Donate now to keep mindat.org alive!Help mindat.org|Log In|Register|
Home PageMindat NewsThe Mindat ManualHistory of MindatCopyright StatusManagement TeamContact UsAdvertise on Mindat
Donate to MindatSponsor a PageSponsored PagesTop Available PagesMindat AdvertisersAdvertise on Mindat
The most common minerals on earthMineral PhotographyThe Elements and their Minerals
Minerals by PropertiesMinerals by ChemistryAdvanced Locality SearchRandom MineralSearch by minIDLocalities Near MeSearch ArticlesSearch GlossaryMore Search Options
Search For:
Mineral Name:
Locality Name:
Keyword(s):
 
The Mindat ManualAdd a New PhotoRate PhotosLocality Edit ReportCoordinate Completion ReportAdd Glossary Item
StatisticsThe ElementsMember ListBooks & MagazinesMineral MuseumsMineral Shows & EventsThe Mindat DirectoryDevice Settings
Photo SearchPhoto GalleriesNew Photos TodayNew Photos YesterdayMembers' Photo GalleriesPast Photo of the Day Gallery

Dickthomssenite

This page is currently not sponsored. Click here to sponsor this page.
Dick W. Thomssen
Formula:
Mg(V2O6) · 7H2O
Colour:
Light golden brown
Lustre:
Vitreous
Hardness:
Specific Gravity:
1.96 - 2.09
Crystal System:
Monoclinic
Name:
In honor of Richard ("Dick") W. Thomssen [b. April 23, 1933 USA], consulting geologist, Dayton, Nevada, USA.
This page provides mineralogical data about Dickthomssenite.


Hide all sections | Show all sections

Classification of DickthomsseniteHide

Approved
Approval Year:
2000
4.HD.25

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
D : Inovanadates

Physical Properties of DickthomsseniteHide

Vitreous
Transparency:
Translucent
Colour:
Light golden brown
Streak:
White
Hardness:
2½ on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Perfect
{100}
Fracture:
Hackly
Density:
1.96 - 2.09 g/cm3 (Measured)    2.04 g/cm3 (Calculated)

Optical Data of DickthomsseniteHide

Type:
Biaxial (-)
RI values:
nα = 1.612 nβ = 1.674 nγ = 1.710
2V:
Measured: 74° , Calculated: 73°
Max Birefringence:
δ = 0.098
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
High
Dispersion:
r < v
Pleochroism:
Non-pleochroic

Chemical Properties of DickthomsseniteHide

Formula:
Mg(V2O6) · 7H2O
IMA Formula:
MgV2O6 · 7H2O

Crystallography of DickthomsseniteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Cell Parameters:
a = 38.954 Å, b = 7.201 Å, c = 16.3465 Å
β = 97.602°
Ratio:
a:b:c = 5.41 : 1 : 2.27
Unit Cell V:
4544 ų
Z:
16
Twinning:
None mentioned

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.704 (100)
8.117 (60)
5.843 (100)
4.061 (50)
3.139 (90)
2.920 (60)
2.707 (50)

Type Occurrence of DickthomsseniteHide

Synonyms of DickthomsseniteHide

Other Language Names for DickthomsseniteHide

Simplified Chinese:水镁钒石
Traditional Chinese:水鎂釩石

Common AssociatesHide

Associated Minerals Based on Photo Data:
Lasalite2 photos of Dickthomssenite associated with Lasalite on mindat.org.

Related Minerals - Nickel-Strunz GroupingHide

4.HD.05RossiteCa(VO3)2•4H2OTric. 1 : P1
4.HD.10MetarossiteCa(V2O6) · 2H2OTric. 1 : P1
4.HD.15MuniriteNaVO3 · 1.9H2OMon.
4.HD.20MetamuniriteNaVO3Orth.
4.HD.30AnsermetiteMn2+(V2O6) · 4H2OMon. 2/m

Other InformationHide

Health Risks:
No information on health risks for this material has been entered into the database. You should always treat mineral specimens with care.

References for DickthomsseniteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Canadian Mineralogist: 39, 1691-1700.

Internet Links for DickthomsseniteHide

Localities for DickthomsseniteHide

This map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.

Locality ListHide

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for further information on this occurrence. ? - Indicates mineral may be doubtful at this locality. - Good crystals or important locality for species. - World class for species or very significant. (TL) - Type Locality for a valid mineral species. (FRL) - First Recorded Locality for everything else (eg varieties). Struck out - Mineral was erroneously reported from this locality. Faded * - Never found at this locality but inferred to have existed at some point in the past (eg from pseudomorphs.)

All localities listed without proper references should be considered as questionable.
USA
 
  • Colorado
    • Mesa Co.
      • Gateway District
        • Gateway
Kampf, A.R., Nash, B.P., Marty, J., Hughes, J.M. (2016): Mesaite, CaMn2+5(V2O7)3·12H2O, a new vanadate mineral from the Packrat mine, near Gateway, Mesa County, Colorado, USA. Mineralogical Magazine: 80: (in press)
  • Utah
    • Grand Co.
      • Thompsons District (S. E. Thomsons)
        • Yellow Cat Mesa
Kasatkin, A.V., Plášil, J., Marty, J., Belakovskiy, D.I., Lykova, I.S. (2014): Nestolaite, CaSeO3·H2O, a new mineral from the Little Eva mine, Grand County, Utah, USA. Mineralogical Magazine, 78, 497-505.
Chuck Adan specimen. Analyzed by Tony Kampf.
    • San Juan Co.
      • La Sal District (Paradox Valley District)
        • La Sal
Collected by and in the collection of Brent Thorne.
        • Lion Canyon
EDX results from Kaygeedee Minerals; Kampf A R, Hughes J M, Marty J, Nash B (2012) Postite, Mg(H2O)6Al2(OH)2(H2O)8(V10O28)·13H2O, a new mineral species from the La Sal Mining District, Utah: Crystal structure and descriptive mineralogy. The Canadian Mineralogist 50, 45-53
      • La Sal Quadrangle
Canadian Mineralogist (2001) 39, pp. 1691-1700
Mineral and/or Locality  
Mindat.org is an outreach project of the Hudson Institute of Mineralogy, a 501(c)(3) not-for-profit organization.
Copyright © mindat.org and the Hudson Institute of Mineralogy 1993-2017, except where stated. Mindat.org relies on the contributions of thousands of members and supporters.
Privacy Policy - Terms & Conditions - Contact Us Current server date and time: November 19, 2017 01:06:51 Page generated: November 4, 2017 23:48:49
Go to top of page