Meta-alunogen
A valid IMA mineral species - grandfathered - questionable
This page is currently not sponsored. Click here to sponsor this page.
Formula:
Al2(SO4)3 · 12H2O
Colour:
White, pale yellow
Lustre:
Waxy, Pearly
Specific Gravity:
2.85 (Calculated)
Crystal System:
Orthorhombic
Name:
Named for being a lower hydrate counterpart of alunogen.
The lower hydrate counterpart of alunogen. Compare also Unnamed (Al Sulphate-Hydrate), 'UM1987-13-SO:AlH' and 'UM1976-22-SO:AlFeH'.
Unique Identifiers
Mindat ID:
2660
Long-form identifier:
mindat:1:1:2660:0
GUID
(UUID V4):
(UUID V4):
3dfee110-5e80-4adc-a7c1-71969915d8cf
IMA Classification of Meta-alunogen
Approved, 'Grandfathered' (first described prior to 1959), Questionable
IMA Formula:
Al2(SO4)3 · 14H2O
Classification of Meta-alunogen
7.CB.45
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
B : With only medium-sized cations
7 : SULFATES (selenates, tellurates, chromates, molybdates, wolframates)
C : Sulfates (selenates, etc.) without additional anions, with H2O
B : With only medium-sized cations
29.8.7.1
29 : HYDRATED ACID AND NORMAL SULFATES
8 : A2(XO4)3·H2O
29 : HYDRATED ACID AND NORMAL SULFATES
8 : A2(XO4)3·H2O
25.6.6
25 : Sulphates
6 : Sulphates of Al and Tl
25 : Sulphates
6 : Sulphates of Al and Tl
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 |
---|---|---|
Malg | 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 Meta-alunogen
Waxy, Pearly
Transparency:
Translucent
Colour:
White, pale yellow
Cleavage:
Perfect
{010}
{010}
Density:
2.85 g/cm3 (Calculated)
Optical Data of Meta-alunogen
Type:
Biaxial (+)
RI values:
nα = 1.469 nβ = 1.473 nγ = 1.491
Max Birefringence:
δ = 0.022
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:
Moderate
Dispersion:
relatively weak
Comments:
2V(meas.) = Large.
Chemistry of Meta-alunogen
Mindat Formula:
Al2(SO4)3 · 12H2O
Elements listed:
Crystallography of Meta-alunogen
Crystal System:
Orthorhombic
Cell Parameters:
a = 12.25 Å, b = 13.95 Å, c = 15.95 Å
Ratio:
a:b:c = 0.878 : 1 : 1.143
Unit Cell V:
2,725.66 ų (Calculated from Unit Cell)
Comment:
Point Group: n.d. Space Group: n.d. synthetic
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
4.071 Å | (100) |
12.20 Å | (26) |
6.114 Å | (11) |
3.860 Å | (9) |
4.208 Å | (7) |
3.990 Å | (5) |
3.024 Å | (4) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Near-surface Processes | |
25 : Evaporites (prebiotic) | |
Stage 7: Great Oxidation Event | <2.4 |
46 : Near-surface hydrothermal alteration of minerals (see also #22) |
Type Occurrence of Meta-alunogen
Associated Minerals at Type Locality:
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Strunz-mindat Grouping
7.CB. | Sarvodaite | Al2(SO4)3 · 5H2O |
7.CB.02 | Voudourisite | CdSO4 · H2O |
7.CB.05 | Dwornikite | Ni(SO4) · H2O |
7.CB.05 | Gunningite | ZnSO4 · H2O |
7.CB.05 | Kieserite | MgSO4 · H2O |
7.CB.05 | Poitevinite | (Cu,Fe)SO4 · H2O |
7.CB.05 | Szmikite | MnSO4 · H2O |
7.CB.05 | Szomolnokite | FeSO4 · H2O |
7.CB.05 | Cobaltkieserite | CoSO4 · H2O |
7.CB.07 | Sanderite | MgSO4 · 2H2O |
7.CB.10 | Bonattite | CuSO4 · 3H2O |
7.CB.12 | Belogubite | CuZn(SO4)2 · 10H2O |
7.CB.15 | Aplowite | (Co,Mn,Ni)SO4 · 4H2O |
7.CB.15 | Boyleite | (Zn,Mg)SO4 · 4H2O |
7.CB.15 | Ilesite | (Mn,Zn,Fe)SO4 · 4H2O |
7.CB.15 | Rozenite | FeSO4 · 4H2O |
7.CB.15 | Starkeyite | MgSO4 · 4H2O |
7.CB.15 | Drobecite | CdSO4 · 4H2O |
7.CB.15 | Cranswickite | MgSO4 · 4H2O |
7.CB.20 | Chalcanthite | CuSO4 · 5H2O |
7.CB.20 | Jôkokuite | MnSO4 · 5H2O |
7.CB.20 | Pentahydrite | MgSO4 · 5H2O |
7.CB.20 | Siderotil | FeSO4 · 5H2O |
7.CB.25 | Bianchite | Zn(SO4) · 6H2O |
7.CB.25 | Chvaleticeite | Mn(SO4) · 6H2O |
7.CB.25 | Ferrohexahydrite | FeSO4 · 6H2O |
7.CB.25 | Hexahydrite | MgSO4 · 6H2O |
7.CB.25 | Moorhouseite | Co(SO4) · 6H2O |
7.CB.25 | Nickelhexahydrite | Ni(SO4) · 6H2O |
7.CB.30 | Retgersite | NiSO4 · 6H2O |
7.CB.35 | Bieberite | CoSO4 · 7H2O |
7.CB.35 | Boothite | CuSO4 · 7H2O |
7.CB.35 | Mallardite | MnSO4 · 7H2O |
7.CB.35 | Melanterite | Fe2+(H2O)6SO4 · H2O |
7.CB.35 | Zincmelanterite | (Zn,Cu,Fe)SO4 · 7H2O |
7.CB.35 | Alpersite | (Mg,Cu)(SO4) · 7H2O |
7.CB.40 | Epsomite | MgSO4 · 7H2O |
7.CB.40 | Goslarite | ZnSO4 · 7H2O |
7.CB.40 | Morenosite | NiSO4 · 7H2O |
7.CB.45 | Alunogen | Al2(SO4)3 · 17H2O |
7.CB.50 | Aluminocoquimbite | Al2Fe2(SO4)6(H2O)12 · 6H2O |
7.CB.50 | Lazaridisite | 3CdSO4 · 8H2O |
7.CB.52 | Pararaisaite | CuMg[Te6+O4(OH)2] · 6H2O |
7.CB.55 | Coquimbite | AlFe3(SO4)6(H2O)12 · 6H2O |
7.CB.55 | Paracoquimbite | Fe4(SO4)6(H2O)12 · 6H2O |
7.CB.55 | Rhomboclase | (H5O2)Fe3+(SO4)2 · 2H2O |
7.CB.55 | Raisaite | CuMg[Te6+O4(OH)2] · 6H2O |
7.CB.57 | Caichengyunite | Fe2+3Al2(SO4)6 · 30H2O |
7.CB.60 | Kornelite | Fe2(SO4)3 · 7H2O |
7.CB.65 | Quenstedtite | Fe2(SO4)3 · 11H2O |
7.CB.70 | Lausenite | Fe2(SO4)3 · 5H2O |
7.CB.75 | Lishizhenite | ZnFe2(SO4)4 · 14H2O |
7.CB.75 | Römerite | Fe2+Fe3+2(SO4)4 · 14H2O |
7.CB.80 | Ransomite | CuFe2(SO4)4 · 6H2O |
7.CB.85 | Apjohnite | Mn2+Al2(SO4)4 · 22H2O |
7.CB.85 | Bílinite | Fe2+Fe3+2(SO4)4 · 22H2O |
7.CB.85 | Dietrichite | (Zn,Fe2+,Mn2+)Al2(SO4)4 · 22H2O |
7.CB.85 | Halotrichite | FeAl2(SO4)4 · 22H2O |
7.CB.85 | Pickeringite | MgAl2(SO4)4 · 22H2O |
7.CB.85 | Redingtonite | (Fe2+,Mg,Ni)(Cr,Al)2(SO4)4 · 22H2O |
7.CB.85 | Wupatkiite | (Co,Mg,Ni)Al2(SO4)4 · 22H2O |
7.CB.90 | Meridianiite | MgSO4 · 11H2O |
Other Information
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 Meta-alunogen
mindat.org URL:
https://www.mindat.org/min-2660.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
Mineral Dealers:
References for Meta-alunogen
Reference List:
Localities for Meta-alunogen
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.
Chile | |
| SEM-EDS |
| S. G. Gordon (1942) +1 other reference |
Costa Rica | |
| Rodríguez et al. (2017) |
Lebanon | |
| Kruszewski et al. (South Lebanon) |
New Zealand | |
| Martin et al. (1999) |
| Rod Martin et al. (NZ) |
| Krupp et al. (1987) |
Poland | |
| Kruszewski et al. (2019) |
Russia | |
| Kudrin et al. (2021) |
Slovakia | |
| Duda |
USA | |
| Anthony et al. (1995) |
| Chemical Geology Volume 215 |