Raydemarkite
A valid IMA mineral species
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About Raydemarkite
Ray DeMark
Formula:
MoO3 · H2O
Colour:
Colorless
Lustre:
Vitreous
Hardness:
1½
Specific Gravity:
3.44
Crystal System:
Triclinic
Name:
Named for Ramon (Ray) DeMark (b. 1937), an avid New Mexico field collector and finder of the type specimen.
Dimorph of:
Known synthetic analogue. The lower-hydrate counterpart of sidwillite and the monohydrated counterpart of molybdite. Also a higher hydrate compared to tianhuixinite.
Also compare ilsemannite.
Also compare ilsemannite.
Unique Identifiers
Mindat ID:
56153
Long-form identifier:
mindat:1:1:56153:4
GUID
(UUID V4):
(UUID V4):
6dc848ce-58b2-482a-8457-11d50e78c100
IMA Classification of Raydemarkite
Approved
First published:
2023
Approval history:
IMA no. 2022-015.
Type description reference:
Yang, Hexiong, Gu, Xiangping, Sousa, Francis X., Gibbs, Ronald B., McGlasson, James A., Downs, Robert T. (2023) Raydemarkite, the Natural Analogue of Synthetic α-MoO3·H2O, from Cookes Peak, Luna County, New Mexico, USA. The Canadian Journal of Mineralogy and Petrology, 61 (1) 203-213 doi:10.3749/2200049
Classification of Raydemarkite
4.FJ.
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
J : Hydroxides with H2O +- (OH); corner-sharing octahedra
4 : OXIDES (Hydroxides, V[5,6] vanadates, arsenites, antimonites, bismuthites, sulfites, selenites, tellurites, iodates)
F : Hydroxides (without V or U)
J : Hydroxides with H2O +- (OH); corner-sharing octahedra
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 |
|---|---|---|
| Ryd | 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 Raydemarkite
Vitreous
Transparency:
Transparent
Colour:
Colorless
Streak:
White
Hardness:
1½ on Mohs scale
Tenacity:
Flexible
Cleavage:
Perfect
{100} and {001}.
{100} and {001}.
Density:
3.44(5) g/cm3 (Measured) 3.41 g/cm3 (Calculated)
Chemistry of Raydemarkite
Mindat Formula:
MoO3 · H2O
Elements listed:
Crystallography of Raydemarkite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 7.3750(2) Å, b = 3.7092(1) Å, c = 6.6833(2) Å
α = 108.108(1)°, β = 112.779(2)°, γ = 91.742(1)°
α = 108.108(1)°, β = 112.779(2)°, γ = 91.742(1)°
Ratio:
a:b:c = 1.988 : 1 : 1.802
Unit Cell V:
157.83 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Acicular or prismatic crystals.
Twinning:
Common on (010).
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.693 Å | (18) |
| 5.759 Å | (100) |
| 3.334 Å | (40) |
| 3.277 Å | (36) |
| 3.181 Å | (16) |
| 3.058 Å | (18) |
| 2.829 Å | (16) |
| 1.852 Å | (13) |
Comments:
Summit group (Poe Mines), New Mexico, USA. Data from the type description.
Type Occurrence of Raydemarkite
General Appearance of Type Material:
Sprays of acicular or prismatic crystals up to 1.00 × 0.10 × 0.06 mm.
Place of Conservation of Type Material:
Mineralogical collections of (1) the University of Arizona Alfie Norville Gem and Mineral Museum, catalogue no. 22717 (holotype), and (2) the RRUFF Project, deposition no. R210023 (cotype).
Associated Minerals at Type Locality:
Common Associates
Associated Minerals Based on Photo Data:
| 11 photos of Raydemarkite associated with Sidwillite | MoO3 · 2H2O |
| 4 photos of Raydemarkite associated with Ilsemannite | Mo3O8 · nH2O |
| 1 photo of Raydemarkite associated with Jordisite | MoS2 |
| 1 photo of Raydemarkite associated with Baryte | BaSO4 |
Related Minerals - Strunz-mindat Grouping
| 4.FJ.05 | Meymacite | WO3 · 2H2O |
| 4.FJ.05 | Sidwillite | MoO3 · 2H2O |
| 4.FJ.10 | Tungstite | WO3 · H2O |
| 4.FJ.15 | Hydrotungstite | WO3 · 2H2O |
| 4.FJ.15 | Ilsemannite | Mo3O8 · nH2O |
Other Information
Notes:
Insoluble in water or hydrochloric acid.
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 Raydemarkite
mindat.org URL:
https://www.mindat.org/min-56153.html
Please feel free to link to this page.
Please feel free to link to this page.
Search Engines:
External Links:
References for Raydemarkite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2022) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) – Newsletter 68. European Journal of Mineralogy, 34 (5) 385-391 doi:10.5194/ejm-34-385-2022
Yang, Hexiong, Gu, Xiangping, Sousa, Francis X., Gibbs, Ronald B., McGlasson, James A., Downs, Robert T. (2023) Raydemarkite, the Natural Analogue of Synthetic α-MoO3·H2O, from Cookes Peak, Luna County, New Mexico, USA. The Canadian Journal of Mineralogy and Petrology, 61 (1) 203-213 doi:10.3749/2200049
Localities for Raydemarkite
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.
USA (TL) | |
| Miyawaki et al. (2022) +2 other references |
| Collected by and in the collection of ... |
Summit group, Cookes Peak Mining District, Luna County, New Mexico, USA