Monteneroite
A valid IMA mineral species
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About Monteneroite
Monte Nero Mine (southern side)
Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy
Formula:
Cu2+Mn2+2(AsO4)2 · 8H2O
Colour:
Light green
Lustre:
Vitreous
Hardness:
2
Specific Gravity:
2.97
Crystal System:
Monoclinic
Member of:
Name:
Named for the Monte Nero Mine, Italy, the type locality.
Structurally related to vivianite. Compare klajite and dixenite.
Monteneroite is an ordered intermediate between manganohörnesite, Mn2+3(AsO4)2·8H2O, and babánekite, Cu2+3(AsO4)2·8H2O.
Monteneroite is an ordered intermediate between manganohörnesite, Mn2+3(AsO4)2·8H2O, and babánekite, Cu2+3(AsO4)2·8H2O.
Unique Identifiers
Mindat ID:
55040
Long-form identifier:
mindat:1:1:55040:4
IMA Classification of Monteneroite
Approved
IMA Formula:
Cu2+Mn2+2(As5+O4)2·8H2O
First published:
2020
Type description reference:
Kampf, Anthony R., Plášil, Jakub, Nash, Barbara P., Ciriotti, Marco E., Castellaro, Fabrizio, Chiappino, Luigi (2020) Monteneroite, Cu2+Mn2+2(AsO4)2⋅8H2O, a new vivianite-structure mineral with ordered cations from the Monte Nero mine, Liguria, Italy. Mineralogical Magazine, 84 (6) 881-887 doi:10.1180/mgm.2020.76
Classification of Monteneroite
8.CE.
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
E : With only medium-sized cations, RO4:H2O about 1:2.5
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 for Standard |
|---|---|---|
| Mte | 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 Monteneroite
Vitreous
Transparency:
Transparent
Colour:
Light green
Streak:
White
Hardness:
2 on Mohs scale
Hardness Data:
Measured
Comment:
Measured by scratch tests
Tenacity:
Sectile
Cleavage:
Perfect
{010} perfect and {001} fair
{010} perfect and {001} fair
Fracture:
Irregular/Uneven, Step-Like
Density:
2.97(2) g/cm3 (Measured) 2.983 g/cm3 (Calculated)
Comment:
Calculated 2.983 for the empirical formula and 2.988 for the ideal formula
Optical Data of Monteneroite
Type:
Biaxial (+)
RI values:
nα = 1.604(2) nβ = 1.637(2) nγ = 1.688(2)
2V:
Measured: 80° (1)
Max. Birefringence:
δ = 0.084
Based on recorded range of RI values above.
Based on recorded range of RI values above.
Interference Colours:
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
The colours simulate birefringence patterns seen in thin section under crossed polars. They do not take into account mineral colouration or opacity.
Michel-Levy Bar The default colours simulate the birefringence range for a 30 µm thin-section thickness. Adjust the slider to simulate a different thickness.
Grain Simulation You can rotate the grain simulation to show how this range might look as you rotated a sample under crossed polars. Each grain retains its interference colour (retardation) while its brightness falls to black at extinction and reaches a maximum between extinction positions.
Surface Relief:
High (positive)
Relative to Canada balsam mounting medium (n ≈ 1.537).
Relative to Canada balsam mounting medium (n ≈ 1.537).
This shows the grain boundary and Becke line effect under plane-polarised
light, based on the contrast between this mineral's average refractive
index and the mounting medium. It does not take into account mineral
colouration.
In focus
Interference Figure:
This shows the idealized biaxial acute bisectrix (Bxa) interference figure
- the conoscopic view for a grain cut perpendicular to the acute bisectrix, using
this mineral's 2V. The two small white dots mark the melatopes - the points
where the two optic axes emerge - and are shown only when they fall within the
field of view. The coloured bands are isochromatics, and the dark bands are
isogyres.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Rotate the stage: at 0°/90° the isogyres form a cross through the melatopes; at 45° they pull apart into curved hyperbolas. That splitting on rotation - absent in a uniaxial figure - is the standard diagnostic test for telling biaxial minerals from uniaxial ones. If 2V is large, the melatopes may fall outside the field of view, as they often do at the microscope too.
Dispersion:
Slight, r < v
Pleochroism:
Not Visible
Comments:
X = b; Z Λ c = 52° in obtuse β
Chemistry of Monteneroite
Mindat Formula:
Cu2+Mn2+2(AsO4)2 · 8H2O
Element Weights:
Crystallography of Monteneroite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
B2/m
Setting:
C2/m
Cell Parameters:
a = 10.3673(14) Å, b = 13.713(2) Å, c = 4.8420(8) Å
β = 105.992(8)°
β = 105.992(8)°
Ratio:
a:b:c = 0.756 : 1 : 0.353
Unit Cell V:
661.72 ų
Z:
2
Morphology:
Thick blades, elongated on [001] and flattened on {010}, exhibiting the forms {010}, {110}, {101} and {30–1}. Forms were estimated.
Twinning:
None observed
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.08 Å | (38) |
| 6.86 Å | (100) |
| 4.507 Å | (50) |
| 3.287 Å | (75) |
| 3.032 Å | (94) |
| 2.751 Å | (88) |
| 2.372 Å | (44) |
| 1.938 Å | (35) |
Reference:
Kampf, Anthony R., Plášil, Jakub, Nash, Barbara P., Ciriotti, Marco E., Castellaro, Fabrizio, Chiappino, Luigi (2020) Monteneroite, Cu2+Mn2+2(AsO4)2⋅8H2O, a new vivianite-structure mineral with ordered cations from the Monte Nero mine, Liguria, Italy. Mineralogical Magazine, 84 (6) 881-887 doi:10.1180/mgm.2020.76
Type Occurrence of Monteneroite
General Appearance of Type Material:
Light green, thick blades up to ~2.5 mm long.
Place of Conservation of Type Material:
Mineralogical collections of the Natural History Museum of Los Angeles County, 900 Exposition Boulevard, Los Angeles, CA 90007, USA, catalogue number 67509
Associated Minerals at Type Locality:
Reference:
Kampf, Anthony R., Plášil, Jakub, Nash, Barbara P., Ciriotti, Marco E., Castellaro, Fabrizio, Chiappino, Luigi (2020) Monteneroite, Cu2+Mn2+2(AsO4)2⋅8H2O, a new vivianite-structure mineral with ordered cations from the Monte Nero mine, Liguria, Italy. Mineralogical Magazine, 84 (6) 881-887 doi:10.1180/mgm.2020.76
Other Language Names for Monteneroite
Dutch:Monteneroiet
German:Monteneroit
Relationship of Monteneroite to other Species
Member of:
Other Members of Vivianite Group:
| Annabergite | Ni3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| Arupite | Ni3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| Babánekite | Cu3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| Barićite | (Mg,Fe)3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| Cabrerite | NiMg2(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| Erythrite | Co3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| Gritsenkoite | CoMg2(AsO4)2(H2O)8 | Mon. 2/m : B2/m |
| Hörnesite | Mg3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| Köttigite | Zn3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| Manganohörnesite | Mn2+3(AsO4)2 · 8H2O | Mon. 2/m : P2/m |
| Pakhomovskyite | Co3(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| Parasymplesite | Fe2+3(AsO4)2 · 8H2O | Mon. 2/m : B2/m |
| Vivianite | Fe2+Fe2+2(PO4)2 · 8H2O | Mon. 2/m : B2/m |
| Zincocabrerite | ZnMg2(AsO4)2(H2O)8 | Mon. 2/m : B2/m |
Related Minerals - Strunz-mindat Grouping
| 8.CE. | Belmonteite | CaMn2(AsO4)2 · 7H2O |
| 8.CE. | Zincocabrerite | ZnMg2(AsO4)2(H2O)8 |
| 8.CE.X | Babánekite | Cu3(AsO4)2 · 8H2O |
| 8.CE.05 | Chudobaite | Mg5(AsO4)2(AsO3OH)2 · 10H2O |
| 8.CE.05 | Geigerite | Mn2+5(AsO4)2(HAsO4)2 · 10H2O |
| 8.CE.10 | Newberyite | Mg(PO3OH) · 3H2O |
| 8.CE.10 | Manganonewberyite | Mn(PO3OH)(H2O)3 |
| 8.CE.15 | Fanguangite | (MoO2)(PO3OH) · 4H2O |
| 8.CE.15 | Brassite | Mg(HAsO4) · 4H2O |
| 8.CE.20 | Phosphorrösslerite | Mg(PO3OH) · 7H2O |
| 8.CE.20 | Rösslerite | Mg(HAsO4) · 7H2O |
| 8.CE.25 | Switzerite | Mn2+3(PO4)2 · 7H2O |
| 8.CE.25 | Metaswitzerite | Mn2+3(PO4)2 · 4H2O |
| 8.CE.30 | Pradetite | CoCu4(AsO4)2(HAsO4)2 · 9H2O |
| 8.CE.30 | Veselovskýite | ZnCu4(AsO4)2(HAsO4)2 · 9H2O |
| 8.CE.30 | Lindackerite | CuCu4(AsO4)2(HAsO4)2 · 9H2O |
| 8.CE.30 | Klajite | MnCu4(AsO4)2(HAsO4)2 · 9-10H2O |
| 8.CE.30 | Hloušekite | (Ni,Co)Cu4(AsO4)2(AsO3OH)2 · 9H2O |
| 8.CE.30 | Ondrušite | CaCu4(AsO4)2(HAsO4)2 · 10H2O |
| 8.CE.35 | Bobierrite | Mg3(PO4)2 · 8H2O |
| 8.CE.40 | Barićite | (Mg,Fe)3(PO4)2 · 8H2O |
| 8.CE.40 | Parasymplesite | Fe2+3(AsO4)2 · 8H2O |
| 8.CE.40 | Gritsenkoite | CoMg2(AsO4)2(H2O)8 |
| 8.CE.40 | Cabrerite | NiMg2(AsO4)2 · 8H2O |
| 8.CE.40 | Pakhomovskyite | Co3(PO4)2 · 8H2O |
| 8.CE.40 | Vivianite | Fe2+Fe2+2(PO4)2 · 8H2O |
| 8.CE.40 | Arupite | Ni3(PO4)2 · 8H2O |
| 8.CE.40 | Erythrite | Co3(AsO4)2 · 8H2O |
| 8.CE.40 | Hörnesite | Mg3(AsO4)2 · 8H2O |
| 8.CE.40 | Manganohörnesite | Mn2+3(AsO4)2 · 8H2O |
| 8.CE.40 | Köttigite | Zn3(AsO4)2 · 8H2O |
| 8.CE.40 | Ferrisymplesite | Fe3+3(AsO4)2(OH)3 · 5H2O |
| 8.CE.40 | Annabergite | Ni3(AsO4)2 · 8H2O |
| 8.CE.45 | Symplesite | Fe2+3(AsO4)2 · 8H2O |
| 8.CE.50 | Cattiite | Mg3(PO4)2 · 22H2O |
| 8.CE.55 | Koninckite | Fe3+PO4 · 3H2O |
| 8.CE.60 | Kaňkite | FeAsO4 · 3.5H2O |
| 8.CE.60 | Hilarionite | Fe3+2(SO4)(AsO4)(OH) · 6H2O |
| 8.CE.65 | Steigerite | Al(VO4) · 3H2O |
| 8.CE.70 | Metaschoderite | Al2(PO4)(VO4) · 6H2O |
| 8.CE.70 | Schoderite | Al2(PO4)(VO4) · 8H2O |
| 8.CE.75 | Zigrasite | MgZr(PO4)2 · 4H2O |
| 8.CE.75 | 'UM2009-11-PO:CaHZr' | CaZr[PO4]2 · 4H2O |
| 8.CE.75 | Malhmoodite | FeZr(PO4)2 · 4H2O |
| 8.CE.80 | Santabarbaraite | Fe3+3(PO4)2(OH)3 · 5H2O |
| 8.CE.85 | Metaköttigite | (Zn,Fe,Fe)3(AsO4)2 · 8(H2O,OH) |
| 8.CE.90 | Slavkovite | Cu13(AsO4)6(AsO3OH)4 · 23H2O |
Fluorescence of Monteneroite
Does not fluoresce under long– or short–wave ultraviolet light.
Other Information
Notes:
Dissolves rapidly in dilute HCl at room temperature.
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 Monteneroite
mindat.org URL:
https://www.mindat.org/min-55040.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
Mineral Dealers:
References for Monteneroite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2020) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 56. European Journal of Mineralogy, 32 (4) 443-448 doi:10.5194/ejm-32-443-2020
Kampf, Anthony R., Plášil, Jakub, Nash, Barbara P., Ciriotti, Marco E., Castellaro, Fabrizio, Chiappino, Luigi (2020) Monteneroite, Cu2+Mn2+2(AsO4)2⋅8H2O, a new vivianite-structure mineral with ordered cations from the Monte Nero mine, Liguria, Italy. Mineralogical Magazine, 84 (6) 881-887 doi:10.1180/mgm.2020.76
Localities for Monteneroite
Showing 1 localities.
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.
Italy (TL) | |
| Kampf et al. (2020) +1 other reference |
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Monte Nero Mine, Rocchetta di Vara, La Spezia Province, Liguria, Italy