Machatschkiite
A valid IMA mineral species
This page is currently not sponsored. Click here to sponsor this page.
About Machatschkiite
Felix Machatschki
Formula:
(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O
Colour:
Colorless
Hardness:
2 - 3
Specific Gravity:
2.5 - 2.6
Crystal System:
Trigonal
Name:
Honors Felix Karl Ludwig Machatschki (22 September 1895, Arnfels, Styria, Austria – 17 February 1970), Professor of Mineralogy, University of Vienna, Vienna, Austria.
Rare example of a mineral with arsenate and phosphate anions on separate structural positions (i.e., not substituting for each other). Second such mineral is epifanovite, while the third is walentaite.
Unique Identifiers
Mindat ID:
2510
Long-form identifier:
mindat:1:1:2510:8
IMA Classification of Machatschkiite
Approved
IMA Formula:
Ca6(As5+O4)(As5+O3OH)3(PO4)(H2O)12·3H2O
Approval year:
1976
First published:
1977
Classification of Machatschkiite
8.CJ.35
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
8 : PHOSPHATES, ARSENATES, VANADATES
C : Phosphates without additional anions, with H2O
J : With only large cations
39.3.8.1
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
39 : HYDRATED ACID PHOSPHATES,ARSENATES AND VANADATES
3 : Miscellaneous
22.3.3
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
22 : Phosphates, Arsenates or Vanadates with other Anions
3 : Phosphates, arsenates or vanadates with sulphates
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 |
|---|---|---|
| Mct | 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 Machatschkiite
Transparency:
Transparent, Translucent
Colour:
Colorless
Hardness:
2 - 3 on Mohs scale
Cleavage:
None Observed
Fracture:
Conchoidal
Density:
2.5 - 2.6 g/cm3 (Measured) 2.594 g/cm3 (Calculated)
Optical Data of Machatschkiite
Type:
Uniaxial (-)
RI values:
nω = 1.593(2) nε = 1.585(2)
Max. Birefringence:
δ = 0.008
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:
Moderate
Chemistry of Machatschkiite
Mindat Formula:
(Ca,Na)6(AsO4)(HAsO4)3(PO4,SO4) · 15H2O
Element Weights:
Crystallography of Machatschkiite
Crystal System:
Trigonal
Class (H-M):
3m - Ditrigonal Pyramidal
Space Group:
R3c
Cell Parameters:
a = 15.127(2) Å, c = 22.471(3) Å
Ratio:
a:c = 1 : 1.485
Unit Cell V:
4,453.06 ų (Calculated from Unit Cell)
Z:
6
Morphology:
Pseudorhombohedral crystals, {1011} with minor {1012}.
Crystal Structure
Load
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Unit Cell | Unit Cell Packed
2x2x2 | 3x3x3 | 4x4x4
Show
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Big Balls | Small Balls | Just Balls | Spacefill
Polyhedra Off | Si Polyhedra | All Polyhedra
Remove metal-metal sticks
Display Options
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
Black Background | White Background
Perspective On | Perspective Off
2D | Stereo | Red-Blue | Red-Cyan
View
CIF File Best | x | y | z | a | b | c
CIF File Best | x | y | z | a | b | c
Rotation
Stop | Start
Stop | Start
Labels
Console Off | On | Grey | Yellow
Console Off | On | Grey | Yellow
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) |
|---|---|---|---|---|---|---|---|
| 0015688 | Machatschkiite | Effenberger H, Mereiter K, Pimminger M, Zemann J (1982) Machatschkiite: Crystal structure and revision of the chemical formula Tschermaks Mineralogische und Petrographische Mitteilungen 30 145-155 | 1982 | "Grube Anton" Heubachtal, Schiltach, Black Forest, Germany | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 8.59 Å | (10) |
| 5.34 Å | (8) |
| 3.59 Å | (8) |
| 2.86 Å | (8) |
| 2.83 Å | (8) |
| 2.70 Å | (8) |
| 2.67 Å | (8) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 7: Great Oxidation Event | <2.4 |
| 47a : [Near-surface hydration of prior minerals] | |
| 47c : [Carbonates, phosphates, borates, nitrates] | |
| 47d : [Arsenates, antimonates, selenates, bismuthinates] |
Type Occurrence of Machatschkiite
General Appearance of Type Material:
crusts of subparallel pseudorhombohedral crystals,
Place of Conservation of Type Material:
National Museum of Natural History, Washington, D.C., USA, 137412.
Associated Minerals at Type Locality:
Synonyms of Machatschkiite
Other Language Names for Machatschkiite
Related Minerals - Strunz-mindat Grouping
| 8.CJ. | Airdite | Sr(V4+O)2(PO4)2 · 4H2O |
| 8.CJ. | Dobšináite | Ca2Ca(AsO4)2 · 2H2O |
| 8.CJ. | Sainfeldite | Ca5(AsO4)2(AsO3OH)2 · 4H2O |
| 8.CJ. | Caesiumpharmacosiderite | CsFe3+4[(AsO4)3(OH)4] · 4H2O |
| 8.CJ. | Jeankempite | Ca5(AsO4)2(HAsO4)2 · 7H2O |
| 8.CJ.05 | Stercorite | (NH4)Na(PO3OH) · 4H2O |
| 8.CJ.10 | Swaknoite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.10 | Mundrabillaite | (NH4)2Ca(PO3OH)2 · H2O |
| 8.CJ.15 | Nabaphite | NaBaPO4 · 9H2O |
| 8.CJ.15 | Nastrophite | Na(Sr,Ba)PO4 · 9H2O |
| 8.CJ.20 | Haidingerite | CaHAsO4 · H2O |
| 8.CJ.25 | Rhabdophane-(Y) | YPO4 · H2O |
| 8.CJ.25 | Vladimirite | Ca4(AsO4)2(AsO3OH) · 4H2O |
| 8.CJ.27 | 'Churchite-(Dy)' | (Dy,Sm,Gd,Nd)PO4 · 2H2O |
| 8.CJ.30 | Ferrarisite | Ca5(AsO4)2(HAsO4)2 · 9H2O |
| 8.CJ.35 | Fulbrightite | Ca(V4+O)2(As5+O4)2 · 4H2O |
| 8.CJ.40 | Rauenthalite | Ca3(AsO4)2 · 10H2O |
| 8.CJ.40 | Phaunouxite | Ca3(AsO4)2 · 11H2O |
| 8.CJ.45 | Brockite | (Ca,Th,Ce)PO4 · H2O |
| 8.CJ.45 | Smirnovskite | (Th,Ca)PO4 · nH2O |
| 8.CJ.45 | Rhabdophane-(Ce) | Ce(PO4) · 0.6H2O |
| 8.CJ.45 | Rhabdophane-(La) | La(PO4) · H2O |
| 8.CJ.45 | Rhabdophane-(Nd) | Nd(PO4) · H2O |
| 8.CJ.45 | Tristramite | (Ca,U4+,Fe3+)(PO4,SO4) · 2H2O |
| 8.CJ.45 | Grayite | (Th,Pb,Ca)(PO4) · H2O |
| 8.CJ.45 | Štěpite | U(AsO3OH)2 · 4H2O |
| 8.CJ.47 | Vysokýite | U4+[AsO2(OH)2]4 · 4H2O |
| 8.CJ.50 | Churchite-(Y) | Y(PO4) · 2H2O |
| 8.CJ.50 | Brushite | Ca(PO3OH) · 2H2O |
| 8.CJ.50 | Ardealite | Ca2(PO3OH)(SO4) · 4H2O |
| 8.CJ.50 | Pharmacolite | Ca(HAsO4) · 2H2O |
| 8.CJ.50 | 'Churchite-(Nd)' | Nd(PO4) · 2H2O |
| 8.CJ.55 | Mcnearite | NaCa5(AsO4)(HAsO4)4 · 4H2O |
| 8.CJ.60 | Dorfmanite | Na2(PO3OH) · 2H2O |
| 8.CJ.65 | Sincosite | Ca(V4+O)2(PO4)2 · 4H2O |
| 8.CJ.65 | Bariosincosite | Ba(V4+O)2(PO4)2 · 4H2O |
| 8.CJ.70 | Catalanoite | Na2(PO3OH) · 8H2O |
| 8.CJ.75 | Guérinite | Ca6(HAsO4)3(AsO4)2 · 10.5H2O |
| 8.CJ.85 | Ningyoite | (U,Ca,Ce)2(PO4)2 · 1-2H2O |
Other Information
Notes:
Ready dissolves in dilute HCl or HNO3.
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 Machatschkiite
mindat.org URL:
https://www.mindat.org/min-2510.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 Machatschkiite
Reference List:
Walenta, K. (1977) Machatschkiit, ein neues Arsenatmineral aus der Grube Anton im Heubachtal bei Schiltach (Schwarzwald, Bundesrepublik Deutschland). TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 24 (3). 125-132 doi:10.1007/bf01158190
Fleischer, Michael, Cabri, Louis J., Pabst, and Adolf (1977) New mineral names. American Mineralogist, 62 (11-12) 1259-1262
Walenta, K. (1977) Machatschkiit, ein neues Arsenatmineral aus der Grube Anton im Heubachtal bei Schiltach (Schwarzwald, Bundesrepublik Deutschland). TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 24 (3). 125-132 doi:10.1007/bf01158190
Effenberger, Herta, Mereiter, K., Pimminger, M., Zemann, J. (1982) Machatschkiite: Crystal structure and revision of the chemical formula. TMPM Tschermaks Mineralogische und Petrographische Mitteilungen, 30 (3). 145-155 doi:10.1007/bf01082326
Localities for Machatschkiite
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.
Germany (TL) | |
| Tscherm.Min.Petr.Mitt. (1977) |
Quick NavTopAbout MachatschkiiteUnique IdentifiersIMA Classification Classification Mineral SymbolsPhysical Properties Optical Data Chemistry Crystallography Crystal StructureX-Ray Powder DiffractionGeological EnvironmentType Occurrence SynonymsOther LanguagesStrunz-MindatOther InformationInternet Links References Localities Locality List
Anton Mine, Heubach Valley, Wittichen, Schenkenzell, Rottweil, Freiburg Region, Baden-Württemberg, Germany