Mendozavilite-KCa (original) (raw)

A valid IMA mineral species

About Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

Formula:

[K2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O34(OH)3]

Lustre:

Sub-Adamantine, Vitreous

Crystal System:

Monoclinic

Name:

Named for the relationship to other mendozavilite group minerals and the dominant cations K and Ca.

First recognized as a potential hypothetical member of the Betpakdalite group (IMA 10-E). Later in 2011, approved by IMA as a valid species.

Unique IdentifiersHide

This section is currently hidden. Click the show button to view.

Long-form identifier:

mindat:1:1:41947:1

a68f0bd7-e1d5-4d7f-b9ff-316d813c4aa5

IMA Classification of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

IMA Formula:

[K2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O34(OH)3]

Type description reference:

Kampf, A. R., Mills, S. J., Rumsey, M. S., Dini, M., Birch, W. D., Spratt, J., Pluth, J. J., Steele, I. M., Jenkins, R. A., Pinch, W. W. (2012) The heteropolymolybdate family: structural relations, nomenclature scheme and new species. Mineralogical Magazine, 76 (5) 1175-1207 doi:10.1180/minmag.2012.076.5.09

Classification of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

7.GB.50

7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
G : Molybdates, Wolframates and Niobates
B : With additional anions and/or H2O

Mineral SymbolsHide

This section is currently hidden. Click the show button to view.

As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.

Physical Properties of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

Streak:

Very pale yellowish green

Fracture:

Irregular/Uneven

Optical Data of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

RI values:

_n_α = 1.780(5) _n_β = 1.795(5) _n_γ = 1.817

δ = 0.037

Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.

Pleochroism:

Non-pleochroic

Chemistry of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

Mindat Formula:

[K2(H2O)15Ca(H2O)6][Mo8P2Fe3+3O34(OH)3]

Crystallography of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

Crystal System:

Monoclinic

Class (H-M):

2/m - Prismatic

Cell Parameters:

a = 18.909(5) Å, b = 10.897(2) Å, c = 14.958(4) Å
β = 129.780(9)°

Ratio:

a:b:c = 1.735 : 1 : 1.373

Morphology:

Pseudeohexagonal, tabular crystals up to 0.5 mm across and 0.05 mm thick. Forms observed: {001},{110},{111},{20-1} and {110}

Twinning:

Ubiquitous: Contact on {001} and penetration, both on roatation of 120° about [102].

X-Ray Powder DiffractionHide

This section is currently hidden. Click the show button to view.

Powder Diffraction Data:

Geological EnvironmentHide

This section is currently hidden. Click the show button to view.

Type Occurrence of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

General Appearance of Type Material:

Greenish yellow pseudohexagonal crystals on massive vein quartz

Place of Conservation of Type Material:

Natural History Museum of Los Angeles County, Los Angeles, California, USA, catalogue numbers 63315 and 63572.

Associated Minerals at Type Locality:

Reference:

Kampf, A.R., Mills, S.J., Rumsey, M. S., Dini, M., Birch, W. D., Spratt, J., Pluth, J.J., Steele, I. M., Jenkins, R. A., and Pinch, W. W. (2012): The heteromolybdate family: structural relations, nomenclature scheme and new species. Mineralogical Magazine: 76(5): 1175-1207.

Synonyms of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

Relationship of Mendozavilite-KCa to other SpeciesHide

This section is currently hidden. Click the show button to view.

Other Members of this group:

Common AssociatesHide

This section is currently hidden. Click the show button to view.

Associated Minerals Based on Photo Data:

Related Minerals - Strunz-mindat GroupingHide

This section is currently hidden. Click the show button to view.

Fluorescence of Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

Other InformationHide

This section is currently hidden. Click the show button to view.

Health Risks:

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

Internet Links for Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

References for Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

Reference List:

Kampf, A. R., Mills, S. J., Rumsey, M. S., Dini, M., Birch, W. D., Spratt, J., Pluth, J. J., Steele, I. M., Jenkins, R. A., Pinch, W. W. (2012) The heteropolymolybdate family: structural relations, nomenclature scheme and new species. Mineralogical Magazine, 76 (5) 1175-1207 doi:10.1180/minmag.2012.076.5.09

Localities for Mendozavilite-KCaHide

This section is currently hidden. Click the show button to view.

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 section is currently hidden. Click the show button to view.

- This locality has map coordinates listed. - This locality has estimated coordinates. ⓘ - Click for references and 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 (e.g. from pseudomorphs).

All localities listed without proper references should be considered as questionable.