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Magnesiopascoite

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Formula:
Ca2Mg(V10O28) · 16H2O
Crystal System:
Monoclinic
Member of:
Name:
relation to pascoite, the Magnesium analogue of pascoite
Pascoite group


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Classification of MagnesiopascoiteHide

Approved
Approval Year:
2007
4.HC.05

4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
47.3.6.3

47 : VANADIUM OXYSALTS
3 : Hydrated Normal Vanadium Oxysalts

Optical Data of MagnesiopascoiteHide

Type:
Biaxial (-)
RI values:
nα = 1.769(3) nβ = 1.802(3) nγ = 1.807(3)
2V:
Measured: 45° (5)
Max Birefringence:
δ = 0.038
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
r < v, crossed
Comments:
Y (orange) > X (yellow, Z (yellow)

Chemical Properties of MagnesiopascoiteHide

Formula:
Ca2Mg(V10O28) · 16H2O
IMA Formula:
Ca2MgV5+10O28 · 16H2O

Crystallography of MagnesiopascoiteHide

Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Cell Parameters:
a = 19.8442 Å, b = 9.9353 Å, c = 10.7149 Å
β = 120.305°
Ratio:
a:b:c = 1.997 : 1 : 1.078
Unit Cell V:
1823.9 ų
Z:
2
Morphology:
crystals vary in aspect from tabular to equant to prismatic. {001} prominent. Other forms include {302}, {401}, {112}, {113}, {11-1}, {11-2}, {22-3}, and {33-1)
Twinning:
none observed

X-Ray Powder DiffractionHide

Powder Diffraction Data:
d-spacingIntensity
9.242 (20)
8.872 (30)
8.571 (100)
7.270 (40)
5.477 (15)
4.590 (15)
4.355 (15)
2.137 (20)

Type Occurrence of MagnesiopascoiteHide

General Appearance of Type Material:
parallel stacks of lustrous crystals that vary from tabular to equant to prismatic
Place of Conservation of Type Material:
Natural History Museum of Los Angeles County, California, USA, (catalog numbers 58610 and 58611; the same type specimens as martyite)
Associated Minerals at Type Locality:

Synonyms of MagnesiopascoiteHide

Other Language Names for MagnesiopascoiteHide

Simplified Chinese:镁橙钒钙石

Relationship of Magnesiopascoite to other SpeciesHide

Member of:
Other Members of this group:
HuemuliteNa4Mg(V10O28) · 24H2OTric.
HummeriteK2Mg2(V10O28) · 16H2OTric.
LasaliteNa2Mg2(V10O28) · 20H2OMon. 2/m : B2/b
PascoiteCa3(V10O28) · 17H2OMon. 2 : B2
RakovaniteNa3(H3V10O28) · 15H2OMon. 2/m

Related Minerals - Nickel-Strunz GroupingHide

4.HC.05PascoiteCa3(V10O28) · 17H2OMon. 2 : B2
4.HC.05LasaliteNa2Mg2(V10O28) · 20H2OMon. 2/m : B2/b
4.HC.10HummeriteK2Mg2(V10O28) · 16H2OTric.
4.HC.15SherwooditeCa4.5(AlV4+2V5+12O40) · 28H2OTet. 4/mmm (4/m 2/m 2/m) : I41/amd

Related Minerals - Dana Grouping (8th Ed.)Hide

47.3.6.1MelanovanaditeCa(V5+,V4+)4O10 · 5H2OTric. 1 : P1

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 MagnesiopascoiteHide

Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
Kampf, A.R. & I.M. Steele: Magnesiopascoite, a new member of the pascoite group: description and crystal structure. Canadian Mineralogist 46,679-686(2008)

Internet Links for MagnesiopascoiteHide

Localities for MagnesiopascoiteHide

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)
    • Montrose Co.
      • Bull Canyon District
Kampf, A.R., Hughes, J.M., Marty, J., Nash, B.P., Chen, Yu-S., Steele, I.M. (2014) Bluestreakite, K4Mg2(V4+2V5+8O28)·14H2O, a new mixed-valence decavanadate mineral from the Bluestreak Mine, Montrose County, Colorado: crystal structure and descriptive mineralogy. Canadian Mineralogist. 52:1007-1018; Kampf, A. R., Marty, J., Nash, B. P., Plášil, J., Kasatkin, A. V., & Škoda, R. (2012). Calciodelrioite, Ca (VO3) 2 (H2O) 4, the Ca analogue of delrioite, Sr (VO3) 2 (H2O) 4. Mineralogical Magazine, 76(7), 2803-2817.
      • Gypsum Valley
Nikischer, Tony, Mineral News, February, 2015
  • Utah
    • San Juan Co.
      • La Sal District (Paradox Valley District)
        • La Sal
Canadian Mineralogist 46,679-686(2008)
        • Lion Canyon
Canadian Mineralogist46,679-686(2008); 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
Gunnar Farber
Mineral and/or Locality  
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