Hummerite Mineral Data

Hummerite Mineral Data
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General Hummerite Information

Help on Chemical Formula: Chemical Formula: KMgV+++++5O14•8(H2O)
Help on Composition: 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
Help on Empirical Formula: Empirical Formula: KMgV5+5O14•8(H2O)
Help on Environment: Environment: Encrustations on sandstone.
Help on IMA Status: IMA Status: Valid Species (Pre-IMA) 1951
Help on Locality: Locality: Hummer mine, Montrose County, Colorado, USA. Link to MinDat.org Location Data.
Help on Name Origin: Name Origin: Named after the locality.
Help on Name Pronunciation: Name Pronunciation: Hummerite + Pronunciation Say HUMMERITE
Help on Synonym: Synonym: ICSD 39216
  PDF 14-155
 

Hummerite Image

Click Here for Larger Hummerite Image in a New Browser Window Images:
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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
Help on Axial Ratios: Axial Ratios: a:b:c =0.8223:1:1.0324
Help on Cell Dimensions: 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
Help on Crystal System: Crystal System: Triclinic - PinacoidalH-M Symbol ( 1) Space Group: P1
Help on X Ray Diffraction: X Ray Diffraction: By Intensity(I/Io): 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),
Click Here for Large Hummerite Structure Window Crystal Structure:

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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

Help on Color: Color: Yellow, Light orange.
Help on Diaphaneity: Diaphaneity: Translucent
Help on Habit: Habit: Platy - Sheet forms (e.g. micas).
Help on Habit: Habit: Water Soluble - Water soluble mineral.
Help on Hardness: Hardness: 2 - Gypsum
Help on Luster: Luster: Pearly
Help on Streak: Streak: yellow
 

Optical Properties of Hummerite

Help on Gladstone-Dale: Gladstone-Dale: CI calc= 0.013 (Superior) - where the CI = (1-KPDcalc/KC)
KPDcalc= 0.3176,KC= 0.3219
Ncalc = 1.82
Help on Optical Data: Optical Data: Biaxial (-), b=1.81
 

Calculated Properties of Hummerite

Help on Electron Density: Electron Density: Bulk Density (Electron Density)=2.51 gm/cc
note: Specific Gravity of Hummerite =2.55 gm/cc.
Help on Fermion Index: Fermion Index: Fermion Index = 0.0047263434
Boson Index = 0.9952736566
Help on Photoelectric: Photoelectric: PEHummerite = 7.66 barns/electron
U=PEHummerite x relectron= 19.23 barns/cc.
Help on Radioactivity: 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
Help on Dana Class: 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
Help on Strunz Class: 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
Help on References: References: NAME( Dana8) PHYS. PROP.(Dana8, AmMin, v 88, p 1179) OPTIC PROP.(Dana8)
Help on See Also: 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

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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 Espaņol

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: