Johntomaite
A valid IMA mineral species
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About Johntomaite
Formula:
BaFe2+2Fe3+2(PO4)3(OH)3
Colour:
Greenish black
Lustre:
Sub-Adamantine, Vitreous, Greasy
Hardness:
4½
Specific Gravity:
4.05
Crystal System:
Monoclinic
Member of:
Name:
Named by U. Kolitsch, A. Pring, and E.R.T. Tiekink in honor of John Toma (b. 1954), Australian amateur mineral collector who discovered the mineral.
Unique Identifiers
Mindat ID:
7078
Long-form identifier:
mindat:1:1:7078:8
GUID
(UUID V4):
(UUID V4):
b6382d1a-19a7-452c-b156-5db5ab715c8f
IMA Classification of Johntomaite
Approved
Approval year:
1999
First published:
2000
Classification of Johntomaite
8.BH.20
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
H : With medium-sized and large cations, (OH,etc.):RO4 = 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 |
---|---|---|
Jtm | 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 Johntomaite
Sub-Adamantine, Vitreous, Greasy
Transparency:
Opaque
Colour:
Greenish black
Streak:
Dark grey greenish
Hardness:
4½ on Mohs scale
Hardness Data:
Measured
Tenacity:
Brittle
Cleavage:
Perfect
{100}
{100}
Fracture:
Irregular/Uneven
Density:
4.05 g/cm3 (Measured) 4.084 g/cm3 (Calculated)
Optical Data of Johntomaite
Type:
Biaxial (-)
RI values:
nα = 1.817 nβ = 1.829 nγ = 1.837
2V:
Measured: 80° to 85°, Calculated: 78°
Max Birefringence:
δ = 0.020
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:
Very High
Pleochroism:
Strong
Comments:
X = bluish green
Y = dark brownish green
Z = brownish
Z=b
Y = dark brownish green
Z = brownish
Z=b
Chemistry of Johntomaite
Mindat Formula:
BaFe2+2Fe3+2(PO4)3(OH)3
Crystallography of Johntomaite
Crystal System:
Monoclinic
Class (H-M):
2/m - Prismatic
Space Group:
P21/m
Cell Parameters:
a = 9.199 Å, b = 12.359 Å, c = 5.004 Å
Ratio:
a:b:c = 0.744 : 1 : 0.405
Unit Cell V:
559.9 ų
Z:
2
Morphology:
{001}, {-101}, {021} and {-131}
Twinning:
None observed
Crystal Structure
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Data courtesy of the American Mineralogist Crystal Structure Database. Click on an AMCSD ID to view structure
ID | Species | Reference | Link | Year | Locality | Pressure (GPa) | Temp (K) |
---|---|---|---|---|---|---|---|
0014643 | Johntomaite | Kolitsch U, Pring A, Tiekink E R T (2000) Johntomaite, a new member of the bjarebyite group of barium phosphates: description and structure refinement Mineralogy and Petrology 70 1-14 | 2000 | Spring Creek copper mine, southern Flinders Ranges, South Australia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
d-spacing | Intensity |
---|---|
3.159 Å | (100) |
2.983 Å | (50) |
2.749 Å | (50 broad) |
4.573 940) Å | ( |
3.091 Å | (40) |
Geological Environment
Paragenetic Mode(s):
Paragenetic Mode | Earliest Age (Ga) |
---|---|
Stage 4b: Highly evolved igneous rocks | >3.0 |
34 : Complex granite pegmatites |
Type Occurrence of Johntomaite
General Appearance of Type Material:
Clusters of greenish black monoclinic prisms 0.3 to 1 mm in length.
Place of Conservation of Type Material:
South Australian Museum, Adelaide, South Australia, Australia
Geological Setting of Type Material:
Found on dumps of the Spring Creek copper mine.
Reference:
Kolitsch, U., Pring, A., Tiekink, E.R.T. (2000) Johntomaite, a new member of the bjarbyite group of barium phosphates: description and structure refinement. Mineralogy and Petrology: 70: 1-14.
Synonyms of Johntomaite
Other Language Names for Johntomaite
Relationship of Johntomaite to other Species
Member of:
Other Members of this group:
Bjarebyite | (Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3 | Mon. 2/m : P21/m |
Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 | Mon. 2/m : P21/m |
Penikisite | Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3 | Mon. 2/m : P21/m |
Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
Plumboperloffite | PbMn2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
Strontioperloffite | SrMn2+2Fe3+2(PO4)3(OH)3 | Mon. 2/m : P21/m |
Related Minerals - Strunz-mindat Grouping
8.BH. | Crimsonite | PbFe3+2(PO4)2(OH)2 |
8.BH. | Reznitskyite | CaMg(VO4)F |
8.BH. | Cuprozheshengite | Pb4CuZn2(AsO4)2(PO4)2(OH)2 |
8.BH. | Zheshengite | Pb4ZnZn2(AsO4)2(PO4)2(OH)2 |
8.BH. | Peterchinite | Zn3Zn2(OH)6As[O3(OH)3] |
8.BH.05 | Thadeuite | Ca(Mg,Fe2+)3(PO4)2(OH,F)2 |
8.BH.10 | Durangite | NaAl(AsO4)F |
8.BH.10 | Isokite | CaMg(PO4)F |
8.BH.10 | Lacroixite | NaAl(PO4)F |
8.BH.10 | Maxwellite | NaFe3+(AsO4)F |
8.BH.10 | Panasqueiraite | CaMg(PO4)(OH,F) |
8.BH.10 | Kononovite | NaMg(SO4)F |
8.BH.10 | Arsenatrotitanite | NaTi(AsO4)O |
8.BH.15 | Drugmanite | Pb2(Fe3+,Al)(PO4)(PO3OH)(OH)2 |
8.BH.20 | Bjarebyite | (Ba,Sr)(Mn2+,Fe2+,Mg)2Al2(PO4)3(OH)3 |
8.BH.20 | Cirrolite | Ca3Al2(PO4)3(OH)3 (?) |
8.BH.20 | Kulanite | Ba(Fe2+,Mn2+,Mg)2(Al,Fe3+)2(PO4)3(OH)3 |
8.BH.20 | Penikisite | Ba(Mg,Fe2+,Ca)2Al2(PO4)3(OH)3 |
8.BH.20 | Perloffite | Ba(Mn2+,Fe2+)2Fe3+2(PO4)3(OH)3 |
8.BH.20 | Bjarebyite Group | |
8.BH.20 | Strontioperloffite | SrMn2+2Fe3+2(PO4)3(OH)3 |
8.BH.20 | Plumboperloffite | PbMn2+2Fe3+2(PO4)3(OH)3 |
8.BH.25 | Bertossaite | (Li,Na)2(Ca,Fe2+,Mn2+)Al4(PO4)4(OH,F)4 |
8.BH.25 | Palermoite | (Li,Na)2(Sr,Ca)Al4(PO4)4(OH)4 |
8.BH.25 | Natropalermoite | Na2SrAl4(PO4)4(OH)4 |
8.BH.30 | Carminite | PbFe3+2(AsO4)2(OH)2 |
8.BH.30 | Sewardite | CaFe3+2(AsO4)2(OH)2 |
8.BH.35 | Adelite | CaMg(AsO4)(OH) |
8.BH.35 | Arsendescloizite | PbZn(AsO4)(OH) |
8.BH.35 | Austinite | CaZn(AsO4)(OH) |
8.BH.35 | Cobaltaustinite | CaCo(AsO4)(OH) |
8.BH.35 | Conichalcite | CaCu(AsO4)(OH) |
8.BH.35 | Duftite | PbCu(AsO4)(OH) |
8.BH.35 | Gabrielsonite | PbFe3+(As3+O3)O |
8.BH.35 | Nickelaustinite | CaNi(AsO4)(OH) |
8.BH.35 | Tangeite | CaCu(VO4)(OH) |
8.BH.35 | Duftite-alpha | PbCu(AsO4)(OH) |
8.BH.35 | Gottlobite | CaMg(VO4)(OH) |
8.BH.35 | Hermannroseite | CaCu(PO4)(OH) |
8.BH.40 | Čechite | PbFe2+(VO4)(OH) |
8.BH.40 | Descloizite | PbZn(VO4)(OH) |
8.BH.40 | Mottramite | PbCu(VO4)(OH) |
8.BH.40 | Pyrobelonite | PbMn2+(VO4)(OH) |
8.BH.40 | Khorixasite | (Bi0.67◻0.33)Cu(VO4)(OH) |
8.BH.45 | Bayldonite | PbCu3(AsO4)2(OH)2 |
8.BH.45 | Vésigniéite | BaCu3(VO4)2(OH)2 |
8.BH.50 | Paganoite | NiBi(AsO4)O |
8.BH.55 | Harrisonite | Ca(Fe2+,Mg)6(PO4)2(SiO4)2 |
8.BH.55 | Jagowerite | BaAl2(PO4)2(OH)2 |
8.BH.60 | Attakolite | CaMn2+Al4(SiO3OH)(PO4)3(OH)4 |
8.BH.65 | Leningradite | PbCu3(VO4)2Cl |
8.BH.70 | Katiarsite | KTiO(AsO4) |
8.BH.70 | Yurgensonite | K2SnTiO2(AsO4)2 |
8.BH.75 | Melanarsite | K3Cu7Fe3+O4(AsO4)4 |
8.BH.80 | Moraskoite | Na2Mg(PO4)F |
8.BH.80 | Evseevite | Na2Mg(AsO4)F |
8.BH.85 | Piccoliite | NaCaMn3+2(AsO4)2O(OH) |
Fluorescence of Johntomaite
None observed
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 Johntomaite
mindat.org URL:
https://www.mindat.org/min-7078.html
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References for Johntomaite
Reference List:
Kolitsch, U., Pring, A., Tiekink, E. R. T. (2000) Johntomaite, a new member of the bjarebyite group of barium phosphates: description and structure refinement. Mineralogy and Petrology, 70 (1) 1-14 doi:10.1007/s007100070009
Localities for Johntomaite
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.
Australia (TL) | |
| Kolitsch et al. (2000) |
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Spring Creek Mine, Wilmington, South Flinders Ranges, Flinders Ranges, South Australia, Australia