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|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
|Strunz 8th edition ID:||5/C.04-40|
|Nickel-Strunz 10th (pending) edition ID:||5.BF.10|
5 : CARBONATES (NITRATES)
B : Carbonates with additional anions, without H2O
F : With (Cl), SO4, PO4, TeO3
|Dana 8th edition ID:||184.108.40.206|
43 : COMPOUND PHOSPHATES, ETC.
2 : Anhydrous Normal Compound Phosphates, etc·
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Type Occurrence of Crawfordite
|Type Locality:||Koashva quarry, Koashva Mt, Khibiny Massif, Kola Peninsula, Murmanskaja Oblast', Northern Region, Russia|
|Year of Discovery:||1994|
Physical Properties of Crawfordite
Crystallography of Crawfordite
|Cell Parameters:||a = 9.18Å, b = 6.7Å, c = 5.27Å|
β = 89.98°
|Ratio:||a:b:c = 1.37 : 1 : 0.787|
|Unit Cell Volume:||V 324.14 Å³ (Calculated from Unit Cell)|
Optical Data of Crawfordite
|RI values:||nα = 1.520 nβ = 1.564 nγ = 1.565|
|2V:||Measured: 20° , Calculated: 16°|
|Maximum Birefringence:||δ = 0.045|
Chart shows birefringence interference colour range (at 30µm thickness) and does not take into account mineral colouration.
Chemical Properties of Crawfordite
|Simplified for copy/paste:||Na3Sr(CO3)(PO4)|
|Essential elements:||C, Na, O, P, Sr|
|All elements listed in formula:||C, Na, O, P, Sr|
Relationship of Crawfordite to other Species
|Related Minerals - Nickel-Strunz Grouping):|
Other Names for Crawfordite
|Health Warning:||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
New Minerals (1997), New Minerals 1990-1994.
Zapiski Vserossiyskogo Mineralogicheskogo Obshchestva: 123(3): 107-111.
Internet Links for Crawfordite
Localities for Crawfordite
The map shows a selection of localities that have latitude and longitude coordinates recorded. Click on the symbol to view information about a locality. The symbol next to localities in the list can be used to jump to that position on the map.
(TL) indicates type locality. ? indicates mineral may be doubtful at this locality. All other localities listed without reference should be considered as uncertain and unproven until references can be found.
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