Ammoniolasalite
A valid IMA mineral species
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About Ammoniolasalite
Formula:
(NH4)2Mg2(H2O)20] [V10O28]
Colour:
Bright orange to orange-yellow
Lustre:
Vitreous
Hardness:
1
Specific Gravity:
2.28
Crystal System:
Monoclinic
Name:
The ammonium analogue of lasalite.
Unique Identifiers
Mindat ID:
52841
Long-form identifier:
mindat:1:1:52841:4
GUID
(UUID V4):
(UUID V4):
1e4ca31c-771b-45d9-9e85-52e0ccb0525f
IMA Classification of Ammoniolasalite
Approved
IMA Formula:
[(NH4)2Mg2(H2O)20] · [V10O28]
First published:
2018
Classification of Ammoniolasalite
4.HC.
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 |
|---|---|---|
| Alas | 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 Ammoniolasalite
Vitreous
Transparency:
Transparent
Colour:
Bright orange to orange-yellow
Streak:
Light orange
Hardness:
1 on Mohs scale
Comment:
Based on scratch tests
Tenacity:
Brittle
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
2.28(2) g/cm3 (Measured) 2.278(2) g/cm3 (Calculated)
Comment:
Calculated 2.278 for the empirical formula and 2.271 for the ideal formula.
Optical Data of Ammoniolasalite
Type:
Biaxial (-)
RI values:
nα = 1.740(3) nβ = 1.769(3) nγ = 1.771(3)
2V:
Measured: 31° (1)
Max Birefringence:
δ = 0.031
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:
High
Dispersion:
Dispersion is very strong, r > v
Pleochroism:
Visible
Comments:
X yellow, Y yellow orange, Z orange
X , Y , Z
X , Y , Z
Comments:
Y = b, Z Λ a = 38° in obtuse b.
Chemistry of Ammoniolasalite
Mindat Formula:
(NH4)2Mg2(H2O)20] [V10O28]
Crystallography of Ammoniolasalite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/b
Setting:
C2/c
Cell Parameters:
a = 24.478(3) Å, b = 10.9413(4) Å, c = 17.551(1) Å
β = 17.551(7)°
β = 17.551(7)°
Ratio:
a:b:c = 2.237 : 1 : 1.604
Unit Cell V:
1,417.47 ų (Calculated from Unit Cell)
Z:
4
Morphology:
Short prismatic (on [101])to equant crystals, often exhibiting stepped or skeletal faces. Forms include {001}, {110}, {101},
{111}, {111}, {201}, and {311}.
{111}, {111}, {201}, and {311}.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 10.64 Å | (24) |
| 9.43 Å | (100) |
| 8.57 Å | (21) |
| 7.62 Å | (26) |
| 6.80 Å | (32) |
| 2.891 Å | (13) |
| 2.725 Å | (23) |
| 2.125 Å | (13) |
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 Ammoniolasalite
General Appearance of Type Material:
occurs as crusts on montroseite- and corvusite-bearing sandstone
Place of Conservation of Type Material:
Cotype material is deposited in the mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Blvd, Los Angeles, California, USA, catalogue numbers 67477, 67478, 67479, 67480 and 67481
Geological Setting of Type Material:
Sandstone uranium and vanadium occurrence
Associated Minerals at Type Locality:
Reference:
Kampf, A.R., Nash, B.P., Adams, P.M., Marty, J., Hughes, J.M. (2018) Ammoniolasalite,[(NH4)2Mg2(H2O)20][V10O28], a New Decavanadate Species from the Burro Mine, Slick Rock District, Colorado. The Canadian Mineralogist: 56(6): 859-869.
Synonyms of Ammoniolasalite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
| 4.HC. | Beckettite | Ca2V6Al6O20 |
| 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.05 | Hydropascoite | Ca3(V10O28) · 24H2O |
| 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 Ammoniolasalite
does not exhibit fluorescence in long- or short-wave ultraviolet light
Other Information
Notes:
At room temperature ammoniolasalite is slowly soluble in H2O (minutes) and rapidly soluble in dilute HCl (seconds).
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 Ammoniolasalite
mindat.org URL:
https://www.mindat.org/min-52841.html
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References for Ammoniolasalite
Reference List:
Localities for Ammoniolasalite
symbol to view information about a locality.
The 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).
All localities listed without proper references should be considered as questionable.
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Burro Mine, Slick Rock Mining District, San Miguel County, Colorado, USA