Dondoellite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Dondoellite
Don Doell Sr and Jr
Formula:
Ca2Fe(PO4)2 · 2H2O
Colour:
Colorless to pale yellow
Lustre:
Vitreous
Hardness:
3½ - 4
Specific Gravity:
3.14
Crystal System:
Triclinic
Name:
Named after Don Doell Sr. (b. 29 January 1948, Rochester, New York, USA) and Don Doell Jr. (b. 20 July 1982, Montreal, Quebec, Canada), Canadian mineral collectors who provided the first specimens for analysis.
Type Locality:
Dimorph of:
Note: the CNMNC Newsletter reports the type locality as a peak (and not a creek).
"Topologically, the crystal structure of dondoellite can be considered a combination of the collinsite and messelite structures alternating along [001], thus representing a new structure type for minerals with kröhnkite-type chains." (Yang et al., 2022).
"Topologically, the crystal structure of dondoellite can be considered a combination of the collinsite and messelite structures alternating along [001], thus representing a new structure type for minerals with kröhnkite-type chains." (Yang et al., 2022).
Unique Identifiers
Mindat ID:
55598
Long-form identifier:
mindat:1:1:55598:6
GUID
(UUID V4):
(UUID V4):
d58da3b2-c13c-4585-b314-04488f0441a5
IMA Classification of Dondoellite
Classification of Dondoellite
8.CG.
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
G : With large and medium-sized cations, RO4:H2O = 1:1
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 |
|---|---|---|
| Ddl | 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 Dondoellite
Vitreous
Transparency:
Transparent
Colour:
Colorless to pale yellow
Streak:
White
Hardness:
3½ - 4 on Mohs scale
Tenacity:
Brittle
Cleavage:
Perfect
{001}
{001}
Parting:
None
Density:
3.14(5) g/cm3 (Measured) 3.15 g/cm3 (Calculated)
Optical Data of Dondoellite
Type:
Biaxial (+)
RI values:
nα = 1.649(5) nβ = 1.654(5) nγ = 1.672(2)
2V:
Measured: 55° (2), Calculated: 58°
Max Birefringence:
δ = 0.023
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:
Weak, r > v.
Chemistry of Dondoellite
Mindat Formula:
Ca2Fe(PO4)2 · 2H2O
Crystallography of Dondoellite
Crystal System:
Triclinic
Class (H-M):
1 - Pinacoidal
Space Group:
P1
Cell Parameters:
a = 5.4830(2) Å, b = 5.7431(2) Å, c = 13.0107(5) Å
α = 98.772(2)°, β = 96.209(2)°, γ = 108.452(2)°
α = 98.772(2)°, β = 96.209(2)°, γ = 108.452(2)°
Ratio:
a:b:c = 0.955 : 1 : 2.265
Unit Cell V:
378.71 ų (Calculated from Unit Cell)
Z:
2
Morphology:
Spherical aggregates of radiating bladed crystals.
Twinning:
None.
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 6.136 Å | (35) |
| 3.149 Å | (100) |
| 3.023 Å | (63) |
| 2.669 Å | (100) |
| 2.574 Å | (30) |
| 2.628 Å | (26) |
| 1.782 Å | (25) |
| 1.701 Å | (25) |
Comments:
Grizzly Bear Creek, Yukon, Canada. Data from the type description.
Type Occurrence of Dondoellite
General Appearance of Type Material:
Spherical aggregates (diameters up to 2 cm) of radiating bladed crystals. Individual crystals are up to 0.80 x 0.10 x 0.03 mm in size.
Place of Conservation of Type Material:
Mineralogical collections of (1) the University of Arizona Mineral Museum, 1040 E 4th Street, Tucson, AZ 85721-0077, USA, catalogue # 22710 (holotype), and (2) the RRUFF Project, deposition # R210003 (cotype).
Geological Setting of Type Material:
Found in fracture fillings in quartz-phosphate veins cutting a sedimentary iron formation with marine phosphorites and shales. Its formation temperature is estimated to range from 50 to 200 °C.
Associated Minerals at Type Locality:
Synonyms of Dondoellite
Common Associates
Associated Minerals Based on Photo Data:
| 6 photos of Dondoellite associated with Lazulite | MgAl2(PO4)2(OH)2 |
| 3 photos of Dondoellite associated with Quartz | SiO2 |
| 2 photos of Dondoellite associated with Whiteite Subgroup | XM1M22M32(H2O)8(OH)2(PO4)4 |
| 1 photo of Dondoellite associated with Siderite | FeCO3 |
| 1 photo of Dondoellite associated with Whiteite-(CaFeMg) | {Ca}{(Fe2+,Mn2+)}{Mg2}{Al2}(PO4)4(OH)2 · 8H2O |
Related Minerals - Strunz-mindat Grouping
| 8.CG. | Ca-Huréaulite | CaMn5(PO4)4 · 4H2O |
| 8.CG. | Fluckite | CaMn2+(AsO3OH)2 · 2H2O |
| 8.CG. | Alumolukrahnite | Ca[CuAl](AsO4)2(H2O,OH)2 |
| 8.CG.05 | Cassidyite | Ca2Ni(PO4)2 · 2H2O |
| 8.CG.05 | Collinsite | Ca2Mg(PO4)2 · 2H2O |
| 8.CG.05 | Fairfieldite | Ca2Mn2+(PO4)2 · 2H2O |
| 8.CG.05 | Gaitite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.05 | Messelite | Ca2Fe2+(PO4)2 · 2H2O |
| 8.CG.05 | Parabrandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.05 | Anorthoroselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.05 | Talmessite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.05 | Hillite | Ca2Zn(PO4)2 · 2H2O |
| 8.CG.05 | Unnamed (Fe2+-analogue of Parabrandtite) | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.10 | Brandtite | Ca2Mn2+(AsO4)2 · 2H2O |
| 8.CG.10 | Roselite | Ca2Co(AsO4)2 · 2H2O |
| 8.CG.10 | Wendwilsonite | Ca2Mg(AsO4)2 · 2H2O |
| 8.CG.10 | Zincroselite | Ca2Zn(AsO4)2 · 2H2O |
| 8.CG.10 | Rruffite | Ca2Cu(AsO4)2 · 2H2O |
| 8.CG.10 | Unnamed (Fe2+-analogue of Brandtite) | Ca2Fe2+(AsO4)2 · 2H2O |
| 8.CG.15 | Ferrilotharmeyerite | CaZnFe3+(AsO4)2(OH) · H2O |
| 8.CG.15 | Lotharmeyerite | CaZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Mawbyite | PbFe3+2(AsO4)2(OH)2 |
| 8.CG.15 | Mounanaite | PbFe3+2(VO4)2(OH,F)2 |
| 8.CG.15 | Thometzekite | PbCu2+2(AsO4)2 · 2H2O |
| 8.CG.15 | Tsumcorite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.15 | Cobaltlotharmeyerite | CaCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Cabalzarite | CaMg2(AsO4)2 · 2H2O |
| 8.CG.15 | Krettnichite | PbMn3+2(VO4)2(OH)2 |
| 8.CG.15 | Cobalttsumcorite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.15 | Nickellotharmeyerite | CaNi2(AsO4)2 · 2H2O |
| 8.CG.15 | Manganlotharmeyerite | CaMn3+2(AsO4)2(OH)2 |
| 8.CG.15 | Schneebergite | BiCo2(AsO4)2(OH) · H2O |
| 8.CG.15 | Nickelschneebergite | BiNi2(AsO4)2(OH) · H2O |
| 8.CG.15 | Yancowinnaite | PbCuAl(AsO4)2OH · H2O |
| 8.CG.15 | Nickeltsumcorite | Pb(Ni,Fe3+)2(AsO4)2(H2O,OH)2 |
| 8.CG.15 | Magnesiofluckite | CaMg(AsO3OH)2(H2O)2 |
| 8.CG.20 | Gartrellite | PbCuFe3+(AsO4)2(OH) · H2O |
| 8.CG.20 | Helmutwinklerite | PbZn2(AsO4)2 · 2H2O |
| 8.CG.20 | Zincgartrellite | PbZn2(AsO4)2(H2O,OH)2 |
| 8.CG.20 | Rappoldite | PbCo2(AsO4)2 · 2H2O |
| 8.CG.20 | Phosphogartrellite | PbCuFe3+(PO4)2(OH,H2O)2 |
| 8.CG.20 | Lukrahnite | CaCuFe3+(AsO4)2(OH,H2O)2 |
| 8.CG.25 | Pottsite | (Pb3xBi4-2x)(VO4)4 · H2O (0.8 < x < 1.0) |
| 8.CG.25 | Armellinoite-(Ce) | Ca4Ce4+(AsO4)4 · H2O |
| 8.CG.35 | Nickeltalmessite | Ca2Ni(AsO4)2 · 2H2O |
| 8.CG.55 | Irhtemite | Ca4Mg(AsO4)2(HAsO4)2 · 4H2O |
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 Dondoellite
mindat.org URL:
https://www.mindat.org/min-55598.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 Dondoellite
Reference List:
Miyawaki, Ritsuro, Hatert, Frédéric, Pasero, Marco, Mills, Stuart J. (2021) IMA Commission on New Minerals, Nomenclature and Classification (CNMNC) CNMNC Newsletter No 63. Mineralogical Magazine, 85 (6) 910-915 doi:10.1180/mgm.2021.74
Localities for Dondoellite
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.
Canada (TL) | |
| Miyawaki et al. (2021) +1 other reference |
| Collection of Eddy Vervloet | |
Germany | |
| - (n.d.) |
Quick NavTopAbout DondoelliteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography X-Ray Powder DiffractionType Occurrence SynonymsCommon AssociatesStrunz-MindatOther InformationInternet Links References Localities Locality List
Grizzly Bear Creek, Stoneman Camp, Rapid Creek, Dawson mining district, Yukon, Canada