's Discussion Groups
Original Rockhounds Discussion Group
Rockhounds Discussion Group on Yahoo Groups
Mineral Discussion Forum from Fabre Minerals - also available in Español

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

Hummerite

KMgV+++++5O14•8(H2O)
Dana No: 47.02.02.01 Strunz No: 04.HC.10
Locality:

Notes: