Tilasite
A valid IMA mineral species - grandfathered
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About Tilasite
Daniel Tilas
Formula:
CaMg(AsO4)F
Colour:
Light gray, violet-gray, pinkish red (LĂ„ngban); olive-green, apple-green (India); colourless or pale green in transmitted light.
Lustre:
Vitreous, Resinous
Hardness:
5
Specific Gravity:
3.77
Crystal System:
Monoclinic
Member of:
Name:
Named in 1895 by Stens Anders Hjalmar Sjögren in honor of Daniel Tilas [March 2, 1712 Gammelbo, Ramsbergs parish, VÀstmanland, Sweden - October 27, 1772 Stockholm, Sweden], polymath, geologist, mining engineer, vicar of Hammar, director of mines, and regional governor. He was the vice commissioner of the Sweden-Norway Boundary Commission. In 1742, Tilas anticipated aspects of later glacial theories by suggesting that drifting sea ice could be responsible for the distribution of erratic boulders on land. Tilas' grandfather was Urban HjÀrne who was a physician and noted chemist and who was also director of the Swedish Chemical Laboratory, president of the Collegium Medicum (medical college), and president of the Board of Mines.
Tilasite Group. Durangite-Tilasite Series, Maxwellite-Tilasite Series.
The As analogue of reznitskyite.
Tilasite-isokite series is known from the Tolbachik volcano.
The As analogue of reznitskyite.
Tilasite-isokite series is known from the Tolbachik volcano.
Unique Identifiers
Mindat ID:
3962
Long-form identifier:
mindat:1:1:3962:4
GUID
(UUID V4):
(UUID V4):
4915ab86-fca2-46ae-9948-2eb115a286ed
IMA Classification of Tilasite
Approved, 'Grandfathered' (first described prior to 1959)
First published:
1895
Classification of Tilasite
8.BB.
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
8 : PHOSPHATES, ARSENATES, VANADATES
B : Phosphates, etc., with additional anions, without H2O
B : With only medium-sized cations, (OH, etc.):RO4 about 1:1
41.5.6.1
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
41 : ANHYDROUS PHOSPHATES, ETC.CONTAINING HYDROXYL OR HALOGEN
5 : (AB)2(XO4)Zq
22.1.29
22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
22 : Phosphates, Arsenates or Vanadates with other Anions
1 : Phosphates, arsenates or vanadates with fluoride
Mineral Symbols
As of 2021 there are now IMAâCNMNC approved mineral symbols (abbreviations) for each mineral species, useful for tables and diagrams.
| Symbol | Source | Reference |
|---|---|---|
| Til | IMAâCNMNC | Warr, L.N. (2021). IMAâCNMNC approved mineral symbols. Mineralogical Magazine, 85(3), 291-320. doi:10.1180/mgm.2021.43 |
Physical Properties of Tilasite
Vitreous, Resinous
Transparency:
Translucent
Comment:
vitreous on cleavages
Colour:
Light gray, violet-gray, pinkish red (LĂ„ngban); olive-green, apple-green (India); colourless or pale green in transmitted light.
Streak:
white
Hardness:
5 on Mohs scale
Cleavage:
Distinct/Good
On {101}, good.
On {101}, good.
Parting:
On {133}, {102}, and on {011}
Density:
3.77(2) g/cm3 (Measured) 3.80 g/cm3 (Calculated)
Optical Data of Tilasite
Type:
Biaxial (-)
RI values:
nα = 1.640 nβ = 1.660 nγ = 1.675
2V:
Measured: 82°
Max Birefringence:
δ = 0.035
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
Optical Extinction:
Z = b; X ⧠c â 30°.
Chemistry of Tilasite
Mindat Formula:
CaMg(AsO4)F
Crystallography of Tilasite
Crystal System:
Monoclinic
Cell Parameters:
a = 6.691(10) Å, b = 8.947(3) Å, c = 7.563(10) Å
β = 121°
β = 121°
Ratio:
a:b:c = 0.748 : 1 : 0.845
Unit Cell V:
388.09 Ă
Âł (Calculated from Unit Cell)
Z:
4
Morphology:
Crystals equant, may be elongated along [100], flattened on {010}, with complex domatic form development, to 3.5 cm; in subparallel groups, granular, in veinlets, massive.
Twinning:
On {001}, common as symmetrical contact twins.
Comment:
Point Group: 2/m or m; Space Group: C2/c or Cc.
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) |
|---|---|---|---|---|---|---|---|
| 0000298 | Tilasite | Bladh K W, Corbett R K, McLean W J, Laughon R B (1972) The crystal structure of tilasite American Mineralogist 57 1880-1884 |  | 1972 | 0 | 293 | |
| 0014869 | Tilasite | Bermanec V (1994) Centro-symmetric tilasite from Nezilovo, Macedonia: a crystal structure refinement Neues Jahrbuch fur Mineralogie, Monatshefte 1994 289-294 | 1994 | Nezilovo, Macedonia | 0 | 293 |
CIF Raw Data - click here to close
X-Ray Powder Diffraction
Image Loading
Radiation - Copper Kα
Data courtesy of RRUFF project at University of Arizona, used with permission.
Powder Diffraction Data:
| d-spacing | Intensity |
|---|---|
| 5.09 Ă | (40) |
| 4.83 Ă | (60) |
| 4.49 Ă | (60) |
| 3.70 Ă | (60) |
| 3.49 Ă | (60) |
| 3.26 Ă | (100) |
| 3.07 Ă | (100) |
| 2.86 Ă | (70) |
| 2.69 Ă | (100) |
| 2.63 Ă | (70) |
| 2.34 Ă | (70) |
| 2.27 Ă | (80) |
| 1.74 Ă | (90) |
Geological Environment
Paragenetic Mode(s):
| Paragenetic Mode | Earliest Age (Ga) |
|---|---|
| Stage 4a: Earthâs earliest continental crust | >4.4-3.0 |
| 20 : Acidic volcanic rocks | |
| High-đ alteration and/or metamorphism | |
| 32 : Ba/Mn/Pb/Zn deposits, including metamorphic deposits | |
| Stage 7: Great Oxidation Event | <2.4 |
| 45a : [Sulfates, arsenates, selenates, antimonates] | |
| 45b : [Other oxidized fumarolic minerals] |
Type Occurrence of Tilasite
General Appearance of Type Material:
Grains or veinlets in dolomitic limestone bearing hausmannite.
Reference:
Sjögren, H. (1895) PreliminÀra meddelanden om nÄgra undersökningar pÄ svenska mineral. 4. Tilasit eller fluor-adelit frÄn LÄngban. Geologiska Föreningens i Stockholm Förhandlingar: 17: 291-294.
Synonyms of Tilasite
Other Language Names for Tilasite
German:Tilasit
Russian:йОлазОŃ
Simplified Chinese:æ°ç ·ééçł
Spanish:Tilasita
Traditional Chinese:æ°ç ·éŁéçł
Relationship of Tilasite to other Species
Member of:
Other Members of this group:
| Arsenatrotitanite | NaTi(AsO4)O | Mon. 2/m : B2/b |
| Durangite | NaAl(AsO4)F | Mon. 2/m : B2/b |
| Isokite | CaMg(PO4)F | Mon. 2/m : B2/b |
| Kononovite | NaMg(SO4)F | Mon. 2/m : B2/b |
| Lacroixite | NaAl(PO4)F | Mon. 2/m : B2/b |
| Maxwellite | NaFe3+(AsO4)F | Mon. 2/m : P2/m |
| Panasqueiraite | CaMg(PO4)(OH,F) | Mon. |
| Reznitskyite | CaMg(VO4)F | Mon. 2/m : B2/b |
| Tilasite-Isokite Series |
Forms a series with:
Common Associates
Associated Minerals Based on Photo Data:
| 31 photos of Tilasite associated with Svabite | Ca5(AsO4)3F |
| 16 photos of Tilasite associated with Hematite | Fe2O3 |
| 10 photos of Tilasite associated with Barylite | Be2Ba(Si2O7) |
| 9 photos of Tilasite associated with Calcite | CaCO3 |
| 6 photos of Tilasite associated with Friedelite | Mn2+8Si6O15(OH,Cl)10 |
| 5 photos of Tilasite associated with Baryte | BaSO4 |
| 5 photos of Tilasite associated with Roméite Group | A2(Sb5+)2O6Z |
| 5 photos of Tilasite associated with Bergslagite | CaBeAsO4(OH) |
| 5 photos of Tilasite associated with Kutnohorite | CaMn2+(CO3)2 |
| 4 photos of Tilasite associated with Montmorillonite | (Na,Ca)0.33(Al,Mg)2(Si4O10)(OH)2 · nH2O |
Related Minerals - Strunz-mindat Grouping
| 8.BB.X | Arsenowagnerite | Mg2(AsO4)F |
| 8.BB. | Moabite | NiFe3+(PO4)O |
| 8.BB. | Karlditmarite | Cu9O4(PO4)2(SO4)2 |
| 8.BB. | Milkovoite | Cu4O(PO4)(AsO4) |
| 8.BB. | Paulgrothite | Cu9Fe3+O4(PO4)4Cl3 |
| 8.BB.05 | Amblygonite | LiAl(PO4)F |
| 8.BB.05 | Montebrasite | LiAl(PO4)(OH) |
| 8.BB.05 | Tavorite | LiFe3+(PO4)(OH) |
| 8.BB.10 | Triplite | Mn2+2(PO4)F |
| 8.BB.10 | Zwieselite | Fe2+2(PO4)F |
| 8.BB.15 | Sarkinite | Mn2+2(AsO4)(OH) |
| 8.BB.15 | Triploidite | Mn2+2(PO4)(OH) |
| 8.BB.15 | Wagnerite | (Mg,Fe2+)2(PO4)F |
| 8.BB.15 | Wolfeite | Fe2+2(PO4)(OH) |
| 8.BB.15 | StanÄkite | (Mn2+,Fe2+,Mg)Fe3+(PO4)O |
| 8.BB.15 | Joosteite | Mn2+(Mn3+,Fe3+)(PO4)O |
| 8.BB.15 | Hydroxylwagnerite | Mg2(PO4)(OH) |
| 8.BB.15 | Unnamed (Sb-analogue of Auriacusite) | Fe3+Cu2+[(Sb,As)O4]O |
| 8.BB.20 | Holtedahlite | Mg2(PO4)(OH) |
| 8.BB.20 | Satterlyite | (Fe2+,Mg,Fe)12(PO4)5(PO3OH)(OH,O)6 |
| 8.BB.25 | Althausite | Mg4(PO4)2(OH,O)(F,â») |
| 8.BB.30 | Adamite | Zn2(AsO4)(OH) |
| 8.BB.30 | Eveite | Mn2+2(AsO4)(OH) |
| 8.BB.30 | Libethenite | Cu2(PO4)(OH) |
| 8.BB.30 | Olivenite | Cu2(AsO4)(OH) |
| 8.BB.30 | Zincolibethenite | CuZn(PO4)(OH) |
| 8.BB.30 | Zincolivenite | CuZn(AsO4)(OH) |
| 8.BB.30 | Auriacusite | Fe3+Cu2+(AsO4)O |
| 8.BB.35 | Paradamite | Zn2(AsO4)(OH) |
| 8.BB.35 | Tarbuttite | Zn2(PO4)(OH) |
| 8.BB.40 | Barbosalite | Fe2+Fe3+2(PO4)2(OH)2 |
| 8.BB.40 | Hentschelite | CuFe3+2(PO4)2(OH)2 |
| 8.BB.40 | Lazulite | MgAl2(PO4)2(OH)2 |
| 8.BB.40 | Scorzalite | Fe2+Al2(PO4)2(OH)2 |
| 8.BB.40 | Wilhelmkleinite | ZnFe3+2(AsO4)2(OH)2 |
| 8.BB.45 | Trolleite | Al4(PO4)3(OH)3 |
| 8.BB.45 | Yaroshevskite | Cu9O2(VO4)4Cl2 |
| 8.BB.45 | Dokuchaevite | Cu8O2(VO4)3Cl3 |
| 8.BB.50 | Namibite | Cu(BiO)2(VO4)(OH) |
| 8.BB.50 | Aleutite | [Cu5O2](AsO4)(VO4) · (Cu,K,Pb,Rb,Cs,)Cl |
| 8.BB.52a | Ericlaxmanite | Cu4O(AsO4)2 |
| 8.BB.52b | Kozyrevskite | Cu4O(AsO4)2 |
| 8.BB.55 | Phosphoellenbergerite | (Mg,â»)2Mg12(PO4,PO3OH)6(PO3OH,CO3)2(OH)6 |
| 8.BB.55 | Popovite | Cu5O2(AsO4)2 |
| 8.BB.60 | Urusovite | CuAl(AsO4)O |
| 8.BB.65 | Theoparacelsite | Cu3(As2O7)(OH)2 |
| 8.BB.70 | Turanite | Cu5(VO4)2(OH)4 |
| 8.BB.75 | Stoiberite | Cu5(VO4)2O2 |
| 8.BB.80 | Fingerite | Cu11(VO4)6O2 |
| 8.BB.85 | Averievite | Cu6(VO4)2O2Cl2 |
| 8.BB.90 | Lipscombite | Fe2+Fe3+2(PO4)2(OH)2 |
| 8.BB.90 | Richellite | CaFe3+2(PO4)2(OH,F)2 |
| 8.BB.90 | Zinclipscombite | ZnFe3+2(PO4)2(OH)2 |
Fluorescence of Tilasite
May fluoresce pale yellow (ex. Stirling Hill), pale pinkish orange (ex. Stirling Hill), orange (ex. Langban), or dark red (ex. Langban) under SW UV. Also yellow-orange under LW UV (ex. Sterling Mine).
Other Information
Electrical:
Piezoelectric
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 Tilasite
mindat.org URL:
https://www.mindat.org/min-3962.html
Please feel free to link to this page.
Please feel free to link to this page.
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External Links:
References for Tilasite
Reference List:
forum.amiminerals.it (n.d.) http://forum.amiminerals.it/viewtopic.php?f=5&t=18081&sid=7d8b1ed865c3dde7afc6276b9d04529f
Sjögren, Hj. (1895) PreliminÀra meddelanden om nÄgra undersökningar pÄ svenska mineral. Geologiska Föreningen i Stockholm Förhandlingar, 17 (3) 267-318 doi:10.1080/11035899509442303
Richmond, Wallace E. (1940) Crystal chemistry of the phosphates, arsenates and vanadates of the type A2XO4(Z) American Mineralogist, 25 (7) 441-479
JanÄev, Simeon (1997) Zn-rich pyroxenes from the ore occurences in the mixed series in the upper part of the Babuna River, Macedonia. Geologija, 40. 283-289 doi:10.5474/geologija.1997.013
Localities for Tilasite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
â - 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.
Algeria | |
| Heflik (1989) +1 other reference |
Australia | |
| Elliott (1991) |
Austria | |
| Kolitsch et al. (2021) |
| Kolitsch et al. (2019) |
| BRANDSTĂTTER et al. (2015) | |
| Kolitsch et al. (2018) |
| Schachinger et al. (2016) |
Germany | |
| Fusswinkel et al. (2013) |
India | |
| Palache et al. (1951) +1 other reference |
Italy | |
| Piccoli et al. (2007) |
| Castellaro et al. (2021) |
| Balestra et al. (2009) |
| CĂĄmara et al. (2014) +2 other references |
| Kolitsch et al. (2011) |
| Graeser S et al. (Valle devero-Ossola) |
| Albertini C. (1991) +2 other references | |
Kazakhstan | |
| Vereshchagin et al. (2019) |
Namibia | |
| NHM (London) |
North Macedonia | |
| Neues Jahrbuch fĂŒr Mineralogie (1994) +1 other reference |
| Ermolaeva et al. (2017) +1 other reference |
| Chukanov et al. (2015) | |
| Ermolaeva et al. (2019) | |
Russia | |
| Vera N. Smol'yaninova data |
| Pekov et al. (2014) +3 other references |
| Kasatkin et al. (2018) +1 other reference |
Spain | |
| Rewitzer et al. (2018) |
Sweden | |
| Holtstam (2001) |
| Rocks & Min.: 60:243 +2 other references |
| Langhof (2003) +1 other reference | |
| Blatter (2003) |
| Holtstam et al. (1998) |
| Nysten (2004) |
| Nysten (2020) |
Switzerland | |
| Mineralogical Record: 32: 211. +1 other reference |
| Brugger et al. (1999) +2 other references |
| |
| Stalder et al. (1998) | |
USA | |
| Anthony et al. (1995) |
| Anthony et al. (1995) | |
| Williams (1970b) +2 other references | |
| Anthony Kamps |
| Parker (1978) +1 other reference |
| Northrop et al. (1996) |
| Northrop et al. (1996) |
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Fuchs Quarry, Hartkoppe, Sailauf, Aschaffenburg District, Lower Franconia, Bavaria, Germany