Hydropascoite
A valid IMA mineral species
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Formula:
Ca3(V10O28) · 24H2O
Colour:
dark yellow green
Lustre:
Vitreous
Hardness:
1½
Specific Gravity:
2.38
Crystal System:
Triclinic
Name:
Named after its similarity to pascoite, as it is the higher hydrate of the same substance (calcium decavanadate)
First found in the main tunnel level of the Packrat mine. Related to pascoite. Also similar to kokinosite and nashite in terms of being both a decavanadate and a tetracosahydrate.
Unique Identifiers
Mindat ID:
47934
Long-form identifier:
mindat:1:1:47934:9
GUID
(UUID V4):
(UUID V4):
ac89fc1e-2e76-4447-ada8-88b66fe9a12e
Classification of Hydropascoite
Approved
Approval year:
2016
First published:
2017
Type description reference:
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
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
H : V[5,6] Vanadates
C : [6]-Sorovanadates
Mineral Symbols
As of 2021 there are now IMA–CNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
Symbol | Source | Reference |
---|---|---|
Hpas | IMA–CNMNC | Warr, L.N. (2021). IMA–CNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Hydropascoite
Vitreous
Transparency:
Transparent
Colour:
dark yellow green
Streak:
pistachio green
Hardness:
1½ on Mohs scale
Tenacity:
Brittle
Fracture:
Irregular/Uneven
Density:
2.38(2) g/cm3 (Measured) 2.332 g/cm3 (Calculated)
Optical Data of Hydropascoite
Type:
Biaxial (-)
RI values:
nα = 1.730(5) nβ = 1.780(5) nγ = 1.790(5)
2V:
Measured: 54.1° (6), Calculated: 47.1°
Max Birefringence:
δ = 0.060
Image shows birefringence interference colour range (at 30µm thickness)
and does not take into account mineral colouration.
and does not take into account mineral colouration.
Surface Relief:
Very High
Dispersion:
extreme
Pleochroism:
Visible
Comments:
X=bluish green, Y=orange, Z = yellowish green
Chemical Properties of Hydropascoite
Formula:
Ca3(V10O28) · 24H2O
Elements listed:
Crystallography of Hydropascoite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Setting:
P1
Cell Parameters:
a = 10.0870(2) Å, b = 11.0708(2) Å, c = 21.811(1) Å
α = 94.112(7)°, β = 96.053(7)°, γ = 116.398(8)°
α = 94.112(7)°, β = 96.053(7)°, γ = 116.398(8)°
Ratio:
a:b:c = 0.911 : 1 : 1.97
Unit Cell V:
2,150.21 ų (Calculated from Unit Cell)
Z:
2
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
10.70 Å | (31) |
9.77 Å | (28) |
8.92 Å | (100) |
7.75 Å | (20) |
7.41 Å | (22) |
6.91 Å | (20) |
3.524 Å | (13) |
2.988 Å | (14) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 7: Great Oxidation Event | <2.4 |
47a : [Near-surface hydration of prior minerals] | |
47e : [Vanadates, chromates, manganates] | |
47h : [Near-surface oxidized, dehydrated minerals] | |
Stage 10b: Anthropogenic minerals | <10 Ka |
55 : Anthropogenic mine minerals |
Type Occurrence of Hydropascoite
General Appearance of Type Material:
blades up to 2 mm in length
Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, Los Angeles, California, USA (catalogue number 66267)
Reference:
Kampf, A.R., Nash, B.P., Marty, J., Hughes, J.M., Rose, T.P. (2017) Hydropascoite, Ca3 (V10O28)· 24H2O, a new decavanadate mineral from the Packrat mine, Mesa County, Colorado. The Canadian Mineralogist: 55(2): 207-217.
Synonyms of Hydropascoite
Related Minerals - Strunz-mindat Grouping
4.HC. | Beckettite | Ca2V6Al6O20 |
4.HC. | Ammoniolasalite | (NH4)2Mg2(H2O)20] [V10O28] |
4.HC. | Protocaseyite | [Al4(OH)6(H2O)12][V10O28] · 8H2O |
4.HC.05 | Pascoite | Ca2Ca(V10O28) · 17H2O |
4.HC.05 | Lasalite | Na2Mg2(V10O28) · 20H2O |
4.HC.05 | Magnesiopascoite | Ca2Mg(V10O28) · 16H2O |
4.HC.05 | Rakovanite | (NH4)3Na3(V10O28) · 12H2O |
4.HC.05 | Hughesite | Na3Al(V10O28) · 22H2O |
4.HC.10 | Hummerite | K2Mg2(V10O28) · 16H2O |
4.HC.15 | Sherwoodite | Ca5.5(AlV4+V5+12O39) · 28H2O |
4.HC.20 | Bluestreakite | K4Mg2(V4+2V5+8O28) · 14H2O |
4.HC.25 | Wernerbaurite | {(NH4)2[Ca2(H2O)14](H2O)2}{V10O28} |
4.HC.25 | Burroite | Ca2(NH4)2(V10O28) · 15H2O |
4.HC.30 | Caseyite | [(V5+O2)Al10-x(OH)20-2x(H2O)18-2x]2[H2V4+V5+9O28][V5+10O28]2(Na,K,Ca)2-y(SO4)2-z · (60+8x+y+4z)H2O (x = 0-2.5; y = 0-2; z = 0-2) |
4.HC.35 | Gunterite | Na4Ca(V10O28) · 20H2O |
4.HC.40 | Kokinosite | Na2Ca2(V10O28) · 24H2O |
4.HC.45 | Nashite | Na3Ca2[(V5+9V4+)O28] · 24H2O |
4.HC.50 | Okieite | Mg3[V10O28] · 28H2O |
4.HC.55 | Postite | Mg(H2O)6Al2(OH)2(H2O)8(V10O28) · 13H2O |
4.HC.60 | Schindlerite | {(NH4)4Na2(H2O)10}{V10O28} |
Fluorescence of Hydropascoite
none
Other Information
Notes:
very slowly soluble in H2O and immediately soluble in dilute HCl.
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 Hydropascoite
mindat.org URL:
https://www.mindat.org/min-47934.html
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External Links:
Mineral Dealers:
References for Hydropascoite
Reference List:
Localities for Hydropascoite
Locality List
- 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.
All localities listed without proper references should be considered as questionable.
USA (TL) | |
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