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About MagnesiopascoiteHide

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

Classification of MagnesiopascoiteHide

Approval Year:

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

3 : Hydrated Normal Vanadium Oxysalts

Optical Data of MagnesiopascoiteHide

Biaxial (-)
RI values:
nα = 1.769(3) nβ = 1.802(3) nγ = 1.807(3)
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
r < v, crossed
Y (orange) > X (yellow, Z (yellow)

Chemical Properties of MagnesiopascoiteHide

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

Crystallography of MagnesiopascoiteHide

Crystal System:
Class (H-M):
2/m - Prismatic
Space Group:
Cell Parameters:
a = 19.8442 Å, b = 9.9353 Å, c = 10.7149 Å
β = 120.305°
a:b:c = 1.997 : 1 : 1.078
Unit Cell V:
1823.9 ų
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)
none observed

X-Ray Powder DiffractionHide

Powder Diffraction Data:
9.242 Å(20)
8.872 Å(30)
8.571 Å(100)
7.270 Å(40)
5.477 Å(15)
4.590 Å(15)
4.355 Å(15)
2.137 Å(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.Ammoniolasalite(NH4)2Mg2(H2O)20] [V10O28]Mon. 2/m : B2/b
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,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.
  • Colorado
    • Mesa Co.
      • Gateway
Kampf, A.R., Nash, B.P., Marty, J., Hughes, J.M. (2017) Mesaite, CaMn2+5(V2O7)3·12H2O, a new vanadate mineral from the Packrat mine, near Gateway, Mesa County, Colorado, USA. Mineralogical Magazine: 81: 319–327.
    • Montrose Co.
      • Bull Canyon Mining 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
    • San Miguel Co.
      • Slick Rock Mining District
Kampf, A. R., Plášil, J., Nash, B. P., & Marty, J. (2019). Ammoniomathesiusite, a new uranyl sulfate–vanadate mineral from the Burro mine, San Miguel County, Colorado, USA. Mineralogical Magazine, 83(1), 115-121.
  • Utah
    • San Juan Co.
      • La Sal Mountains
        • La Sal Mining District (Paradox Valley Mining District)
          • La Sal
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(1): 45-53.
          • 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 Färber
Mineral and/or Locality  
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