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Scawtite from
Scawt Hill, Larne, Co. Antrim, Northern Ireland, UK


Locality type:Hill
Classification
Species:Scawtite
Formula:Ca7(Si3O9)2CO3 · 2H2O
Chemical Analyses:
Oxide wt%:
1
CaO46,4 %
SiO234,2 %
CO218,0 %
Total:98 %
Sample references:
1 -
Habit:Tilley & Hey (1930): plates flattened in the plane of the principal cleavage. Frequently these form subparallel or slightly divergent clusters. Owing to mutual interference and intergrowth with the surrounding minerals no well-defined crystals can be isolated. The largest individuals met with do not exceed 1.5 mm. in length.
Colour:colourless with vitreous lustre
Confirmation
Validity:Valid - Type Locality
Associated Minerals Based on Photo Data:
Tobermorite5 photos of Scawtite associated with Tobermorite at this locality.
Spinel4 photos of Scawtite associated with Spinel at this locality.
Gehlenite3 photos of Scawtite associated with Gehlenite at this locality.
Larnite3 photos of Scawtite associated with Larnite at this locality.
Augite1 photo of Scawtite associated with Augite at this locality.
Spurrite1 photo of Scawtite associated with Spurrite at this locality.
Data
Mineral Data:Click here to view Scawtite data
Locality Data:Click here to view Scawt Hill, Larne, Co. Antrim, Northern Ireland, UK
Photo GalleryView Gallery (3 photos)
Data Identifiers
Mindat Occurrence Record ID:106059
Long-form Identifier:1:3:106059:1
GUID (UUID V4):079e3ccd-d92c-4bd2-82a8-e27270bf977f
Nearest other occurrences of Scawtite
14.0km (8.7 miles) Carneal, Glenoe, Larne, Co. Antrim, Northern Ireland, UK
References
Reference Search (possible matching items)
Report (issue)
Scawtite Ca7 Si6 O18(CO3) ² 2H2 O ° c 2001 Mineral Data Publishing, ver sion 1.2 Crystal Data: Monoclinic...California, USA; total Fe as Fe2O 3 : (2) Ballycraigy, Ireland; remainder is trivalent metal oxides. (3) Ca7 Si6...hillebrandite. Distribution: At Scawt Hill and Ballycraigy, near Larne, Co. Antrim, Ireland. On the Zeilberg, near...USA, at Crestmore, Riverside Co., California, and near Neihart, Cascade Co., Montana. From Kushiro, Hiroshima...Name: For the locality where ¯rst found, Scawt Hill, Ireland. Type Material: The Natural History Museum
Journal (article/letter/editorial)
OPTICAL AND X-RAY STUDY OF SCAWTITE FROM BALLYCRAIGY, LARNE, N. IRELAND J. D. C. McCoNNBrr., Department...analysis of scawtite shows that this mineral is a carbonated calcium silicate hydrate. The scawtite examined...examined was collected at Ballycraigy, Larne, N. frehnd, where it occurs in a vesicle in larnite rocks in association...identity of the material from Ballycraigy and scawtite from Scawt Hill was provided by comparing the optical...minerals. The following data were obtained for scawtite from Ballycraigy: O p t i c a l c o n s t a n
Journal (article/letter/editorial)
(2005) THE STRUCTURE OF SPURRITE, TILLEYITE AND SCAWTITE, AND RELATIONSHIPS TO OTHER SILICATE–CARBONATE...Ca5(SiO4)2(CO3), tilleyite, Ca5(Si2O7)(CO3)2, and scawtite, Ca7(Si6O18)(CO3)•2H2O, are the only calcium carbonate–silicate...tilleyite from Cornet Hill, Metaliferi Massif, Apuseni Mountains, Romania, and scawtite from the type locality...locality in Scawt Hill, Ireland, were used to refine the structures to R values of 0.036, 0.021 and 0.018... c 7.572(1) Å,  105.17°, V 1128.3(3) Å3, and scawtite, space group Im, a 6.631(1), b 15.195(3), c 10
Journal (article/letter/editorial)
LARNITE, SCAWTITE, AND HYDROGROSSULAR FROM TOKATOKA, NEW ZEALAND Bnr,q.NMRsoN, The American Museum...inches; (2) larnite, thickness 30 inches; (3) scawtite, thickness 10 inches. other minerals recognized...rock consistingmainly of scawtite.Beyond this scawtite zone is pale grey limestone,seamedwith narrow...quarry a similar sequencewas found, except that the scawtite zone was not observed; it may be present but has...Minnesota; Lab. No. R2214). sio: AlzOs Fe:Os FeO Mso CaO CO: HrO+ HrOP:Ou Tio, MnO (1) (2) 1 7. 4 8 3. 0 1
Report (issue)
Chemistry: SiO2 Al2 O 3 Fe2 O3 FeO MgO CaO Na2 O H2 O+ CO 2 P2 O5 Total (1) 31.00 1.12 trace 0.64 0.69 64...61 0.82 0.32 99.86 100.13 100.00 (1) Scawt Hill, Ireland; minor spurrite impurity. (2) Do.; by electron...perovskite, wollastonite (Scawt Hill, Ireland); rankinite, kilchoanite, scawtite, hydrogrossular (Tokatoka...Israel). Distribution: At Scawt Hill and Ballycraigy, near Larne, Co. Antrim, Ireland. In Scotland, from Camas...USA, at Marble Canyon, Culberson Co., Texas. Name: For Larne, Ireland, in the vicinity of which the mineral
Journal (article/letter/editorial)
SCAWTITE FROM CRESTMORE, CALIFORNIA Josnrn Munoocu, University of Calif ornia at Los Angeles,CaliJornia...CaliJornia. Ansrnlcr An occurrence of scawtite has been discovered in the contact zone at Crestmore, California...habit and mode of occurrence the original find at Scawt Hiil. Crystals are in general poor, but it has been...cell dimensions: oo : 1 0 . 2 2A , aibic bo: co : 1 5 . 4 2A , 0.6628:1:0.4345 A: 6.70 A 100"29'...be scawtite, which has been found in similar crystalline groups only at Scawt Hill, County Antrim, Ireland
Journal (article/letter/editorial)
contains bultfonteinite, scawtite, xonotlite and calcite. Among them, oyelite and scawtite are primarily precipitated...xonotlite are secondarily formed by alteration of scawtite. The thickness of the vein is about 2cm and the...addition to oyelite the vein contains bultfonteinite, scawtite and schorlomite, rankinite, kilchoanite, fukalite...essential from ratio compo- xonotlite. well Scawtite crystallized in this vein is well crystal and...Kitinosuke tobermorite, Henmi bultfonteinite and scawtite from Fuka * Kusachi ** Excluded with et al
Journal (article/letter/editorial)
TILLEYITEAND GEHLENITE-BEARING SKARNS FROM CORNET HILL, APUSENI MOUNTAINS, ROMANIA ŞTEFAN MARINCEA§ AND...tilleyite- and gehlenite-bearing skarns from Cornet Hill, part of the Metaliferi Massif, Apuseni Mountains...parageneses: (1) an early hydrothermal one that includes scawtite, xonotlite and hibschite, (2) a late hydrothermal...tilleyite, hibschite, scawtite, xonotlite, tobermorite, riversideite, plombièrite, Cornet Hill, Romania. SOMMAIRE...paragenèse hydrothermale précoce, qui comprend scawtite, xonotlite et hibschite, (2) une paragenèse hydrothermale
Journal (article/letter/editorial)
Sericite Epidote Pyrrhotite Limonite Magnetite Scawtite Okenite? Vesuvianite, calcite and garnet are...of the rock is characterized by gehlenite and scawtite. The former occurs in large square or rectangular...original composition is quite undistinguishable. The scawtite forms small laths optically positive, a:1.603...alteration of gehlenite, but all the sections yielding scawtite also contained gehlenite' A thin 2 mm. dark-coloured...brown fibrous mineral including small laths of scawtite. The fibrous mineral would not yield any evidence
Journal (article/letter/editorial)
XXll. The dolerite-chal]c contact of Scawt Hill, Co. Antrim. The production of basic alkali-roclcs... Field Occurrence. Scawt Hill, situated six miles n o r t h of Larne, Co. Antrim, forms a prominent height...edge of the Antrim 'plateau basalt' lavas. The geological structure of this portion of Antrim is comparatively...chalk and older Mesozoic rocks is covered by the Antrim Tertiary basalts, which are divisible into a lower...of bauxitic and pisolitic iron-ore deposits. Scawt Hill itself forms a mass of olivine-dolerite breaking
Journal (article/letter/editorial)
38 On scawtite pseudomorphs after spurrite at Scawt Hill, Co. Antrim. By C. E. TILLEY, Ph.D., B.Sc....November 4, 1937.] CAWTITE was first described at Scawt Hill as a secondary mineral occurring in vesicles...hybrid of the endogenous contact-zone. 1 Since then scawtite has been identified in a gehlenite-vesuvianite-ealcite-rock...present note records a further occurrence of scawtite at Scawt Hill in a different patagenesis, viz. in association...discussing the paragenesis of larnite and spurrite at Scawt Hill, 3 reference was made to the instability of larnite
Journal (article/letter/editorial)
222 Scawtite, a new mineral from Scawt Hill, Co. Antrim. By C. E. TILLEY, B.Sc., Ph.D., F.G.S. Lecturer...limestone by the dolerite intrusion at Scawt Hill, Co. Antrim. 1 I t is found particularly in intimate...66, p. 347. C. E. TILLEY ON SCAWTITE, A N E W MINERAL FROM CO. ANTRIM 223 tion of the powder derived...may be brought to FIG. 1. Optical orientation of scawtite lie on this second cleavage, on the plane of symmetry...tests thus indicate the presence of SiO2, OaO, and CO~. In order to obtain sufficient material for analysis
Journal (article/letter/editorial)
a dolerite-chalk contact at Ballycraigy, Larne, County Antrim, a mineral was examined and subsequently...I THE 11"3 ~. HYDRATE :FROM BALLYcRAIGY, LARNE, Co. ANTRIM. This mineral occurs in cavities in contact-rocks...rocks were obtained is similar to t h a t a t Scawt Hill (Tilley, 1931) and was exposed in a t e m p o...mile north of Lame, has no connexion with the Scawt Hill plug, six miles north of Lame. The hydrate mineral...mineral was found in association with the mineral scawtite in vugs in larnite-rocks from the endogenous zone
Journal (article/letter/editorial)
リアEyre半 島 の 先 カ ン ブ リ ア 紀 片麻 岩 に 関 す る もの で,三921年 Irelandの にComrie地 に 発 表 され た 。 そ の 後 はScot 各 地 の 変成...に 転 じた 。 と く 方 に お け る閃 緑 岩 の 接 触 変 成 作 用, Scawt Hillの ド レ ラ イ トーチ ョ ー ク 接 触 帯 に お け る 変域 Kenidjackの...つ,鋭 意 研 究 と教 育 をお しす す め,同 * 北海道大学理学部地質学鉱物学教室 Hill 年 に 亘 っ て 徹 底 的 な研 の新 鉱 物 を scawtitt(7CaO・6SiO2・...初 代 教 授 に任 命 し たの で あ る。 と きに彼 は37才 個 々の造 く にScawt hydrocalumite(4CaO・Al2O3. あつ め,新 そ Tilleyは ...に つ い て ふ れ てお きた い 。 こ こで は石 灰岩が閃緑 岩類 の 迸 入 を scawtite, な どが 産 出 し,そ う け た 接 触 綿 に, tilleyite, spurrite
Report (issue)
16 ¯ = 101 ± 190 Z=4 X-ray Powder Pattern: Luna Co., New Mexico, USA. (ICDD 13-496). 2.701 (100), 2...Gehlenite, merwinite, tilleyite, hillebrandite, scawtite, kilchoanite, rankinite, larnite, foshagite, wollastonite...at Crestmore, Riverside Co., California; in the Tres Hermanas district, Luna Co., New Mexico; and from...and Meagher Co., Montana. In Ireland, from Scawt Hill, near Larne, and at Carneal, Co. Antrim, and at Carlingford...Carlingford, Co. Louth. From Camas Mµor, Isle of Muck, and at Camphouse, Ardnamurchan, Argyllshire, Scotland
Journal (article/letter/editorial)
of Groundwater, in the Carneal Plug, Co. Antrim, Northern Ireland institute of Geological Sciences, Exhibition...March 1982) ABSTRACT The Carneal plug, Co. Antrim, Northern Ireland, is a Tertiary dolerite intrusion, 150...wollastonite, melilite (humboldtilite), merwinite, scawtite, and hydrogrossular. Retrograde processes provide...Tertiary basaltic lavas at Carneal, Co. Antrim, Northern Ireland, incorporates blocks of the underlying...Carrickfergus Sheet 29, Geological Survey of Northern Ireland). The position of the Carneal phig is indicated
Journal (article/letter/editorial)
W. F. Fosnac Scawtite Trrrnv, C E., Scawtite, a ne\rymineral from Scawt Hill, Co Antrim. With chemical...pp . 222-224, lg3} Nlltn: From the locality, Scawt Hill. Cnnurclr Pnoptprrrs: Calcium silicate-carbonate...meiilite bearing types of hybrid rocks at Scawt Hill, co Antrim, associated with calcite, thomsonite and
Journal (article/letter/editorial)
SOCIETIES MINERALOGICAL SOCIETY OF GREAT AND IRELAND BRITAIN Annitersary Meeting, Nouember 4 The following...read: (1) Scawtite pseudomorphs after spuffite land. By Pnor. C. M. Trr.r.nv. at Scawt Hill, Co. Antrim...Antrim, Northern Ire- Scawtite, previously described from the endogenous contact-zone of the Scawt HilI
Journal (article/letter/editorial)
948 Ferrian chlorospinel from Carneal, Co. Antrim By P. A. SABI~qE, with chemical analysis by G. A...Summary. A Tertiary dolerite plug at Carneal, Co. Antrim has been contaminated by Chalk with the production...Geological Survey of Northern Ireland (Institute of Geological Sciences) at Carneal, Co. Antrim (Robbie, 1960)...described in the classic series of researches on Scawt Hill by Tilley and his colleagues (especially Tilley...aegirine, and in the contact zone there are larnite, scawtite, spurrite, merwinite, wollastonite, gehlenite
Journal (article/letter/editorial)
Thermochemistry of two calcium silicate carbonate minerals: scawtite, Ca7(Si6O18)(CO3)2H2O, and spurrite, Ca5(SiO4)2(CO3)...sequestration environment. Two minerals in this class, scawtite, Ca7(Si6O18)(CO3)2H2O, and spurrite, Ca5(SiO4)2(CO3)...formation from the oxides is 689.5 ± 14.3 kJ/mol for scawtite and 455.1 ± 9.7 kJ/mol for spurrite, and the...from the elements is 11564.5 ± 16.8 kJ/ mol for scawtite and 5845.5 ± 10.9 kJ/mol for spurrite. By using...products, the standard entropy of formation for scawtite was estimated. The energetics for several reactions
Journal (article/letter/editorial)
be recognized. Rankinite, since its record at Scawt Hill in 1942, has been found in the island of Muck...representing the phases in the system CaO-SiO 2 -CO 2 (Text-fig. 1). Wo CaO TEXT-FIG. 1.—A condensed...= spurrite, Ra = rankinite, La = larnite [Sc = scawtite, A = Ca3SiO6]. The steps 1-5 are indicated. The...diagram of Text-fig. 1. With movement away from the CO 2 corner the indicating lines encounter successively...metamorphism. One further phase, the silicate-carbonate, scawtite (Sc) is recorded in Text-fig. 1. Its composition
Journal (article/letter/editorial)
W. F. Fosnac Scawtite Trrrnv, C E., Scawtite, a ne\rymineral from Scawt Hill, Co Antrim. With chemical...pp . 222-224, lg3} Nlltn: From the locality, Scawt Hill. Cnnurclr Pnoptprrrs: Calcium silicate-carbonate...meiilite bearing types of hybrid rocks at Scawt Hill, co Antrim, associated with calcite, thomsonite and
Book
(Cotype) BM 1979,00135 Green River Fonnation, Uintah Co., Utah, USA A. Pabst, P.A. Estep, E.J. Dwornik, R...Apachite (Cotype) BM 1980, 00532 Christmas Mine, Gila Co., Arizona, USA F.P. Cesbron & S.A. Williams (1980)...BM 86511 Borax Consolidated mines, San Bernardino Co., California, U.S.A. W.B. Giles (1903) Min. Mag....Bannisterite (Cotype) BM 1967,00321 Franklin, Sussex Co., New Jersey, USA M.L. Smith & C. Frondel (1968)...(Cotype) BM 1912,00615 Hom Silver mine, Frisco, Beaver Co., Utah, USA B.S. Butler & W.T. Schaller (1911) J
Journal (article/letter/editorial)
Manual of the Mineralogy of Great Britain and Ireland (1858). These lists were published in the Reports...Somerset; 1 from Cheshire; 2 from Scotland; and 2 from Ireland). Geographical distribution of the minerals: of...England (75 of which are from Cornwall); 28 from Ireland; and 10 from Wales. (The remaining 12 minerals...(48 from Cornwall); 35 from Scotland; 19 from Ireland; and 7 from Wales. The remaining 5 are simply British...example, for SW England, Pennines and northern England, Wales, Ireland, Scotland, etc. When this has been
Journal (article/letter/editorial)
43, MAY_JUNE, 1958 THE CRYSTAL CHEN{ISTRY OF SCAWTITE Duwc,qN McCoNNnr,r,x Ohio State University, Columbus...the crystal chemistry of a mineral as complex as scawtite must judiciously employ the meager data available...substance. ANaLyrrcar D,c,rA. Two chemical analysesof scawtite have been recorded previously, one by Hey (Tilley...Health Service. 498 499 CRYSTALCIIEMISTRVOF SCAWTITE and carbon dioxide of Table 1. It is noticeablethat...SiOz COz H:O* Others* 1. Axer,vsns or Scewtrrs Scawt Hill (H"v) Ballycraigy (Scoon) +64 34,2 1 8. 0
 
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