MINERALOGICAL MAGAZINE

VOLUME 4 2 NUMBER 322 JUNE I978

Fourth supplementary list of British minerals

PETER G. EMBREY Department of Mineralogy, British Museum (Natural History)

AN invitation by Mr. Richard Lambert to write a would be about twice this number, 2 so there are foreword for a facsimile edition of 'Greg and perhaps 2ooo species awaiting record from the Lettsom' (Lapidary Publications, 1977) has al- British Islands. lowed me to persuade him to append L. J. Spencer's I thank R. K. Harrison, E. A. Jobbins, and B. R. three supplementary lists of British minerals, and Young, Institute of Geological Sciences, and my has provided the occasion for a fourth list to bring colleagues at the BM(NH) for bringing additional the work reasonably up to date. This fourth list is information to my notice. now repririted by his kind permission. I had expected the new list, a mere 19 years after the previous one, to be relatively short, and have been amazed to find it running to some 131 entries, Aerugite Ni9As3016 Monoclinic most of them valid species (II2). Some of the Green massive, with yellow xanthiosite, quartz, records are provisional, in the sense that identifica- and arsenides near the south shaft at South Terras tion was uncertain. I have included a few inter- mine, St. Stephen-in-Brannell, Cornwall. R. J. esting varieties, and--following Spencer--a few Davis, M. H. Hey, and A. W. G. Kingsbury (1965), new records (marked with a double asterisk **) Mineral. Mag. 35, 72. based on specimens in the national mineral collec- tion at the British Museum (Natural History) or on private communications. Some records consist Agardite Hexagonal solely of a mere mention in a paper, or of an exhibit (Ln, CaH)Cu6(AsO4)a(OH)6.3H20 at a meeting of the Mineralogical Society, for which Pale-green fibres, resembling aurichalcite and I have added details of locality or description in giving the powder-pattern of mixite (q.v.), on those cases where I have seen the specimens. In the mimetite in quartz on old specimens in the main these additions relate to specimens found by BM(NH), at Wheal Alfred, Phillack, Cornwall. The the late Arthur Kingsbury (I9O6-68). County refer- variety agardite-(Nd), according to F. Permingeat, ences are to the old boundaries, throughout. priv. comm. Spencer 1 considered that his three lists added about 25o species to the 24I given by Greg and Akermanite Ca2(MgSi, Al2) SiO: Tetragonal Lettsom, so that with the present list the total is Small coloudess or faintly brown crystals in now about 6oo. I have not checked these figures, thermally altered limestone at Kilchoan, Ardna- which need revision in the light of investigations murchan, Argyllshire, . S. O. Agrell (1965), that have affected the status of some species by Mineral. Mag. 34, 2. downgrading them to varieties or (as with tour- maline) making them group names covering several species. Spencer also estimated the number of Algodonite near Cu6As Orthorhombic known species to be about 13oo; a current estimate R. K. Harrison (I973). See under maucherite. 2 Consider, for example, the entries in M. Fleischer's x L. J. Spencer (I958), Mineral. Mag. 31, 787. 'Glossary of Mineral Species' (1975). ~) Copyright the Mineralogical Society 17o P. G. EMBREY Alunite KA13(SO4)2(OH)6 Rhombohedral is the dimorph bannisterite. M. L. Smith and Small eolourless rhombs and white massive from C. Frondel (I948), Mineral. Mag. 36, 893. a vein in a dolerite sill at Embleton quarry, near Cockermouth, Cumberland. A. W. G. Kingsbury Bazirite BaZrSi30 9 Hexagonal (I955), Mineral. Mag. 32, 4x8. Colourless interstitial accessory mineral in the aegirine-granite of Rockall, North Atlantic. A new **Amalgam Hg-Ag alloy Cubic species. J. R. Hawkes, R. J. Merriman, R. R. Thin dull brassy sheets on grey baryte, with Harding, and D. P. F. Darbyshire 0975), Rep. Inst. tennantite in limestone, at Gortdrum mine, Oola, Geol. Sci., no. 75/x, IX-51; Rep. Inst. geol. Sci. Co. Tipperary, Ireland. BM(NH) specimens, col- (1973), 123. B. R. Young, J. R. Hawkes, R. J. lected by A. J. Criddle and G. S. Bearne, I974. Merriman, and M. T. Styles (t978), Mineral. Mag. 42, 35 40. [See also under 'Rinkite-group Amblygonite (Li, Na)A1PO4(F, OH) Triclinic mineral'.] See under montebrasite. Also, in leucogranite near the roof of the Tregonning granite, Rinsey, Beryllonite NaBePO4 Monoclinic Cornwall. C. S. Exley and M. Stone (x964), in Colourless isolated crystals (2 cm) from a pegma- 'Present views of some aspects of the geology of tite vein in the old aplite quarry at Meldon, Cornwall and Devon' (Roy. geol. Soe. Cornwall), Okehampton, Devon. A. W. G. Kingsbury (I964), pp. I44-5, Mineral. Mag. 35, lvii. Anglesite (var. radian anglesite) Betafite (?) Metamict Small (< o.I ram) white crystals of anglesite in 'A pyrochlore mineral, probably betafite' in the uraniferous hydrocarbon at Wheal Speed, Corn- Chiapaval granite pegmatite, South Harris, Outer wall, contain co-precipitated radium. Other loca- Hebrides. O. von Knorring and R. Dearnley (196o) , lities for radium concentrations are given. R. K. Mineral. Mag. 32, 370, 373. Harrison and K. Taylor (I966), Bull. geol. Surv. Gt. Britain, 25, 4 I. Bicchulite Ca2AlzSiOT. H20 Cubic * *Ardennite Orthorhombic Colourless crust, an alteration product of Complex arsenate-vanadate-silicate of Mn, gehlenite, on wollastonite with hydrogrossular and AI, etc. garnet, in thermally altered chalk at Carneal, Orange-brown cleavages on vein quartz, at Co. Antrim, Ireland. A new species. C. Henmi, Merehead quarry, near Shepton Mallet, Somerset. I. Kusachi, K. Henmi, P. A. Sabine, and B. R. Specimen found by C. Parkinson (1977) and given Young (I973), Mineral. Journ. (Sapporo), 7, z43-5 I. to BM(NH). Birnessite (Na, Ca)MnTO14.3H20 Argentojarosite Rhombohedral Minute black crystals in grains (< 8 mm) of AgF%(SO4XOH)6 manganese oxide 'pan' in a road cutting at Birness, Yellow, micaceous, and ochreous, at West Turf 2o miles north of Aberdeen, Scotland. A new Pits mine, Grassington Moor, Yorkshire. Also, at species. L. H. P. Jones and A. A. Milne (t956), Treore mine, St. Teath, Cornwall. A. W. G. Kings- Mineral. Mag. 31, 283. bury (I964), Mineral. Mag. 35, li; idem (I964), in Bismutoferrite BiFe2(SiO4)2OH Monoclinic 'Present views of some aspects of the geology of Cornwall and Devon' (Roy. geol. Soc. Cornwall), Greenish-yellow massive, in quartz and bismuth at South Terras mine, St. Stephen-in-Brannell, p. 249. Cornwall. A. W. G. Kingsbury (I963), Mineral. Arthurite Monoclinic Mag. 33, xc. near CuFe2(AsO4)2(O, OH)2.4H20 Thin apple-green crusts, alone or with pharma- Blixite (?) PbCI2(O, OH),_x Orthorhombic cosiderite or a hidalgoite-like mineral or both, on Yellow, cleavable masses in hydrocerussite, etc., quartzose matrix at Hingston Down Consols, at Merehead quarry, Somerset. C. J. Alabaster Calstock, Cornwall. A new species. R. J. Davis and (i975) , Proe. Bristol Nat. Soe. 34, 89, 92. M. H. Hey (I964), Mineral. Mag. 33, 937. Also, with brucite, same locality, idem (I977), Mineral. Mag. 41,406. [-Presumably the same as the Bannisterite Monoclinic 'un-named lead oxychloride' (q.v.), which has a dimorph of Ganophyllite different X-ray powder pattern from that of type Some of the ganophyllite at Benallt mine, Rhiw, blixite; the author was informed of this difference Caernarvonshire (W. Campbell Smith et al., I948) before publication--P. G. E.] FOURTH SUPPLEMENTARY LIST OF BRITISH MINERALS 171 Calomel Hg2CI2 Tetragonal Dry Gill mine, Caldbeck Fells, Cumberland. J. Grey crystals with native mercury and malachite Hartley (196o), Mineral. Mag. 32, 343. [Is probably in oxidized ore at Chatsworth mine, Grassington present in the manganese oxides of the Mendip Moor, Yorkshire. A. W. G. Kingsbury (I968), Hills, and elsewhere.] Mineral. Mag. 37, xlii. Corundophilite Chlorite group **Chernovite (?) YAsO, Tetragonal Dark-green compact, filling amygdales in basalt May be a constituent of black globules (< 5 mm) at An Gearna, Ben More, Isle of Mull; also green on massive pink gypsum at Gipsy Lane, Leicester. radiating with calcite, Mill Close mine, Darley Specimens collected by N. Hubbard (1976) and Dale, Derbyshire. Specimens in BM(NH). given to BM(NH). [Gives an X-ray powder pattern near chernovite; spectrographic confirmation of Y, ** Cowlesite Orthorhombic As, with Cu, U, Si, AI, etc.; sulphide also present.] (Ca, Na)AIzSiaOIo.5-6H20 A new 0975) zeolite mineral, now identified on Chrysoberyl BeA120, Orthorhombic specimens from Northern Ireland. R. W. Green crystal plates ( < 2 cm) with feldspar from Tschernich 0977), priv. comm. With levyne and a pegmatite in the old aplite quarry at Meldon, erionite in weathered boulders on the shore at Okehampton, Devon. A. W. G. Kingsbury (i964) , Dunseverick, and in fresh rock in the old quarry at Mineral. Mag. 35, lvii. [The earlier record by Ballyclare, and elsewhere in Co. Antrim. H. Foy S. Haughton (I856), from the Mourne Moun- (I977), priv. comm. tains, Ireland, lacked confirmatory detail.] Crandallite Rhombohedral Cinnabar HgS Rhombohedral CaAI3(PO,)z(OH)5. H20 Small, red, earthy patches with smithsonite on Microscopic colourless grains with apatite, fluorite, at Rutland Cavern, Matlock Bath, Derby- kaolinite, etc. in the Rowhurst Tonstein at Red shire. Also at Masson Hill, Matlock. R. S. W. Street colliery, near Kidsgrove, Staffordshire. A. A. Braithwaite, T. B. Greenland, and G. Ryback Wilson, G. A. Sergeant, B. R. Young, and R. K. (1963), Nature, 200, 1oo4; Mineral. Mag. 33, lxxxvi. Harrison (1966), Proc. Yorks. geol. Soc. 35, 421. A. W. G. Kingsbury (1963), ibid. 33, xc. From Yorkshire, various localities, including Cryptomelane KMnsO16 Monoclinic minute crystals at Turf Pits and Moss mines, See under lithiophorite. Grassington Moor, and tetrahedral pseudomorphs after metacinnabarite (q.v.) at Pear's Pasture, near **Danburite CaB2Si20 8 Orthorhombic Pateley Bridge. A. W. G. Kingsbury (i968), A single colourless terminated crystal, found Mineral. Mag. 37, xlii. with milarite, beryl, and phenakite in a clay-filled From Ireland, crystalline on muddy limestone with calcite, at Gortdrum mine, Oola, Co. Tipper- rug at Cheesewring quarry, Linkinhorne, Corn- ary. BM(NH) specimens, collected by A. J. Criddle wall, by A. W. G. Kingsbury (I95I-2) and given to the BM(NH). in 197o. Coffinite U(SiO4)~_x(OH)4x Tetragonal Dellaite Ca128i6022(OH), Triclinic (?) Replacements of and pseudomorphs (< 5 mm) Small (< 2 mm) bladed crystals with calcite in after colloform pitchblende at Roskrow United spurrite assemblages in thermally altered limestone mine, Ponsanooth, Cornwall. K. Taylor and R. K. at Kilchoan, , , Scotland. Harrison (i958), Nature, 181,363; (I966), Bull. geol. A new species. S. O. Agrell (1965), Mineral. Mag. Surv. Gt. Britain, 25, 33. 34, 6. Also at Kingswood mine, near Buckfastleigh, Devon, and at Geevor, South Terras, and other Digenite Cu 1.8 S Cubic mines in Cornwall. A. G. Darnley 096I), Mineral. Djurle'ite Cu1.93 S Orthorhombic Mag. 33, lxi; 34, 159. These two species closely resemble chalcosine, Also, in the nodules of Budleigh Salterton, and cannot readily be distinguished from it. Devon. R. K. Harrison (1975) , Bull. geol. Surv. Gt. Dj urlei'te is closer in composition to chalcosine, and Britain, 52, 15. is probably commoner than digenite. Chalcosine (sensu lato) has several crystal habits, which on Coronadite PbMn8016 Tetragonal investigation may prove to be diagnostic; a survey, Silver-grey to black fibrous, botryoidal, with by X-ray and other methods, is needed. W. R. Cook, quartz, campylite, and other manganese oxides at Jr. (1972), Mineral. Record, 3, 15, has found that 172 P. G. EMBREY some old specimens of Cornish chalcosine are Eudidymite NaBeSi30~(OH) Monoclinic djurle'ite or digenite, and suggested that conversion White pearly crystal plates and cleavages (< 3 has taken place, caused by removal of copper by cm) with feldspar from a pegmatite vein in the old oxidation. At the BM(NH) we have identified: aplite quarry at Meldon, Okehampton, Devon. digenite from Botallack mine, Cornwall, and from A. W. G. Kingsbury 0964), Mineral. Mag. 35, lvii. 'near Tavistock', Devon; djurlei'te from Wheal Owles and from Dean quarry, Cornwall, from F erricopiapite Triclinic Merehead and Cannington Park quarries, Somer- Fe 5(SO4)60(OH ). 2oH20 set, and from Gipsy Lane, Leicester. A specimen Pale-yellow botryoidal with copper on fluorite at of digenite from the Falls of Rogie, Ross and Grove Rake mine, Rookhope, Weardale, Co. Cromarty, is in the Geological Museum, I.G.S. Durham. F. W. Smith (1973), Mineral. Mag. 39, 244. Also, see under Wittichenite. The newly described mineral anilite, orthorhombic Cu7S4 (Amer. Foshagite Ca4SiaO9(OH)2 Triclinic Mineral. (1969), 54, t256), is readily converted to Colourless fibrous aggregates with merwinite, digenite even by gentle grinding and so will not larnite, or kilchoanite at the margins of veins (o-I- be discovered by normal X-ray powder surveys. 2.o mm wide) in thermally altered limestone at Kilchoan, Ardnamurchan, Argyll, Scotland. S. O. **Durangite NaA1AsO4F Monoclinic Agrell 0965), Mineral. Mag. 34, 8. Reddish-brown crystal fragments from an E.-W. ** Francevillite Orthorhombic joint face of the granite at Cheesewring quarry, Ba(UO2)2(VO4)2.5H20 Linkinhorne, Cornwall. Collected by A. W. G. Yellow earthy crust on pitchblende nodule, at Kingsbury (I958) and given to the BM(NH). South Terras mine, St. Stephen-in-Brannell, Corn- Elbaite Lithium tourmaline wall. BM(NH)specimen, from V. P. Aspland (1936). The pink (var. rubellite) and green (var. verdelite) Freirinite (syn. of lavendulan) tourmalines of the Meldon aplite, Okehampton, R. K. Harrison (1975). See under maucherite. Devon, have been analysed. M. N. Chaudhry and R. A. Howie (1976), Mineral. Mag. 40, 747. Gahnite ZnA1204 Cubic Crystals and massive in the Chiapaval granite Elpidite - Orthorhombic pegmatite, South Harris, . O. yon Na2ZrSi6015- 3H20 Knorring (t96o), Mineral. Mag. 32, 374. Creamy-white and yellowish needles in cavities Garronite Orthorhombic or interstitially in the aegirine-granite of Rockall, Na2CasAll 2Si20064.27H20 North Atlantic. P. A. Sabine (I96O), Bull. geol. Surv. Gt. Britain, 16, 167-8. [Confirms an earlier record Colourless radiating zeolite filling amygdales by Lacroix (I921), not in Spencer's lists.] (< 2 cm) in olivine basalt in screes on the western slopes of the Glenariff valley, and at five other Erionite Hexagonal localities in Co. Antrim, Ireland. New species. (Ca, Na, K)2AlsSigO24.9H20 G. P. L. Walker 096o), Mineral. Mag. 32, 5o5; 33, Fibrous coatings on levyne, in amygdales in 173. various rhyolitic and basaltic lavas in Co. Antrim, Genthelvite Cubic Ireland. JR. A. Old and B. R. Young], Rep. Inst. (Zn, Fe, Mn)4Be3(SiO4)3S geol. Sci. (1973), p. 124. See also under Cowlesite. Pink blebs with garnet and chlorite at Trebur- land, Altarnun, Cornwall. A. W. G. Kingsbury Eskolaite Cr20 3 Rhombohedral (1961), Mineral. Mag. 32, 929. Very thin green coatings round quartz grains in Green and brown zoned tetrahedra (< 13 ram) greywacke pebbles in boulder clay at Callowhill with bertrandite crystals in cavities in adamellite at Upper, near Newtown Mt. Kennedy, Co. Wicklow. Coire an Lochain, Cairngorm Mountains, Scot- M. J. Oppenheim et al. (1977), Mineral. Mag. 41, land. W. C. Morgan (1967), ibid. 36, 60; A. M. Clark 402. and E. E. Fejer (1976), ibid. 40, 637. 'Eucolite-eudialyte mineral' Gismondine CaA12SiEOs .4H20 Monoclinic Incompletely characterized colourless mineral, Chalky white, radiating, with chabazite in amyg- almost isotropic, in a cavity of the aegirine-granite dales in basalt at Bruslee quarry, Ballyclare, and at of Rockall, North Atlantic. P. A. Sabine (I96o), other localities in Co. Antrim, Ireland. G. P. L. Bull. geol. Surv. Gt. Britain, 16, 168- 9. Walker (i962), Mineral. Mag. 33, 187. FOURTH SUPPLEMENTARY LIST OF BRITISH MINERALS I73 An earlier record (Bryce, I833) is discounted as a Hydroscarbroite AI2(CO3) 2. I2AI(OH)3.nH20 mixture of chabazite and heulandite. Ibid. 32, 2o7. With scarbroite as a fine-grained white compact mixture in fissures in sandstone at South Bay, Glauberite Na2Ca(SO4)2 Monoclinic Scarborough, Yorkshire. W. J. Duffin and J. Good- Replacing anhydrite and polyhalite in evaporites year (196o), Mineral. Mag. 32, 353. at Forden, near Scarborough, Yorkshire. F. H. Stewart (t965), Mineral. Mag. 34, 465 . Ilsemannite (?) Mo3Oa.nH20 (?) **Greenovite (var. of sphenc) A blue post-mining efflorescence on limestone and anhydrite in the mine under the I.C.I. factory Pink subhedral crystals in quartz at the British site at Billingham-on-Tees, Co. Durham. L. R. Rail quarry, Meldon, Okehampton, Devon. Found Raymond (t959), Mineral. Mag. 32, I72. by A. W. G. Kingsbury (I958) and given to the BM(NH). ** Ilvaite Orthorhombic Gudmundite FeSbS Monoclinic CaFe 2 § Fe 3 +(SiO4)2OH In marcasite pseudomorphs, and intergrown Black, coarsely radiating, and granular massive, with tetrahedrite, at the Shallee and Gortnadyne at Wheal Messer, Lanivet, Cornwall; in Devon at mines, Silvermines, Co. Tipperary, Ireland. H. N. Ramsley mine, Okehampton, and at Smallacombe Rhoden (I959), Mineral. Mag. 32, I33. iron mine, Ilsington. Collected at different times by A. W. G. Kingsbury and given to the BM(NH). Helvine (Mn, Fe, Zn)aBe3(SiO,)3S Cubic Yellow tetrahedra ( < 2 mm) and massive in calc- I ron-boracite Orthorhombic flinta at Bodmin Wheal Mary (Wheal Ding sec- (Fe, Mg, Mn)3BTOx3C1 tion), Lanivet, Cornwall. Also, as small grains, at Blue-green 'cubo-octahedral' crystals (< 3 ram) Wheal Betsy, Tremore, Lanivet; and at Red-a- and brown-purple grains, usually with sylvine, etc., Ven Brook mine, Meldon, Okehampton, Devon. in nodules in anhydrite shale at the Boulby mine, A. W. G. Kingsbury 0960, Mineral. Mag. 32, 924. Loftus, Saltburn, Cleveland, Co. Durham. J. K. Milne, M. J. Saunders, and P. J. E. Woods (1977), Heteromorphite (?) Monoclinic Mineral. Mag. 41, 4o4. PbTSbsS19 Two specimens from Port Isaac, Cornwall, were Julgoldite Monoclinic recorded by W. Nevill (x872) in the printed cata- CazFe2 +(Fe, AIXSiOaXSi2OTXOH)2. H 20 logue of his collection (p. 2o). Doubtless omitted by Black grains or plumose crystal groups, with Spencer from his lists because of presumed sy- pectolite, in dolerite quarries at Ratho, near Edin- nonymy with semseyite. Confirmation is required. burgh, and at Auchinstarry, Kilsyth, Scotland. A. Livingstone (1976), Mineral. Mag. 40, 76t. Hidalgoite (?) Rhombohedral [Mistaken by M. F. Heddle for aenigmatite, and PbA13SO,AsO,(OH)6 for goethite.] Incompletely characterized mineral close to hidalgoite, associated with arthurite and pharma- 'Kasolite-like mineral' cosiderite, at Hingston Down Consols, Calstock, Predominantly a thorium-lead silicate, but with Cornwall. R. J. Davis and M. H. Hey (I964), an X-ray powder pattern similar to that ofkasolite, Mineral. Mag. 33, 937. See also E. B. F6rsch, ibid. forming an olive-green rim surrounding uraninite, 36, 530. in the Chiapaval granite pegmatite, South Harris, Hinsdalite (?) Rhombohedral Outer Hebrides. O. von Knorring and R. Dearnley PbAIaSO4PO4(OH)6 (i96o), Mineral. Mag. 32, 376. A specimen of bluish-grey plumbogummite from Kilchoanite CaaSi207 Orthorhombic Roughton Gill, Cumberland, appeared to be a mix- crystal of hinsdalite, plumbogummite, and hidalgo- Small (< 2 mm) interlocking crystals with ite. E. B. F6rsch 0967), Mineral. Mag. 36, 53o. rankinite, in thermally altered limestone at Kil- choan, Ardnamurchan, Argyll, Scotland. A new Hfgbomite H and R polytypes species. S. O. Agrell and P. Gay (I960, Nature, 189, (Mg, Fe)2(A1, Ti)~Ot0 743; Mineral. Mag. 34, 5. Brown grains with green spinel intergrown with magnetite in corundum in a complex xenolith in Killalaite 2Ca3Si207. H20 Monoclinic gabbro at Cashal, near Toombeola, Co. Galway, Colourless crystals (< 2 mm) in veins and cavi- Ireland. D. McKie 0963), Mineral. Mag. 33, 563 . ties with calcite or afwillite in thermally altered I74 P. G. EMBREY limestone at Killala Bay, near Inishcrone, Co. Sligo, Meneghinite CuPblaSbTS24 Orthorhombic Ireland. A new species. R. Nawaz (I974), Mineral. Small needles with siderite in quartz at Shallow- Mag. 39, 544- ford Bridge, near South Molton, Devon; also massive, compact, at Pengenna mine, St. Kew, Lavendulan (of Goldsmith) Orthorhombic Cornwall. A. W. G. Kingsbury (~965), Mineral. NaCaCus(AsO4)4CI. 5H20 Mag. 35, 425. R. K. Harrison 0975). See under maucherite. Mercury Hg [Liquid] Leucophosphite Monoclinic Minute globules, with calomel and malachite in KFe~ +(PO4)2OH. 2H20 cavities of oxidized ore at Chatsworth mine, Grass- Waxy, orange-coloured interstitial colloform ington Moor, Yorkshire. A. W. G. Kingsbury grains and minute (< o.oo 3 mm) radiating fibres (I968), Mineral. Mag. 37, xlii. replacing pyroxene, feldspar, and elpidite, in the aegirine-granite of Rockall, North Atlantic. J. R. Metacinnabarite HgS Cubic Hawkes, R. J. Merriman, R. R. Harding, and Small black tetrahedra with cinnabar on calcite, D. P. F. Darbyshire 0975), Rep. Inst. geol. Sci. 75/I, at Turf Pits mine, Grassington Moor, Yorkshire; p. 25. massive, with cinnabar in baryte-fluorite-calcite matrix at Cockhill mine, Bewerley, Pateley Bridge, Lithiophorite (A1, Li)MnO2(OH)2 Monoclinic Yorkshire. A. W. G. Kingsbury (I968), Mineral. Black fine-grained massive, sometimes botryoi- Mag. 37, xlii. dal, admixed with cryptomelane at the Lecht mines, Metatyuyamunite (?) Orthorhombic Tomintoul, Banffshire, Scotland. M. J. Wilson, M. L. Berrow, and W. J. McHardy (I97O), Ca(UO2)E(VO4)2.3-5H20 Mineral. Mag. 37, 618. Yellow alteration product of a vanadiferous nodule of Permian age, at Budleigh Salterton, Mackinawite (Fe, Ni, Co)988 Tetragonal Devon. [May possibly have been pascoite, mis- identified.] J. F. Wyley (I961), Mineral. Mag. 33, Minute flakes in magnetite-chlorite patches in xlvi. serpentinized peridotite at The Rill, Kynance Cliff, Lizard, Cornwall. A. H. Clark (t967), Mineral. M ilarite Hexagonal Mag. 36, 6i 4. K2Ca4Be4A12Si24Oro. H20 Small colourless prisms on a joint in the aplite at Maghemite (?) y-Fe20 a Cubic Meldon, Okehampton, Devon. A. W. G. Kings- Traces, with hematite in a laterite baked by a bury (I964), Mineral. Mag. 35, lvii. basalt dyke, at Lyles Hillmine, near Templepatrick, Larger prisms (< 8 mm) in vugs in a tourmaline Co. Antrim, Ireland. V. A. Eyles (I952), Mere. geol. vein at the Cheesewring quarry, Linkinhorne, Surv. Northern Ireland [Antrim laterites and bau- Cornwall. Found by A. W. G. Kingsbury 095I-2) xites], pp. 34, 4 I. and given to BM(NH).

Malayaite CaSnSiO 5 Monoclinic Mixite (?) Hexagonal Yellow-brown irregular aggregates (< 4 mm), BiCu6(AsO4)a(OH)6.3H20 with 1611ingite and datolite, in fibrous wollastonite Small radiating groups of pale-green fibres, with hornfels at Red-a-Ven Brook mine, Meldon, Oke- malachite on gossan matrix, found at Wheal Owles, hampton, Devon. Previously called 'tin sphene' St. Just, Cornwall, by A. W. G. Kingsbury and (q.v.). M. A. H. E1 Sharkawi and W. R. Dearman given to BM(NH). Some of it may be agardite (q.v.). (I966), Econ. Geol. 61, 366. Modderite (?) (Co, Ni, Fe)As Maucherite (Ni, Co, Fe)llAs8 Tetragonal A cobalt arsenide of uncertain identity. R. K. Permian nodular concretions at the Littleham Harrison (I974). See under maucherite. Cove area, Budleigh Salterton, Devon, contain native copper plates (< I6 cm) and annular nickel Montebrasite Tridinic arsenides (< IO ram). Associated species are nickel- (El, Na)A1PO4(OH, F) ine, rammelsbergite, maucherite, silver, modderite Greyish-white cleavage masses (2- 4 cm) of both (?), copper sulphides, malachite, and lavendulan. montebrasite and amblygonite, the latter rarer and R. K. Harrison (I973), Rep. Inst. geol. Sci. (I973) , darker in colour, in a pegmatite vein in the old I23-4; (1975), Bull. geol. Surv. Gt. Britain, 52, 1-26. aplite quarry at Meldon, Okehampton, Devon. FOURTH SUPPLEMENTARY LIST OF BRITISH MINERALS 175 A. W. G. Kingsbury (I964), in 'Present views on Pyroaurite (nickeloan var.) Rhombohedral some aspects of the geology of Cornwall and Mg4Ni2Fe3 +(OHh 3CO3.4H20 Devon' (Roy. geol. Soc. Cornwall), p. 249; see also Grass-green disseminations and coatings in Mineral. Mag. (1969), 37, 414. serpentinite in a roadside quarry I km west of Leslie, Aberdeenshire, Scotland. M. J. Wilson et al. Neotocite (Mn, Fe)SiO3. H20 (t976), Mineral. Mag. 40, 447. Collins's specimens of penwithite have been re- examined and found to be more properly referred Pyrobelonite MnPbVO4(OH) Orthorhombic to neotocite. A. M. Clark and J. Easton (I978), Veinlets and individual grains (< 5 mm) with Mineral. Mag. 42, M26. vanadinite in iron-manganese ore at Ty Coch, near South Cornelly, Mid Glamorgan, Wales. A. J. (?) Na3Mg(CO3)2C1 Cubic Northupite Criddle and R. F. Symes (1977), Mineral. Mag. 41, A doubtful occurrence in the Lower Anhydrite of 85. the Yorkshire potash field. F. H. Stewart (1965) , Mineral. Mag. 34, 462. Pyrosmalite Trigonal (Fe, Mn)sSi6Ols(OH, Clho **Osarizawaite Rhombohedral Small crystals (< 0"5 ram) in contact-altered slate PbCuA12(SO4) 2(OH)6 at Nant Francon, North Wales. P. E. Brown (I959), Yellowish-green crust and impregnation on Mineral. Mag. 32, 242. sandstone at Alderley Edge, Cheshire. Specimen Also, coarsely crystalline aggregate, at Trebur- found by R. Taylor (197o) and given to BM(NH). land mine, Altarnun, Cornwall. Ibid. (footnote), 32, Osumilite Hexagonal 244. KMg2A13(A12Sil o)O3o Reyerite Trigonal Small (0. i ram) crystals in glass on contact zone Hydrous aluminosilicate of Ca, Na, K round dolerite plug at Tieveragh, Co. Antrim, With gyrolite in basalt at 'S Airde Beinn, North- Ireland. First record of K, Mg end-member. G. A. ern Mull, Scotland. J. R. Cann (1965) , Mineral. Chinner and P. D. Dixon (1973) , Mineral. Mag. 39, Mag. 35, I. I89. A Scottish specimen, otherwise unlocalized, is referred to by R. A. Chalmers et al. (1964), ibid. 33, Pascoite (.9) Ca3VloO28. I7H20 Monoclinic 839. Perhaps the mineral identified as metatyuya- munite (q.v.). Rhodizite Cubic CsA14Be4B1 IO25(OH)4 Plumbojarosite Rhombohedral Small colourless crystals on rubellite from the PbFe63 + (SO4)4(OH)12 new aplite quarry at Meldon, Okehampton, Alteration product of beudantite at Driggith Devon. A. W. G. Kingsbury (1964), Mineral. Mag. mine and at Balliway Rigg, Caldbeck Falls, 35, NiL Cumberland; also at Treore mine and at Wheal Carpenter, Cornwall. A. W. G. Kingsbury and J. 'Rinkite-group mineral' Hartley (I96o), Mineral. Mag. 32, 423. Incompletely characterized mineral in the aegir- Also at Turf Pits mine, Grassington Moor, ine-granite of Rockall, North Atlantic. Is now Yorkshire. A. W. G. Kingsbury (1964), ibid. 35, li. called bazirite (q.v.). P. A. Sabine 096o), Bull. geol. Surv. Gt. Britain, 16, I68. Posnjakite Cu4SO4(OH)6.H20 Monoclinic Blue crystalline crusts, with brochantite and Roman~chite Orthorhombic langite, as a post-mining formation at Drakewalls BaMn 2 + MnaO 16(OH)4 mine, Gunnislake, Cornwall. Also, with langite, on Species name approved by the I.M.A. to replace old specimens from Fowey Consols, St. Blazey, psilomelane, which is now a general term for hard Cornwall. See also under wroewolfeite. J. R. Knight manganese oxides. and R. W. Barstow (197o), Mineral. Mag. 37, 74o. Roscoelite (?) (vanadium mica) **Priceite Ca4BloO19.7H20 Triclinic (?) Vanadium in the Permian nodular concretions White porcellanous massive, from a pegmatite at Budleigh Salterton, Devon, appears to be con- in the old aplite quarry at Meldon, Okehampton, centrated mainly in a mica mineral, probably Devon. Collected by A. W. G. Kingsbury (1959) roscoelite. R. K. Harrison (r975), Bull. geol. Surv. and given to the BM(NH). Gt. Britain, 52, 11, 15. t76 P. G. EMBREY Rustumite Ca3Si207(OH)2 Monoclinic views of some aspects of the geology of Cornwall Small colourless crystals (< 2 mm) in a zone and Devon' (Roy. geol. Soc. Cornwall), p. 249. between spurrite and kilchoanite assemblages in Tacharanite Monoclinic thermally altered limestone at Kilchoan, Ardna- Cat 2A12SilaO69H36 murchan, Argyll, Scotland. A new species. S. O. White compact, altering to tobermorite and Agrell (1965), Mineral. Mag. 34, 2. gyrolite, in vesicles of an olivine-dolerite near Schorlomite Cubic Portree, . A new species. J. M. Sweet Ca3(Fe, Ti)2(Si, Ti)3012 (i96i), Mineral. Mag. 32, 745. Other localities in Scotland and Ireland; G. Cliff With ferroan wollastonite and titanaugite in a pegmatite at Camphouse, Ardnamurchan, Argyll, et al. (I975), ibid. 40, ii 3. Scotland. R. A. Howie and A. R. Woolley (I968), Tange~te CuCaVO4OH Orthorhombic Mineral. Mag. 36, 779. Greenish-yellow crust on gypsum, near vanadi- ferous nodules in Keuper Marl, in a brick pit at Sideronatrite Orthorhombic Glen Parva, Leicestershire. R. J. King and J. A. Na2Fe(SO4)2OH. 3H20 Dixon (I971), Mineral. Mag. 38, 488. Small (