Crawfordite
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About Crawfordite
Formula:
Na3Sr(CO3)(PO4)
Colour:
Colourless
Lustre:
Vitreous
Hardness:
3
Crystal System:
Monoclinic
Name:
Named in 1994 by Alexander Petrovich Khomyakov, L. I. Polezhaeva, and E. V. Sokolova in honor of Sir Adair Crawford [1748 Crumlin, County Antrim, Northern Ireland, United Kingdom - July 29, 1795 Lymington, England, United Kingdom] professor of chemistry at the Royal Military Academy, London, England as well as a staff physician at St. Thomas Hospital, also in London. He researched and made many contributions to calorimetry and specific heats. He was co-discoverer of strontium.
Found in hyperagpaitic pegmatites
Classification of Crawfordite
Approved
5/C.04-40
5.BF.10
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
43.2.1.4
43 : COMPOUND PHOSPHATES, ETC.
2 : Anhydrous Normal Compound Phosphates, etc·
43 : COMPOUND PHOSPHATES, ETC.
2 : Anhydrous Normal Compound Phosphates, etc·
Pronounciation of Crawfordite
Pronounciation:
| Play | Recorded by | Country |
|---|---|---|
| Jolyon & Katya Ralph | United Kingdom |
Physical Properties of Crawfordite
Optical Data of Crawfordite
Type:
Biaxial (-)
RI values:
nα = 1.520 nβ = 1.564 nγ = 1.565
2V:
Measured: 20° , Calculated: 16°
Max Birefringence:
δ = 0.045
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:
Low
Dispersion:
not discernible
Chemical Properties of Crawfordite
Formula:
Na3Sr(CO3)(PO4)
IMA Formula:
Na3Sr(PO4)(CO3)
Crystallography of Crawfordite
Crystal System:
Monoclinic
Cell Parameters:
a = 9.18 Å, b = 6.7 Å, c = 5.27 Å
β = 89.98°
β = 89.98°
Ratio:
a:b:c = 1.37 : 1 : 0.787
Unit Cell V:
324.14 ų (Calculated from Unit Cell)
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) |
|---|---|---|---|---|---|---|---|
| 0012486 | Crawfordite | Sokolova E V, Khomyakov A P (1992) Crystal structure of a new mineral Na3SePO4CO3 from bredleyite group Doklady Akademii Nauk SSSR 322 531-535 | 1992 | 0 | 293 |
CIF Raw Data - click here to close
Type Occurrence of Crawfordite
Synonyms of Crawfordite
Other Language Names for Crawfordite
Common Associates
Associated Minerals Based on Photo Data:
Related Minerals - Nickel-Strunz Grouping
| 5.BF.05 | Ferrotychite | Na6(Fe,Mn,Mg)2(CO3)4(SO4) | Iso. m3 (2/m 3) : Fd3 |
| 5.BF.05 | Manganotychite | Na6Mn2(CO3)4(SO4) | Iso. m3 (2/m 3) : Fd3 |
| 5.BF.05 | Northupite | Na3Mg(CO3)2Cl | Iso. m3 (2/m 3) : Fd3 |
| 5.BF.05 | Tychite | Na6Mg2(CO3)4(SO4) | Iso. m3 (2/m 3) : Fd3 |
| 5.BF.10 | Bonshtedtite | Na3Fe2+(CO3)(PO4) | Mon. 2/m : P21/m |
| 5.BF.10 | Bradleyite | Na3Mg(CO3)(PO4) | Mon. |
| 5.BF.10 | Sidorenkite | Na3Mn2+(CO3)(PO4) | Mon. |
| 5.BF.15 | Daqingshanite-(Ce) | (Sr,Ca,Ba)3(Ce,La)(CO3)3-x(PO4)(OH,F)2x | Trig. |
| 5.BF.20 | Reederite-(Y) | (Na,Mn)15Y2(CO3)9(FSO3)Cl | Hex. 6 : P6 |
| 5.BF.25 | Mineevite-(Y) | Na25Ba(Y,Gd,Dy)2(CO3)11(HCO3)4(SO4)2F2Cl | Hex. 6/m : P63/m |
| 5.BF.30 | Brianyoungite | Zn3(CO3,SO4)(OH)4 | Mon. 2/m : P21/m |
| 5.BF.35 | Philolithite | Pb12Mn2+(Mg,Mn2+)2(Mn2+,Mg)4(CO3)4(SO4)O6(OH)12Cl4 | Tet. 4/mmm (4/m 2/m 2/m) |
| 5.BF.40 | Leadhillite | Pb4(CO3)2(SO4)(OH)2 | Mon. 2/m : P21/b |
| 5.BF.40 | Macphersonite | Pb4(CO3)2(SO4)(OH)2 | Orth. mmm (2/m 2/m 2/m) |
| 5.BF.40 | Susannite | Pb4(CO3)2(SO4)(OH)2 | Trig. 3 : P3 |
Related Minerals - Dana Grouping (8th Ed.)
| 43.2.1.1 | Bradleyite | Na3Mg(CO3)(PO4) | Mon. |
| 43.2.1.2 | Sidorenkite | Na3Mn2+(CO3)(PO4) | Mon. |
| 43.2.1.3 | Bonshtedtite | Na3Fe2+(CO3)(PO4) | Mon. 2/m : P21/m |
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.
References for Crawfordite
Reference List:
Sort by Year (asc) | by Year (desc) | by Author (A-Z) | by Author (Z-A)
New Minerals (1997), New Minerals 1990-1994.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 123(3): 107-111.
Internet Links for Crawfordite
mindat.org URL:
https://www.mindat.org/min-1148.html
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Localities for Crawfordite
symbol to view information about a locality.
The Locality List
- This locality has map coordinates listed.
- This locality has estimated coordinates.
ⓘ - Click for 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.
Russia (TL) | |
| [MinRec 27:202]; Pekov, I. (1998) Minerals First discovered on the territory of the former Soviet Union 369p. Ocean Pictures, Moscow |
Koashva Open Pit, Koashva Mt, Khibiny Massif, Murmansk Oblast, Russia